vcr1: drop pointless write-only AVCodecContext member from VCR1Context
[ffmpeg.git] / avconv.c
index b5a171d..1aed704 100644 (file)
--- a/avconv.c
+++ b/avconv.c
@@ -31,8 +31,8 @@
 #include "libavformat/avformat.h"
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"
+#include "libavresample/avresample.h"
 #include "libavutil/opt.h"
-#include "libavcodec/audioconvert.h"
 #include "libavutil/audioconvert.h"
 #include "libavutil/parseutils.h"
 #include "libavutil/samplefmt.h"
@@ -50,6 +50,7 @@
 # include "libavfilter/avfilter.h"
 # include "libavfilter/avfiltergraph.h"
 # include "libavfilter/buffersrc.h"
+# include "libavfilter/buffersink.h"
 # include "libavfilter/vsrc_buffer.h"
 
 #if HAVE_SYS_RESOURCE_H
@@ -89,6 +90,7 @@ typedef struct StreamMap {
     int stream_index;
     int sync_file_index;
     int sync_stream_index;
+    char *linklabel;       /** name of an output link, for mapping lavfi outputs */
 } StreamMap;
 
 /**
@@ -145,6 +147,33 @@ static unsigned int allocated_async_buf_size;
 
 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
 
+typedef struct InputFilter {
+    AVFilterContext    *filter;
+    struct InputStream *ist;
+    struct FilterGraph *graph;
+} InputFilter;
+
+typedef struct OutputFilter {
+    AVFilterContext     *filter;
+    struct OutputStream *ost;
+    struct FilterGraph  *graph;
+
+    /* temporary storage until stream maps are processed */
+    AVFilterInOut       *out_tmp;
+} OutputFilter;
+
+typedef struct FilterGraph {
+    int            index;
+    const char    *graph_desc;
+
+    AVFilterGraph *graph;
+
+    InputFilter   **inputs;
+    int          nb_inputs;
+    OutputFilter **outputs;
+    int         nb_outputs;
+} FilterGraph;
+
 typedef struct FrameBuffer {
     uint8_t *base[4];
     uint8_t *data[4];
@@ -184,6 +213,11 @@ typedef struct InputStream {
 
     /* a pool of free buffers for decoded data */
     FrameBuffer *buffer_pool;
+
+    /* decoded data from this stream goes into all those filters
+     * currently video only */
+    InputFilter **filters;
+    int        nb_filters;
 } InputStream;
 
 typedef struct InputFile {
@@ -224,6 +258,7 @@ typedef struct OutputStream {
     int top_field_first;
 
     float frame_aspect_ratio;
+    float last_quality;
 
     /* forced key frames */
     int64_t *forced_kf_pts;
@@ -232,19 +267,16 @@ typedef struct OutputStream {
 
     /* audio only */
     int audio_resample;
-    ReSampleContext *resample; /* for audio resampling */
+    AVAudioResampleContext *avr;
     int resample_sample_fmt;
     int resample_channels;
+    uint64_t resample_channel_layout;
     int resample_sample_rate;
-    int reformat_pair;
-    AVAudioConvert *reformat_ctx;
     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
     FILE *logfile;
 
-    AVFilterContext *output_video_filter;
-    AVFilterContext *input_video_filter;
+    OutputFilter *filter;
     char *avfilter;
-    AVFilterGraph *graph;
 
     int64_t sws_flags;
     AVDictionary *opts;
@@ -276,6 +308,9 @@ static int         nb_output_streams = 0;
 static OutputFile   **output_files   = NULL;
 static int         nb_output_files   = 0;
 
+static FilterGraph **filtergraphs;
+int               nb_filtergraphs;
+
 typedef struct OptionsContext {
     /* input/output options */
     int64_t start_time;
@@ -382,6 +417,7 @@ typedef struct OptionsContext {
 static void reset_options(OptionsContext *o)
 {
     const OptionDef *po = options;
+    int i;
 
     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
     while (po->name) {
@@ -402,6 +438,8 @@ static void reset_options(OptionsContext *o)
         po++;
     }
 
+    for (i = 0; i < o->nb_stream_maps; i++)
+        av_freep(&o->stream_maps[i].linklabel);
     av_freep(&o->stream_maps);
     av_freep(&o->meta_data_maps);
     av_freep(&o->streamid_map);
@@ -545,28 +583,41 @@ static void filter_release_buffer(AVFilterBuffer *fb)
     unref_buffer(buf->ist, buf);
 }
 
-static const enum PixelFormat *choose_pixel_fmts(OutputStream *ost)
+static char *choose_pixel_fmts(OutputStream *ost)
 {
     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
-        ost->pix_fmts[0] = ost->st->codec->pix_fmt;
-        return ost->pix_fmts;
-    } else if (ost->enc->pix_fmts)
-        return ost->enc->pix_fmts;
-    else
+        return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
+    } else if (ost->enc->pix_fmts) {
+        const enum PixelFormat *p;
+        AVIOContext *s = NULL;
+        uint8_t *ret;
+        int len;
+
+        if (avio_open_dyn_buf(&s) < 0)
+            exit_program(1);
+
+        for (p = ost->enc->pix_fmts; *p != PIX_FMT_NONE; p++)
+            avio_printf(s, "%s:", av_get_pix_fmt_name(*p));
+        len = avio_close_dyn_buf(s, &ret);
+        ret[len - 1] = 0;
+        return ret;
+    } else
         return NULL;
 }
 
-static int configure_video_filters(InputStream *ist, OutputStream *ost)
+static int configure_video_filters(FilterGraph *fg)
 {
-    AVFilterContext *last_filter, *filter;
-    /** filter graph containing all filters including input & output */
+    InputStream  *ist = fg->inputs[0]->ist;
+    OutputStream *ost = fg->outputs[0]->ost;
+    AVFilterContext *in_filter, *out_filter, *filter;
     AVCodecContext *codec = ost->st->codec;
-    SinkContext sink_ctx = { .pix_fmts = choose_pixel_fmts(ost) };
+    char *pix_fmts;
     AVRational sample_aspect_ratio;
     char args[255];
     int ret;
 
-    ost->graph = avfilter_graph_alloc();
+    avfilter_graph_free(&fg->graph);
+    fg->graph = avfilter_graph_alloc();
 
     if (ist->st->sample_aspect_ratio.num) {
         sample_aspect_ratio = ist->st->sample_aspect_ratio;
@@ -577,15 +628,18 @@ static int configure_video_filters(InputStream *ist, OutputStream *ost)
              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
              sample_aspect_ratio.num, sample_aspect_ratio.den);
 
-    ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
-                                       "src", args, NULL, ost->graph);
+    ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
+                                       avfilter_get_by_name("buffer"),
+                                       "src", args, NULL, fg->graph);
     if (ret < 0)
         return ret;
-    ret = avfilter_graph_create_filter(&ost->output_video_filter, &sink,
-                                       "out", NULL, &sink_ctx, ost->graph);
+    ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
+                                       avfilter_get_by_name("buffersink"),
+                                       "out", NULL, NULL, fg->graph);
     if (ret < 0)
         return ret;
-    last_filter = ost->input_video_filter;
+    in_filter  = fg->inputs[0]->filter;
+    out_filter = fg->outputs[0]->filter;
 
     if (codec->width || codec->height) {
         snprintf(args, 255, "%d:%d:flags=0x%X",
@@ -593,51 +647,302 @@ static int configure_video_filters(InputStream *ist, OutputStream *ost)
                  codec->height,
                  (unsigned)ost->sws_flags);
         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
-                                                NULL, args, NULL, ost->graph)) < 0)
+                                                NULL, args, NULL, fg->graph)) < 0)
             return ret;
-        if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
+        if ((ret = avfilter_link(in_filter, 0, filter, 0)) < 0)
             return ret;
-        last_filter = filter;
+        in_filter = filter;
+    }
+
+    if ((pix_fmts = choose_pixel_fmts(ost))) {
+        if ((ret = avfilter_graph_create_filter(&filter,
+                                                avfilter_get_by_name("format"),
+                                                "format", pix_fmts, NULL,
+                                                fg->graph)) < 0)
+            return ret;
+        if ((ret = avfilter_link(filter, 0, out_filter, 0)) < 0)
+            return ret;
+
+        out_filter = filter;
+        av_freep(&pix_fmts);
     }
 
     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
-    ost->graph->scale_sws_opts = av_strdup(args);
+    fg->graph->scale_sws_opts = av_strdup(args);
 
     if (ost->avfilter) {
         AVFilterInOut *outputs = avfilter_inout_alloc();
         AVFilterInOut *inputs  = avfilter_inout_alloc();
 
         outputs->name    = av_strdup("in");
-        outputs->filter_ctx = last_filter;
+        outputs->filter_ctx = in_filter;
         outputs->pad_idx = 0;
         outputs->next    = NULL;
 
         inputs->name    = av_strdup("out");
-        inputs->filter_ctx = ost->output_video_filter;
+        inputs->filter_ctx = out_filter;
         inputs->pad_idx = 0;
         inputs->next    = NULL;
 
-        if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
+        if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
             return ret;
     } else {
-        if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
+        if ((ret = avfilter_link(in_filter, 0, out_filter, 0)) < 0)
+            return ret;
+    }
+
+    if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
+        return ret;
+
+    ost->filter = fg->outputs[0];
+
+    return 0;
+}
+
+static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
+{
+    FilterGraph *fg = av_mallocz(sizeof(*fg));
+
+    if (!fg)
+        exit_program(1);
+    fg->index = nb_filtergraphs;
+
+    fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
+                             fg->nb_outputs + 1);
+    if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
+        exit_program(1);
+    fg->outputs[0]->ost   = ost;
+    fg->outputs[0]->graph = fg;
+
+    fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
+                            fg->nb_inputs + 1);
+    if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
+        exit_program(1);
+    fg->inputs[0]->ist   = ist;
+    fg->inputs[0]->graph = fg;
+
+    ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
+                              &ist->nb_filters, ist->nb_filters + 1);
+    ist->filters[ist->nb_filters - 1] = fg->inputs[0];
+
+    filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
+                              &nb_filtergraphs, nb_filtergraphs + 1);
+    filtergraphs[nb_filtergraphs - 1] = fg;
+
+    return fg;
+}
+
+static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
+{
+    InputStream *ist;
+    enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
+    int i;
+
+    // TODO: support other filter types
+    if (type != AVMEDIA_TYPE_VIDEO) {
+        av_log(NULL, AV_LOG_FATAL, "Only video filters supported currently.\n");
+        exit_program(1);
+    }
+
+    if (in->name) {
+        AVFormatContext *s;
+        AVStream       *st = NULL;
+        char *p;
+        int file_idx = strtol(in->name, &p, 0);
+
+        if (file_idx < 0 || file_idx >= nb_input_files) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
+                   file_idx, fg->graph_desc);
+            exit_program(1);
+        }
+        s = input_files[file_idx]->ctx;
+
+        for (i = 0; i < s->nb_streams; i++) {
+            if (s->streams[i]->codec->codec_type != type)
+                continue;
+            if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
+                st = s->streams[i];
+                break;
+            }
+        }
+        if (!st) {
+            av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
+                   "matches no streams.\n", p, fg->graph_desc);
+            exit_program(1);
+        }
+        ist = input_streams[input_files[file_idx]->ist_index + st->index];
+    } else {
+        /* find the first unused stream of corresponding type */
+        for (i = 0; i < nb_input_streams; i++) {
+            ist = input_streams[i];
+            if (ist->st->codec->codec_type == type && ist->discard)
+                break;
+        }
+        if (i == nb_input_streams) {
+            av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
+                   "unlabeled input pad %d on filter %s", in->pad_idx,
+                   in->filter_ctx->name);
+            exit_program(1);
+        }
+    }
+    ist->discard         = 0;
+    ist->decoding_needed = 1;
+    ist->st->discard = AVDISCARD_NONE;
+
+    fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
+                            &fg->nb_inputs, fg->nb_inputs + 1);
+    if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
+        exit_program(1);
+    fg->inputs[fg->nb_inputs - 1]->ist   = ist;
+    fg->inputs[fg->nb_inputs - 1]->graph = fg;
+
+    ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
+                              &ist->nb_filters, ist->nb_filters + 1);
+    ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
+}
+
+static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+    char *pix_fmts;
+    AVCodecContext *codec = ofilter->ost->st->codec;
+    AVFilterContext *last_filter = out->filter_ctx;
+    int pad_idx = out->pad_idx;
+    int ret;
+
+
+    ret = avfilter_graph_create_filter(&ofilter->filter,
+                                       avfilter_get_by_name("buffersink"),
+                                       "out", NULL, pix_fmts, fg->graph);
+    if (ret < 0)
+        return ret;
+
+    if (codec->width || codec->height) {
+        char args[255];
+        AVFilterContext *filter;
+
+        snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
+                 codec->width,
+                 codec->height,
+                 (unsigned)ofilter->ost->sws_flags);
+        if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
+                                                NULL, args, NULL, fg->graph)) < 0)
+            return ret;
+        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
+            return ret;
+
+        last_filter = filter;
+        pad_idx = 0;
+    }
+
+    if ((pix_fmts = choose_pixel_fmts(ofilter->ost))) {
+        AVFilterContext *filter;
+        if ((ret = avfilter_graph_create_filter(&filter,
+                                                avfilter_get_by_name("format"),
+                                                "format", pix_fmts, NULL,
+                                                fg->graph)) < 0)
+            return ret;
+        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
             return ret;
+
+        last_filter = filter;
+        pad_idx     = 0;
+        av_freep(&pix_fmts);
     }
 
-    if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
+    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
         return ret;
 
-    codec->width  = ost->output_video_filter->inputs[0]->w;
-    codec->height = ost->output_video_filter->inputs[0]->h;
-    codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
-        ost->frame_aspect_ratio ? // overridden by the -aspect cli option
-        av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
-        ost->output_video_filter->inputs[0]->sample_aspect_ratio;
-    codec->pix_fmt = ost->output_video_filter->inputs[0]->format;
+    return 0;
+}
+
+static int configure_complex_filter(FilterGraph *fg)
+{
+    AVFilterInOut *inputs, *outputs, *cur;
+    int ret, i, init = !fg->graph;
+
+    avfilter_graph_free(&fg->graph);
+    if (!(fg->graph = avfilter_graph_alloc()))
+        return AVERROR(ENOMEM);
+
+    if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
+        return ret;
+
+    for (cur = inputs; init && cur; cur = cur->next)
+        init_input_filter(fg, cur);
+
+    for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
+        InputFilter *ifilter = fg->inputs[i];
+        InputStream     *ist = ifilter->ist;
+        AVRational       sar;
+        char            args[255];
+
+        sar = ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
+                                                 ist->st->codec->sample_aspect_ratio;
+        snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
+                 ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
+                 sar.num, sar.den);
+
+        if ((ret = avfilter_graph_create_filter(&ifilter->filter,
+                                                avfilter_get_by_name("buffer"), cur->name,
+                                                args, NULL, fg->graph)) < 0)
+            return ret;
+        if ((ret = avfilter_link(ifilter->filter, 0,
+                                 cur->filter_ctx, cur->pad_idx)) < 0)
+            return ret;
+    }
+    avfilter_inout_free(&inputs);
+
+    if (!init) {
+        /* we already know the mappings between lavfi outputs and output streams,
+         * so we can finish the setup */
+        for (cur = outputs, i = 0; cur; cur = cur->next, i++)
+            configure_output_filter(fg, fg->outputs[i], cur);
+        avfilter_inout_free(&outputs);
+
+        if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
+            return ret;
+    } else {
+        /* wait until output mappings are processed */
+        for (cur = outputs; cur;) {
+            fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
+                                     &fg->nb_outputs, fg->nb_outputs + 1);
+            if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
+                exit_program(1);
+            fg->outputs[fg->nb_outputs - 1]->graph   = fg;
+            fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
+            cur = cur->next;
+            fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
+        }
+    }
 
     return 0;
 }
 
+static int configure_complex_filters(void)
+{
+    int i, ret = 0;
+
+    for (i = 0; i < nb_filtergraphs; i++)
+        if (!filtergraphs[i]->graph &&
+            (ret = configure_complex_filter(filtergraphs[i])) < 0)
+            return ret;
+    return 0;
+}
+
+static int configure_filtergraph(FilterGraph *fg)
+{
+    return fg->graph_desc ? configure_complex_filter(fg) : configure_video_filters(fg);
+}
+
+static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
+{
+    int i;
+    for (i = 0; i < fg->nb_inputs; i++)
+        if (fg->inputs[i]->ist == ist)
+            return 1;
+    return 0;
+}
+
 static void term_exit(void)
 {
     av_log(NULL, AV_LOG_QUIET, "");
@@ -672,7 +977,19 @@ static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
 
 void exit_program(int ret)
 {
-    int i;
+    int i, j;
+
+    for (i = 0; i < nb_filtergraphs; i++) {
+        avfilter_graph_free(&filtergraphs[i]->graph);
+        for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
+            av_freep(&filtergraphs[i]->inputs[j]);
+        av_freep(&filtergraphs[i]->inputs);
+        for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
+            av_freep(&filtergraphs[i]->outputs[j]);
+        av_freep(&filtergraphs[i]->outputs);
+        av_freep(&filtergraphs[i]);
+    }
+    av_freep(&filtergraphs);
 
     /* close files */
     for (i = 0; i < nb_output_files; i++) {
@@ -711,6 +1028,7 @@ void exit_program(int ret)
         av_freep(&input_streams[i]->decoded_frame);
         av_dict_free(&input_streams[i]->opts);
         free_buffer_pool(input_streams[i]);
+        av_freep(&input_streams[i]->filters);
         av_freep(&input_streams[i]);
     }
 
@@ -917,6 +1235,58 @@ static int check_recording_time(OutputStream *ost)
     return 1;
 }
 
+static void get_default_channel_layouts(OutputStream *ost, InputStream *ist)
+{
+    char layout_name[256];
+    AVCodecContext *enc = ost->st->codec;
+    AVCodecContext *dec = ist->st->codec;
+
+    if (dec->channel_layout &&
+        av_get_channel_layout_nb_channels(dec->channel_layout) != dec->channels) {
+        av_get_channel_layout_string(layout_name, sizeof(layout_name),
+                                     dec->channels, dec->channel_layout);
+        av_log(NULL, AV_LOG_ERROR, "New channel layout (%s) is invalid\n",
+               layout_name);
+        dec->channel_layout = 0;
+    }
+    if (!dec->channel_layout) {
+        if (enc->channel_layout && dec->channels == enc->channels) {
+            dec->channel_layout = enc->channel_layout;
+        } else {
+            dec->channel_layout = av_get_default_channel_layout(dec->channels);
+
+            if (!dec->channel_layout) {
+                av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
+                       "layout for Input Stream #%d.%d\n", ist->file_index,
+                       ist->st->index);
+                exit_program(1);
+            }
+        }
+        av_get_channel_layout_string(layout_name, sizeof(layout_name),
+                                     dec->channels, dec->channel_layout);
+        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
+               "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
+    }
+    if (!enc->channel_layout) {
+        if (dec->channels == enc->channels) {
+            enc->channel_layout = dec->channel_layout;
+            return;
+        } else {
+            enc->channel_layout = av_get_default_channel_layout(enc->channels);
+        }
+        if (!enc->channel_layout) {
+            av_log(NULL, AV_LOG_FATAL, "Unable to find default channel layout "
+                   "for Output Stream #%d.%d\n", ost->file_index,
+                   ost->st->index);
+            exit_program(1);
+        }
+        av_get_channel_layout_string(layout_name, sizeof(layout_name),
+                                     enc->channels, enc->channel_layout);
+        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Output Stream "
+               "#%d.%d : %s\n", ost->file_index, ost->st->index, layout_name);
+    }
+}
+
 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
 {
     int fill_char = 0x00;
@@ -988,7 +1358,7 @@ static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
 }
 
 static int alloc_audio_output_buf(AVCodecContext *dec, AVCodecContext *enc,
-                                  int nb_samples)
+                                  int nb_samples, int *buf_linesize)
 {
     int64_t audio_buf_samples;
     int audio_buf_size;
@@ -1001,7 +1371,7 @@ static int alloc_audio_output_buf(AVCodecContext *dec, AVCodecContext *enc,
     if (audio_buf_samples > INT_MAX)
         return AVERROR(EINVAL);
 
-    audio_buf_size = av_samples_get_buffer_size(NULL, enc->channels,
+    audio_buf_size = av_samples_get_buffer_size(buf_linesize, enc->channels,
                                                 audio_buf_samples,
                                                 enc->sample_fmt, 0);
     if (audio_buf_size < 0)
@@ -1019,75 +1389,88 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 {
     uint8_t *buftmp;
 
-    int size_out, frame_bytes, resample_changed;
+    int size_out, frame_bytes, resample_changed, ret;
     AVCodecContext *enc = ost->st->codec;
     AVCodecContext *dec = ist->st->codec;
     int osize = av_get_bytes_per_sample(enc->sample_fmt);
     int isize = av_get_bytes_per_sample(dec->sample_fmt);
     uint8_t *buf = decoded_frame->data[0];
     int size     = decoded_frame->nb_samples * dec->channels * isize;
+    int out_linesize = 0;
+    int buf_linesize = decoded_frame->linesize[0];
+
+    get_default_channel_layouts(ost, ist);
 
-    if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples) < 0) {
+    if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples, &out_linesize) < 0) {
         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
         exit_program(1);
     }
 
-    if (enc->channels != dec->channels || enc->sample_rate != dec->sample_rate)
+    if (audio_sync_method > 1                      ||
+        enc->channels       != dec->channels       ||
+        enc->channel_layout != dec->channel_layout ||
+        enc->sample_rate    != dec->sample_rate    ||
+        dec->sample_fmt     != enc->sample_fmt)
         ost->audio_resample = 1;
 
     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
                        ost->resample_channels    != dec->channels   ||
+                       ost->resample_channel_layout != dec->channel_layout ||
                        ost->resample_sample_rate != dec->sample_rate;
 
-    if ((ost->audio_resample && !ost->resample) || resample_changed) {
+    if ((ost->audio_resample && !ost->avr) || resample_changed) {
         if (resample_changed) {
-            av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
+            av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:0x%"PRIx64" to rate:%d fmt:%s ch:%d chl:0x%"PRIx64"\n",
                    ist->file_index, ist->st->index,
-                   ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
-                   dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
+                   ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt),
+                   ost->resample_channels, ost->resample_channel_layout,
+                   dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt),
+                   dec->channels, dec->channel_layout);
             ost->resample_sample_fmt  = dec->sample_fmt;
             ost->resample_channels    = dec->channels;
+            ost->resample_channel_layout = dec->channel_layout;
             ost->resample_sample_rate = dec->sample_rate;
-            if (ost->resample)
-                audio_resample_close(ost->resample);
+            if (ost->avr)
+                avresample_close(ost->avr);
         }
         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
         if (audio_sync_method <= 1 &&
             ost->resample_sample_fmt  == enc->sample_fmt &&
             ost->resample_channels    == enc->channels   &&
+            ost->resample_channel_layout == enc->channel_layout &&
             ost->resample_sample_rate == enc->sample_rate) {
-            ost->resample = NULL;
             ost->audio_resample = 0;
         } else if (ost->audio_resample) {
-            if (dec->sample_fmt != AV_SAMPLE_FMT_S16)
-                av_log(NULL, AV_LOG_WARNING, "Using s16 intermediate sample format for resampling\n");
-            ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
-                                                   enc->sample_rate, dec->sample_rate,
-                                                   enc->sample_fmt,  dec->sample_fmt,
-                                                   16, 10, 0, 0.8);
-            if (!ost->resample) {
-                av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
-                       dec->channels, dec->sample_rate,
-                       enc->channels, enc->sample_rate);
-                exit_program(1);
+            if (!ost->avr) {
+                ost->avr = avresample_alloc_context();
+                if (!ost->avr) {
+                    av_log(NULL, AV_LOG_FATAL, "Error allocating context for libavresample\n");
+                    exit_program(1);
+                }
             }
-        }
-    }
 
-#define MAKE_SFMT_PAIR(a,b) ((a)+AV_SAMPLE_FMT_NB*(b))
-    if (!ost->audio_resample && dec->sample_fmt != enc->sample_fmt &&
-        MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt) != ost->reformat_pair) {
-        if (ost->reformat_ctx)
-            av_audio_convert_free(ost->reformat_ctx);
-        ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
-                                                   dec->sample_fmt, 1, NULL, 0);
-        if (!ost->reformat_ctx) {
-            av_log(NULL, AV_LOG_FATAL, "Cannot convert %s sample format to %s sample format\n",
-                   av_get_sample_fmt_name(dec->sample_fmt),
-                   av_get_sample_fmt_name(enc->sample_fmt));
-            exit_program(1);
+            av_opt_set_int(ost->avr, "in_channel_layout",  dec->channel_layout, 0);
+            av_opt_set_int(ost->avr, "in_sample_fmt",      dec->sample_fmt,     0);
+            av_opt_set_int(ost->avr, "in_sample_rate",     dec->sample_rate,    0);
+            av_opt_set_int(ost->avr, "out_channel_layout", enc->channel_layout, 0);
+            av_opt_set_int(ost->avr, "out_sample_fmt",     enc->sample_fmt,     0);
+            av_opt_set_int(ost->avr, "out_sample_rate",    enc->sample_rate,    0);
+            if (audio_sync_method > 1)
+                av_opt_set_int(ost->avr, "force_resampling", 1, 0);
+
+            /* if both the input and output formats are s16 or u8, use s16 as
+               the internal sample format */
+            if (av_get_bytes_per_sample(dec->sample_fmt) <= 2 &&
+                av_get_bytes_per_sample(enc->sample_fmt) <= 2) {
+                av_opt_set_int(ost->avr, "internal_sample_fmt", AV_SAMPLE_FMT_S16P, 0);
+            }
+
+            ret = avresample_open(ost->avr);
+            if (ret < 0) {
+                av_log(NULL, AV_LOG_FATAL, "Error opening libavresample\n");
+                exit_program(1);
+            }
         }
-        ost->reformat_pair = MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
     }
 
     if (audio_sync_method > 0) {
@@ -1116,7 +1499,7 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
                         exit_program(1);
                     }
 
-                    if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples + idelta) < 0) {
+                    if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples + idelta, &out_linesize) < 0) {
                         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
                         exit_program(1);
                     }
@@ -1126,15 +1509,15 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
                     memcpy(async_buf + byte_delta, buf, size);
                     buf = async_buf;
                     size += byte_delta;
+                    buf_linesize = allocated_async_buf_size;
                     av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", idelta);
                 }
             } else if (audio_sync_method > 1) {
                 int comp = av_clip(delta, -audio_sync_method, audio_sync_method);
-                av_assert0(ost->audio_resample);
                 av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
                        delta, comp, enc->sample_rate);
 //                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
-                av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
+                avresample_set_compensation(ost->avr, comp, enc->sample_rate);
             }
         }
     } else if (audio_sync_method == 0)
@@ -1143,31 +1526,16 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 
     if (ost->audio_resample) {
         buftmp = audio_buf;
-        size_out = audio_resample(ost->resample,
-                                  (short *)buftmp, (short *)buf,
-                                  size / (dec->channels * isize));
+        size_out = avresample_convert(ost->avr, (void **)&buftmp,
+                                      allocated_audio_buf_size, out_linesize,
+                                      (void **)&buf, buf_linesize,
+                                      size / (dec->channels * isize));
         size_out = size_out * enc->channels * osize;
     } else {
         buftmp = buf;
         size_out = size;
     }
 
-    if (!ost->audio_resample && dec->sample_fmt != enc->sample_fmt) {
-        const void *ibuf[6] = { buftmp };
-        void *obuf[6]  = { audio_buf };
-        int istride[6] = { isize };
-        int ostride[6] = { osize };
-        int len = size_out / istride[0];
-        if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len) < 0) {
-            printf("av_audio_convert() failed\n");
-            if (exit_on_error)
-                exit_program(1);
-            return;
-        }
-        buftmp = audio_buf;
-        size_out = len * osize;
-    }
-
     /* now encode as many frames as possible */
     if (!(enc->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
         /* output resampled raw samples */
@@ -1474,6 +1842,57 @@ static void do_video_stats(AVFormatContext *os, OutputStream *ost,
     }
 }
 
+/* check for new output on any of the filtergraphs */
+static int poll_filters(void)
+{
+    AVFilterBufferRef *picref;
+    AVFrame *filtered_frame = NULL;
+    int i, frame_size;
+
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+        OutputFile    *of = output_files[ost->file_index];
+
+        if (!ost->filter || ost->is_past_recording_time)
+            continue;
+
+        if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
+            return AVERROR(ENOMEM);
+        } else
+            avcodec_get_frame_defaults(ost->filtered_frame);
+        filtered_frame = ost->filtered_frame;
+
+        while (av_buffersink_read(ost->filter->filter, &picref) >= 0) {
+            avfilter_copy_buf_props(filtered_frame, picref);
+            filtered_frame->pts = av_rescale_q(picref->pts,
+                                               ost->filter->filter->inputs[0]->time_base,
+                                               AV_TIME_BASE_Q);
+
+            if (of->start_time && filtered_frame->pts < of->start_time)
+                return 0;
+
+            switch (ost->filter->filter->inputs[0]->type) {
+            case AVMEDIA_TYPE_VIDEO:
+                if (!ost->frame_aspect_ratio)
+                    ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
+
+                do_video_out(of->ctx, ost, filtered_frame, &frame_size,
+                             same_quant ? ost->last_quality :
+                                          ost->st->codec->global_quality);
+                if (vstats_filename && frame_size)
+                    do_video_stats(of->ctx, ost, frame_size);
+                break;
+            default:
+                // TODO support audio/subtitle filters
+                av_assert0(0);
+            }
+
+            avfilter_unref_buffer(picref);
+        }
+    }
+    return 0;
+}
+
 static void print_report(int is_last_report, int64_t timer_start)
 {
     char buf[1024];
@@ -1629,14 +2048,6 @@ static void flush_encoders(void)
 
                     av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
 
-                    /* pad last frame with silence if needed */
-                    if (!(enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME)) {
-                        frame_bytes = enc->frame_size * enc->channels *
-                                      av_get_bytes_per_sample(enc->sample_fmt);
-                        if (allocated_audio_buf_size < frame_bytes)
-                            exit_program(1);
-                        generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
-                    }
                     encode_audio_frame(os, ost, audio_buf, frame_bytes);
                 } else {
                     /* flush encoder with NULL frames until it is done
@@ -1867,11 +2278,10 @@ static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
 
 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
 {
-    AVFrame *decoded_frame, *filtered_frame = NULL;
+    AVFrame *decoded_frame;
     void *buffer_to_free = NULL;
     int i, ret = 0, resample_changed;
     float quality;
-    int frame_available = 1;
 
     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
         return AVERROR(ENOMEM);
@@ -1890,6 +2300,9 @@ static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int
     quality = same_quant ? decoded_frame->quality : 0;
     if (!*got_output) {
         /* no picture yet */
+        if (!pkt->size)
+            for (i = 0; i < ist->nb_filters; i++)
+                av_buffersrc_buffer(ist->filters[i]->filter, NULL);
         return ret;
     }
     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
@@ -1915,22 +2328,19 @@ static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int
         ist->resample_width   = decoded_frame->width;
         ist->resample_height  = decoded_frame->height;
         ist->resample_pix_fmt = decoded_frame->format;
-    }
 
-    for (i = 0; i < nb_output_streams; i++) {
-        OutputStream *ost = output_streams[i];
-        int frame_size;
-
-        if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
-            continue;
-
-        if (resample_changed) {
-            avfilter_graph_free(&ost->graph);
-            if (configure_video_filters(ist, ost)) {
+        for (i = 0; i < nb_filtergraphs; i++)
+            if (ist_in_filtergraph(filtergraphs[i], ist) &&
+                configure_filtergraph(filtergraphs[i]) < 0) {
                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
                 exit_program(1);
             }
-        }
+    }
+
+    for (i = 0; i < ist->nb_filters; i++) {
+        // XXX what an ugly hack
+        if (ist->filters[i]->graph->nb_outputs == 1)
+            ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
 
         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
             FrameBuffer      *buf = decoded_frame->opaque;
@@ -1945,40 +2355,12 @@ static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int
             fb->buf->free           = filter_release_buffer;
 
             buf->refcount++;
-            av_buffersrc_buffer(ost->input_video_filter, fb);
+            av_buffersrc_buffer(ist->filters[i]->filter, fb);
         } else
-            av_vsrc_buffer_add_frame(ost->input_video_filter, decoded_frame,
+            av_vsrc_buffer_add_frame(ist->filters[i]->filter, decoded_frame,
                                      decoded_frame->pts, decoded_frame->sample_aspect_ratio);
-
-        if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
-            ret = AVERROR(ENOMEM);
-            goto fail;
-        } else
-            avcodec_get_frame_defaults(ost->filtered_frame);
-        filtered_frame = ost->filtered_frame;
-
-        frame_available = avfilter_poll_frame(ost->output_video_filter->inputs[0]);
-        while (frame_available) {
-            AVFilterBufferRef *picref;
-            AVRational ist_pts_tb;
-            if ((ret = get_filtered_video_frame(ost->output_video_filter,
-                                                filtered_frame, &picref,
-                                                &ist_pts_tb)) < 0)
-                goto fail;
-            filtered_frame->pts = av_rescale_q(picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
-            if (!ost->frame_aspect_ratio)
-                ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
-
-            do_video_out(output_files[ost->file_index]->ctx, ost, filtered_frame, &frame_size,
-                         same_quant ? quality : ost->st->codec->global_quality);
-            if (vstats_filename && frame_size)
-                do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
-            frame_available = ost->output_video_filter && avfilter_poll_frame(ost->output_video_filter->inputs[0]);
-            avfilter_unref_buffer(picref);
-        }
     }
 
-fail:
     av_free(buffer_to_free);
     return ret;
 }
@@ -2132,51 +2514,6 @@ static void print_sdp(void)
     av_freep(&avc);
 }
 
-static void get_default_channel_layouts(OutputStream *ost, InputStream *ist)
-{
-    char layout_name[256];
-    AVCodecContext *enc = ost->st->codec;
-    AVCodecContext *dec = ist->st->codec;
-
-    if (!dec->channel_layout) {
-        if (enc->channel_layout && dec->channels == enc->channels) {
-            dec->channel_layout = enc->channel_layout;
-        } else {
-            dec->channel_layout = av_get_default_channel_layout(dec->channels);
-
-            if (!dec->channel_layout) {
-                av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
-                       "layout for Input Stream #%d.%d\n", ist->file_index,
-                       ist->st->index);
-                exit_program(1);
-            }
-        }
-        av_get_channel_layout_string(layout_name, sizeof(layout_name),
-                                     dec->channels, dec->channel_layout);
-        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
-               "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
-    }
-    if (!enc->channel_layout) {
-        if (dec->channels == enc->channels) {
-            enc->channel_layout = dec->channel_layout;
-            return;
-        } else {
-            enc->channel_layout = av_get_default_channel_layout(enc->channels);
-        }
-        if (!enc->channel_layout) {
-            av_log(NULL, AV_LOG_FATAL, "Unable to find default channel layout "
-                   "for Output Stream #%d.%d\n", ost->file_index,
-                   ost->st->index);
-            exit_program(1);
-        }
-        av_get_channel_layout_string(layout_name, sizeof(layout_name),
-                                     enc->channels, enc->channel_layout);
-        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Output Stream "
-               "#%d.%d : %s\n", ost->file_index, ost->st->index, layout_name);
-    }
-}
-
-
 static int init_input_stream(int ist_index, char *error, int error_len)
 {
     int i;
@@ -2235,6 +2572,23 @@ static int init_input_stream(int ist_index, char *error, int error_len)
     return 0;
 }
 
+static InputStream *get_input_stream(OutputStream *ost)
+{
+    if (ost->source_index >= 0)
+        return input_streams[ost->source_index];
+
+    if (ost->filter) {
+        FilterGraph *fg = ost->filter->graph;
+        int i;
+
+        for (i = 0; i < fg->nb_inputs; i++)
+            if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
+                return fg->inputs[i]->ist;
+    }
+
+    return NULL;
+}
+
 static int transcode_init(void)
 {
     int ret = 0, i, j, k;
@@ -2263,24 +2617,36 @@ static int transcode_init(void)
         }
     }
 
+    /* init complex filtergraphs */
+    for (i = 0; i < nb_filtergraphs; i++)
+        if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
+            return ret;
+
     /* for each output stream, we compute the right encoding parameters */
     for (i = 0; i < nb_output_streams; i++) {
         ost = output_streams[i];
         oc  = output_files[ost->file_index]->ctx;
-        ist = input_streams[ost->source_index];
+        ist = get_input_stream(ost);
 
         if (ost->attachment_filename)
             continue;
 
         codec  = ost->st->codec;
-        icodec = ist->st->codec;
 
-        ost->st->disposition          = ist->st->disposition;
-        codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
-        codec->chroma_sample_location = icodec->chroma_sample_location;
+        if (ist) {
+            icodec = ist->st->codec;
+
+            ost->st->disposition          = ist->st->disposition;
+            codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
+            codec->chroma_sample_location = icodec->chroma_sample_location;
+        }
 
         if (ost->stream_copy) {
-            uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
+            uint64_t extra_size;
+
+            av_assert0(ist && !ost->filter);
+
+            extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
 
             if (extra_size > INT_MAX) {
                 return AVERROR(EINVAL);
@@ -2352,10 +2718,19 @@ static int transcode_init(void)
                 abort();
             }
         } else {
-            if (!ost->enc)
-                ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
+            if (!ost->enc) {
+                /* should only happen when a default codec is not present. */
+                snprintf(error, sizeof(error), "Automatic encoder selection "
+                         "failed for output stream #%d:%d. Default encoder for "
+                         "format %s is probably disabled. Please choose an "
+                         "encoder manually.\n", ost->file_index, ost->index,
+                         oc->oformat->name);
+                ret = AVERROR(EINVAL);
+                goto dump_format;
+            }
 
-            ist->decoding_needed = 1;
+            if (ist)
+                ist->decoding_needed = 1;
             ost->encoding_needed = 1;
 
             switch (codec->codec_type) {
@@ -2364,7 +2739,6 @@ static int transcode_init(void)
                 if (!ost->fifo) {
                     return AVERROR(ENOMEM);
                 }
-                ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);
 
                 if (!codec->sample_rate)
                     codec->sample_rate = icodec->sample_rate;
@@ -2377,17 +2751,27 @@ static int transcode_init(void)
 
                 if (!codec->channels)
                     codec->channels = icodec->channels;
-                codec->channel_layout = icodec->channel_layout;
+                if (!codec->channel_layout)
+                    codec->channel_layout = icodec->channel_layout;
                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
                     codec->channel_layout = 0;
 
-                ost->audio_resample       = codec-> sample_rate != icodec->sample_rate || audio_sync_method > 1;
                 icodec->request_channels  = codec-> channels;
                 ost->resample_sample_fmt  = icodec->sample_fmt;
                 ost->resample_sample_rate = icodec->sample_rate;
                 ost->resample_channels    = icodec->channels;
+                ost->resample_channel_layout = icodec->channel_layout;
                 break;
             case AVMEDIA_TYPE_VIDEO:
+                if (!ost->filter) {
+                    FilterGraph *fg;
+                    fg = init_simple_filtergraph(ist, ost);
+                    if (configure_video_filters(fg)) {
+                        av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
+                        exit(1);
+                    }
+                }
+
                 /*
                  * We want CFR output if and only if one of those is true:
                  * 1) user specified output framerate with -r
@@ -2397,7 +2781,7 @@ static int transcode_init(void)
                  *
                  * in such a case, set ost->frame_rate
                  */
-                if (!ost->frame_rate.num &&
+                if (!ost->frame_rate.num && ist &&
                     (video_sync_method ==  VSYNC_CFR ||
                      (video_sync_method ==  VSYNC_AUTO &&
                       !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
@@ -2410,13 +2794,18 @@ static int transcode_init(void)
                 if (ost->frame_rate.num) {
                     codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
                     video_sync_method = VSYNC_CFR;
-                } else
+                } else if (ist)
                     codec->time_base = ist->st->time_base;
+                else
+                    codec->time_base = ost->filter->filter->inputs[0]->time_base;
 
-                if (configure_video_filters(ist, ost)) {
-                    av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
-                    exit(1);
-                }
+                codec->width  = ost->filter->filter->inputs[0]->w;
+                codec->height = ost->filter->filter->inputs[0]->h;
+                codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
+                    ost->frame_aspect_ratio ? // overridden by the -aspect cli option
+                    av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
+                    ost->filter->filter->inputs[0]->sample_aspect_ratio;
+                codec->pix_fmt = ost->filter->filter->inputs[0]->format;
 
                 if (codec->width   != icodec->width  ||
                     codec->height  != icodec->height ||
@@ -2471,14 +2860,11 @@ static int transcode_init(void)
         ost = output_streams[i];
         if (ost->encoding_needed) {
             AVCodec      *codec = ost->enc;
-            AVCodecContext *dec = input_streams[ost->source_index]->st->codec;
-            if (!codec) {
-                snprintf(error, sizeof(error), "Encoder (codec id %d) not found for output stream #%d:%d",
-                         ost->st->codec->codec_id, ost->file_index, ost->index);
-                ret = AVERROR(EINVAL);
-                goto dump_format;
-            }
-            if (dec->subtitle_header) {
+            AVCodecContext *dec = NULL;
+
+            if ((ist = get_input_stream(ost)))
+                dec = ist->st->codec;
+            if (dec && dec->subtitle_header) {
                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
                 if (!ost->st->codec->subtitle_header) {
                     ret = AVERROR(ENOMEM);
@@ -2552,6 +2938,24 @@ static int transcode_init(void)
 
     /* dump the stream mapping */
     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
+    for (i = 0; i < nb_input_streams; i++) {
+        ist = input_streams[i];
+
+        for (j = 0; j < ist->nb_filters; j++) {
+            AVFilterLink *link = ist->filters[j]->filter->outputs[0];
+            if (ist->filters[j]->graph->graph_desc) {
+                av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
+                       ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
+                       link->dst->filter->name);
+                if (link->dst->input_count > 1)
+                    av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
+                if (nb_filtergraphs > 1)
+                    av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
+                av_log(NULL, AV_LOG_INFO, "\n");
+            }
+        }
+    }
+
     for (i = 0; i < nb_output_streams; i++) {
         ost = output_streams[i];
 
@@ -2561,6 +2965,21 @@ static int transcode_init(void)
                    ost->attachment_filename, ost->file_index, ost->index);
             continue;
         }
+
+        if (ost->filter && ost->filter->graph->graph_desc) {
+            /* output from a complex graph */
+            AVFilterLink *link = ost->filter->filter->inputs[0];
+            av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
+            if (link->src->output_count > 1)
+                av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
+            if (nb_filtergraphs > 1)
+                av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
+
+            av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
+                   ost->index, ost->enc ? ost->enc->name : "?");
+            continue;
+        }
+
         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
                input_streams[ost->source_index]->file_index,
                input_streams[ost->source_index]->st->index,
@@ -2617,47 +3036,47 @@ static int transcode(void)
     timer_start = av_gettime();
 
     for (; received_sigterm == 0;) {
-        int file_index, ist_index;
+        int file_index, ist_index, past_recording_time = 1;
         AVPacket pkt;
         int64_t ipts_min;
-        double opts_min;
 
         ipts_min = INT64_MAX;
-        opts_min = 1e100;
 
-        /* select the stream that we must read now by looking at the
-           smallest output pts */
-        file_index = -1;
+        /* check if there's any stream where output is still needed */
         for (i = 0; i < nb_output_streams; i++) {
             OutputFile *of;
-            int64_t ipts;
-            double  opts;
             ost = output_streams[i];
-            of = output_files[ost->file_index];
-            os = output_files[ost->file_index]->ctx;
-            ist = input_streams[ost->source_index];
-            if (ost->is_past_recording_time || no_packet[ist->file_index] ||
+            of  = output_files[ost->file_index];
+            os  = output_files[ost->file_index]->ctx;
+            if (ost->is_past_recording_time ||
                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
                 continue;
-            opts = ost->st->pts.val * av_q2d(ost->st->time_base);
+            if (ost->frame_number > ost->max_frames) {
+                int j;
+                for (j = 0; j < of->ctx->nb_streams; j++)
+                    output_streams[of->ost_index + j]->is_past_recording_time = 1;
+                continue;
+            }
+            past_recording_time = 0;
+        }
+        if (past_recording_time)
+            break;
+
+        /* select the stream that we must read now by looking at the
+           smallest output pts */
+        file_index = -1;
+        for (i = 0; i < nb_input_streams; i++) {
+            int64_t ipts;
+            ist = input_streams[i];
             ipts = ist->last_dts;
+            if (ist->discard || no_packet[ist->file_index])
+                continue;
             if (!input_files[ist->file_index]->eof_reached) {
                 if (ipts < ipts_min) {
                     ipts_min = ipts;
-                    if (input_sync)
-                        file_index = ist->file_index;
-                }
-                if (opts < opts_min) {
-                    opts_min = opts;
-                    if (!input_sync) file_index = ist->file_index;
+                    file_index = ist->file_index;
                 }
             }
-            if (ost->frame_number >= ost->max_frames) {
-                int j;
-                for (j = 0; j < of->ctx->nb_streams; j++)
-                    output_streams[of->ost_index + j]->is_past_recording_time = 1;
-                continue;
-            }
         }
         /* if none, if is finished */
         if (file_index < 0) {
@@ -2680,6 +3099,13 @@ static int transcode(void)
         }
         if (ret < 0) {
             input_files[file_index]->eof_reached = 1;
+
+            for (i = 0; i < input_files[file_index]->nb_streams; i++) {
+                ist = input_streams[input_files[file_index]->ist_index + i];
+                if (ist->decoding_needed)
+                    output_packet(ist, NULL);
+            }
+
             if (opt_shortest)
                 break;
             else
@@ -2732,8 +3158,7 @@ static int transcode(void)
         }
 
         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
-        if (output_packet(ist, &pkt) < 0) {
-
+        if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
                    ist->file_index, ist->st->index);
             if (exit_on_error)
@@ -2752,10 +3177,11 @@ static int transcode(void)
     /* at the end of stream, we must flush the decoder buffers */
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
-        if (ist->decoding_needed) {
+        if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
             output_packet(ist, NULL);
         }
     }
+    poll_filters();
     flush_encoders();
 
     term_exit();
@@ -2776,7 +3202,6 @@ static int transcode(void)
             av_freep(&ost->st->codec->stats_in);
             avcodec_close(ost->st->codec);
         }
-        avfilter_graph_free(&ost->graph);
     }
 
     /* close each decoder */
@@ -2807,10 +3232,8 @@ static int transcode(void)
                                              initialized but set to zero */
                 av_freep(&ost->st->codec->subtitle_header);
                 av_free(ost->forced_kf_pts);
-                if (ost->resample)
-                    audio_resample_close(ost->resample);
-                if (ost->reformat_ctx)
-                    av_audio_convert_free(ost->reformat_ctx);
+                if (ost->avr)
+                    avresample_free(&ost->avr);
                 av_dict_free(&ost->opts);
             }
         }
@@ -2900,41 +3323,54 @@ static int opt_map(OptionsContext *o, const char *opt, const char *arg)
     }
 
 
-    file_idx = strtol(map, &p, 0);
-    if (file_idx >= nb_input_files || file_idx < 0) {
-        av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
-        exit_program(1);
-    }
-    if (negative)
-        /* disable some already defined maps */
-        for (i = 0; i < o->nb_stream_maps; i++) {
-            m = &o->stream_maps[i];
-            if (file_idx == m->file_index &&
-                check_stream_specifier(input_files[m->file_index]->ctx,
-                                       input_files[m->file_index]->ctx->streams[m->stream_index],
-                                       *p == ':' ? p + 1 : p) > 0)
-                m->disabled = 1;
+    if (map[0] == '[') {
+        /* this mapping refers to lavfi output */
+        const char *c = map + 1;
+        o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
+                                    &o->nb_stream_maps, o->nb_stream_maps + 1);
+        m = &o->stream_maps[o->nb_stream_maps - 1];
+        m->linklabel = av_get_token(&c, "]");
+        if (!m->linklabel) {
+            av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
+            exit_program(1);
         }
-    else
-        for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
-            if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
-                        *p == ':' ? p + 1 : p) <= 0)
-                continue;
-            o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
-                                        &o->nb_stream_maps, o->nb_stream_maps + 1);
-            m = &o->stream_maps[o->nb_stream_maps - 1];
-
-            m->file_index   = file_idx;
-            m->stream_index = i;
-
-            if (sync_file_idx >= 0) {
-                m->sync_file_index   = sync_file_idx;
-                m->sync_stream_index = sync_stream_idx;
-            } else {
-                m->sync_file_index   = file_idx;
-                m->sync_stream_index = i;
-            }
+    } else {
+        file_idx = strtol(map, &p, 0);
+        if (file_idx >= nb_input_files || file_idx < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
+            exit_program(1);
         }
+        if (negative)
+            /* disable some already defined maps */
+            for (i = 0; i < o->nb_stream_maps; i++) {
+                m = &o->stream_maps[i];
+                if (file_idx == m->file_index &&
+                    check_stream_specifier(input_files[m->file_index]->ctx,
+                                           input_files[m->file_index]->ctx->streams[m->stream_index],
+                                           *p == ':' ? p + 1 : p) > 0)
+                    m->disabled = 1;
+            }
+        else
+            for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
+                if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
+                            *p == ':' ? p + 1 : p) <= 0)
+                    continue;
+                o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
+                                            &o->nb_stream_maps, o->nb_stream_maps + 1);
+                m = &o->stream_maps[o->nb_stream_maps - 1];
+
+                m->file_index   = file_idx;
+                m->stream_index = i;
+
+                if (sync_file_idx >= 0) {
+                    m->sync_file_index   = sync_file_idx;
+                    m->sync_stream_index = sync_stream_idx;
+                } else {
+                    m->sync_file_index   = file_idx;
+                    m->sync_stream_index = i;
+                }
+            }
+    }
 
     if (!m) {
         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
@@ -3123,12 +3559,6 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
 
         switch (dec->codec_type) {
         case AVMEDIA_TYPE_VIDEO:
-            if (dec->lowres) {
-                dec->flags |= CODEC_FLAG_EMU_EDGE;
-                dec->height >>= dec->lowres;
-                dec->width  >>= dec->lowres;
-            }
-
             ist->resample_height  = dec->height;
             ist->resample_width   = dec->width;
             ist->resample_pix_fmt = dec->pix_fmt;
@@ -3234,8 +3664,16 @@ static int opt_input_file(OptionsContext *o, const char *opt, const char *filena
         av_dict_set(&format_opts, "sample_rate", buf, 0);
     }
     if (o->nb_audio_channels) {
-        snprintf(buf, sizeof(buf), "%d", o->audio_channels[o->nb_audio_channels - 1].u.i);
-        av_dict_set(&format_opts, "channels", buf, 0);
+        /* because we set audio_channels based on both the "ac" and
+         * "channel_layout" options, we need to check that the specified
+         * demuxer actually has the "channels" option before setting it */
+        if (file_iformat && file_iformat->priv_class &&
+            av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
+                        AV_OPT_SEARCH_FAKE_OBJ)) {
+            snprintf(buf, sizeof(buf), "%d",
+                     o->audio_channels[o->nb_audio_channels - 1].u.i);
+            av_dict_set(&format_opts, "channels", buf, 0);
+        }
     }
     if (o->nb_frame_rates) {
         av_dict_set(&format_opts, "framerate", o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
@@ -3772,15 +4210,50 @@ static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
     return 0;
 }
 
+static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
+                               AVFormatContext *oc)
+{
+    OutputStream *ost;
+
+    if (ofilter->out_tmp->filter_ctx->output_pads[ofilter->out_tmp->pad_idx].type != AVMEDIA_TYPE_VIDEO) {
+        av_log(NULL, AV_LOG_FATAL, "Only video filters are supported currently.\n");
+        exit_program(1);
+    }
+
+    ost               = new_video_stream(o, oc);
+    ost->source_index = -1;
+    ost->filter       = ofilter;
+
+    ofilter->ost      = ost;
+
+    if (ost->stream_copy) {
+        av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
+               "which is fed from a complex filtergraph. Filtering and streamcopy "
+               "cannot be used together.\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+
+    if (configure_output_filter(ofilter->graph, ofilter, ofilter->out_tmp) < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error configuring filter.\n");
+        exit_program(1);
+    }
+    avfilter_inout_free(&ofilter->out_tmp);
+}
+
 static void opt_output_file(void *optctx, const char *filename)
 {
     OptionsContext *o = optctx;
     AVFormatContext *oc;
-    int i, err;
+    int i, j, err;
     AVOutputFormat *file_oformat;
     OutputStream *ost;
     InputStream  *ist;
 
+    if (configure_complex_filters() < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error configuring filters.\n");
+        exit_program(1);
+    }
+
     if (!strcmp(filename, "-"))
         filename = "pipe:";
 
@@ -3809,6 +4282,24 @@ static void opt_output_file(void *optctx, const char *filename)
     oc->interrupt_callback = int_cb;
     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
 
+    /* create streams for all unlabeled output pads */
+    for (i = 0; i < nb_filtergraphs; i++) {
+        FilterGraph *fg = filtergraphs[i];
+        for (j = 0; j < fg->nb_outputs; j++) {
+            OutputFilter *ofilter = fg->outputs[j];
+
+            if (!ofilter->out_tmp || ofilter->out_tmp->name)
+                continue;
+
+            switch (ofilter->out_tmp->filter_ctx->output_pads[ofilter->out_tmp->pad_idx].type) {
+            case AVMEDIA_TYPE_VIDEO:    o->video_disable    = 1; break;
+            case AVMEDIA_TYPE_AUDIO:    o->audio_disable    = 1; break;
+            case AVMEDIA_TYPE_SUBTITLE: o->subtitle_disable = 1; break;
+            }
+            init_output_filter(ofilter, o, oc);
+        }
+    }
+
     if (!o->nb_stream_maps) {
         /* pick the "best" stream of each type */
 #define NEW_STREAM(type, index)\
@@ -3864,24 +4355,48 @@ static void opt_output_file(void *optctx, const char *filename)
             if (map->disabled)
                 continue;
 
-            ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
-            switch (ist->st->codec->codec_type) {
-            case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
-            case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
-            case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
-            case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
-            case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
-            default:
-                av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
-                       map->file_index, map->stream_index);
-                exit_program(1);
-            }
+            if (map->linklabel) {
+                FilterGraph *fg;
+                OutputFilter *ofilter = NULL;
+                int j, k;
+
+                for (j = 0; j < nb_filtergraphs; j++) {
+                    fg = filtergraphs[j];
+                    for (k = 0; k < fg->nb_outputs; k++) {
+                        AVFilterInOut *out = fg->outputs[k]->out_tmp;
+                        if (out && !strcmp(out->name, map->linklabel)) {
+                            ofilter = fg->outputs[k];
+                            goto loop_end;
+                        }
+                    }
+                }
+loop_end:
+                if (!ofilter) {
+                    av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
+                           "in any defined filter graph.\n", map->linklabel);
+                    exit_program(1);
+                }
+                init_output_filter(ofilter, o, oc);
+            } else {
+                ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
+                switch (ist->st->codec->codec_type) {
+                case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
+                case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
+                case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
+                case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
+                case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
+                default:
+                    av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
+                           map->file_index, map->stream_index);
+                    exit_program(1);
+                }
 
-            ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
-            ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
-                                           map->sync_stream_index];
-            ist->discard = 0;
-            ist->st->discard = AVDISCARD_NONE;
+                ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
+                ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
+                                               map->sync_stream_index];
+                ist->discard = 0;
+                ist->st->discard = AVDISCARD_NONE;
+            }
         }
     }
 
@@ -4356,53 +4871,10 @@ static int opt_deinterlace(const char *opt, const char *arg)
 
 static int opt_cpuflags(const char *opt, const char *arg)
 {
-#define CPUFLAG_MMX2     (AV_CPU_FLAG_MMX      | AV_CPU_FLAG_MMX2)
-#define CPUFLAG_3DNOW    (AV_CPU_FLAG_3DNOW    | AV_CPU_FLAG_MMX)
-#define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
-#define CPUFLAG_SSE      (AV_CPU_FLAG_SSE      | CPUFLAG_MMX2)
-#define CPUFLAG_SSE2     (AV_CPU_FLAG_SSE2     | CPUFLAG_SSE)
-#define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
-#define CPUFLAG_SSE3     (AV_CPU_FLAG_SSE3     | CPUFLAG_SSE2)
-#define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
-#define CPUFLAG_SSSE3    (AV_CPU_FLAG_SSSE3    | CPUFLAG_SSE3)
-#define CPUFLAG_SSE4     (AV_CPU_FLAG_SSE4     | CPUFLAG_SSSE3)
-#define CPUFLAG_SSE42    (AV_CPU_FLAG_SSE42    | CPUFLAG_SSE4)
-#define CPUFLAG_AVX      (AV_CPU_FLAG_AVX      | CPUFLAG_SSE42)
-#define CPUFLAG_XOP      (AV_CPU_FLAG_XOP      | CPUFLAG_AVX)
-#define CPUFLAG_FMA4     (AV_CPU_FLAG_FMA4     | CPUFLAG_AVX)
-    static const AVOption cpuflags_opts[] = {
-        { "flags"   , NULL, 0, AV_OPT_TYPE_FLAGS, { 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
-        { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ALTIVEC  },    .unit = "flags" },
-        { "mmx"     , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_MMX      },    .unit = "flags" },
-        { "mmx2"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_MMX2         },    .unit = "flags" },
-        { "sse"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE          },    .unit = "flags" },
-        { "sse2"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE2         },    .unit = "flags" },
-        { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE2SLOW     },    .unit = "flags" },
-        { "sse3"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE3         },    .unit = "flags" },
-        { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE3SLOW     },    .unit = "flags" },
-        { "ssse3"   , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSSE3        },    .unit = "flags" },
-        { "atom"    , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ATOM     },    .unit = "flags" },
-        { "sse4.1"  , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE4         },    .unit = "flags" },
-        { "sse4.2"  , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE42        },    .unit = "flags" },
-        { "avx"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_AVX          },    .unit = "flags" },
-        { "xop"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_XOP          },    .unit = "flags" },
-        { "fma4"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_FMA4         },    .unit = "flags" },
-        { "3dnow"   , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOW        },    .unit = "flags" },
-        { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOWEXT     },    .unit = "flags" },
-        { NULL },
-    };
-    static const AVClass class = {
-        .class_name = "cpuflags",
-        .item_name  = av_default_item_name,
-        .option     = cpuflags_opts,
-        .version    = LIBAVUTIL_VERSION_INT,
-    };
-
-    int flags = 0, ret;
-    const AVClass *pclass = &class;
-
-    if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], arg, &flags)) < 0)
-        return ret;
+    int flags = av_parse_cpu_flags(arg);
+
+    if (flags < 0)
+        return flags;
 
     av_set_cpu_flags_mask(flags);
     return 0;
@@ -4450,6 +4922,17 @@ static int opt_channel_layout(OptionsContext *o, const char *opt, const char *ar
     return ret;
 }
 
+static int opt_filter_complex(const char *opt, const char *arg)
+{
+    filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
+                              &nb_filtergraphs, nb_filtergraphs + 1);
+    if (!(filtergraphs[nb_filtergraphs - 1] = av_mallocz(sizeof(*filtergraphs[0]))))
+        return AVERROR(ENOMEM);
+    filtergraphs[nb_filtergraphs - 1]->index       = nb_filtergraphs - 1;
+    filtergraphs[nb_filtergraphs - 1]->graph_desc = arg;
+    return 0;
+}
+
 #define OFFSET(x) offsetof(OptionsContext, x)
 static const OptionDef options[] = {
     /* main options */
@@ -4494,6 +4977,7 @@ static const OptionDef options[] = {
     { "q", HAS_ARG | OPT_EXPERT | OPT_DOUBLE | OPT_SPEC, {.off = OFFSET(qscale)}, "use fixed quality scale (VBR)", "q" },
     { "qscale", HAS_ARG | OPT_EXPERT | OPT_DOUBLE | OPT_SPEC, {.off = OFFSET(qscale)}, "use fixed quality scale (VBR)", "q" },
     { "filter", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(filters)}, "set stream filterchain", "filter_list" },
+    { "filter_complex", HAS_ARG | OPT_EXPERT, {(void*)opt_filter_complex}, "create a complex filtergraph", "graph_description" },
     { "stats", OPT_BOOL, {&print_stats}, "print progress report during encoding", },
     { "attach", HAS_ARG | OPT_FUNC2, {(void*)opt_attach}, "add an attachment to the output file", "filename" },
     { "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(dump_attachment)}, "extract an attachment into a file", "filename" },