avformat/dashdec: add dash demuxer base version
authorSteven Liu <lq@chinaffmpeg.org>
Sat, 9 Sep 2017 00:32:03 +0000 (08:32 +0800)
committerSteven Liu <lq@chinaffmpeg.org>
Sat, 9 Sep 2017 00:32:03 +0000 (08:32 +0800)
ffmpeg need a dash demuxer for demux the dash formats base on
https://github.com/samsamsam-iptvplayer/exteplayer3/blob/master/tmp/ffmpeg/patches/3.2.2/000001_add_dash_demux.patch

TODO:
1. support multi bitrate dash.

v2 fixed:
1. from autodetect to disabled
2. from camelCase code style to ffmpeg code style
3. from RepType to AVMediaType
4. fix variable typo
5. change time value from uint32_t to uint64_t
6. removed be used once API
7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and av_timegm
8. merge complex free operation to free_fragment
9. use API from snprintf to av_asprintf

v3 fixed:
1. fix typo from --enabled-xml2 to --enable-xml2

v4 fixed:
1. from --enable-xml2 to --enable-libxml2
2. move system includes to top
3. remove nouse includes
4. rename enum name
5. add a trailing comma for the last entry enum
6. fix comment typo
7. add const to DASHContext class front
8. check sscanf if return arguments and give warning message when error
9. check validity before free seg->url and seg
10. check if the val is null, before use atoll

v5 fixed:
1. fix typo from mainifest to manifest

v6 fixed:
1. from realloc to av_realloc
2. from free to av_free

v7 fixed:
1. remove the -lxml2 from configure when require_pkg_config

v8 fixed:
1. fix replace filename template by av_asprintf secure problem

v9 modified:
1. make manifest parser clearly

v10 fixed:
1. fix function API name code style
2. remove redundant strreplace call
3. remove redundant memory operation and check return value from get_content_url()
4. add space between ) and {
5. remove no need to log the value for print

v11 fixed:
1. from atoll to strtoll
Suggested-by: Michael Niedermayer <michael@niedermayer.cc>
v12 fixed:
1. remove strreplace and instead by av_strreplace
Suggested-by: Nicolas George <george@nsup.org>
v13 fixed:
1. fix bug: cannot play:
http://dash.edgesuite.net/akamai/bbb_30fps/bbb_30fps.mpd
Reported-by: Andy Furniss <adf.lists@gmail.com>
v14 fixed:
1. fix bug: TLS connection was non-properly terminated
2. fix bug: No trailing CRLF found in HTTP header
Reported-by: Andy Furniss <adf.lists@gmail.com>
v15 fixed:
1. play youtube link: ffmpeg -i $(youtube-dl -J "https://www.youtube.com/watch?v=XmL19DOP_Ls" | jq -r ".requested_formats[0].manifest_url")
2. code refine for timeline living stream
Reported-by: Ricardo Constantino <wiiaboo@gmail.com>
v16 fixed:
1. remove the snprintf and instead by get_segment_filename make safety
2. remove unnecessary loops
3. updated xmlStrcmp and xmlFree to av_* functions
4. merge code repeat into one function
5. add memory alloc faild check
6. update update_init_section and open_url
7. output safety error message when filename template not safe
Suggested-by : wm4 <nfxjfg@googlemail.com>

v17 fixed:
1. add memory alloc faild check
2. fix resource space error at free_representation

v18 fixed:
1. add condition of template format

v19 fixed:
1. fix typo of the option describe

v20 fixed:
1. add the c->base_url alloc check
2. make the DASHTmplId same to dashenc

v21 fixed:
1. remove get_repl_pattern_and_format and get_segment_filename
2. process use dashcomm APIs

v22 fixed:
1. modify the include "dashcomm.h" to include "dash.h"
2. use internal API from dash_fill_tmpl_params to ff_dash_fill_tmpl_params

Signed-off-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: samsamsam <samsamsam@o2.pl>
configure
libavformat/Makefile
libavformat/allformats.c
libavformat/dashdec.c [new file with mode: 0644]

index 3ac0a3c..4dd11ef 100755 (executable)
--- a/configure
+++ b/configure
@@ -277,6 +277,7 @@ External library support:
   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
   --enable-libxvid         enable Xvid encoding via xvidcore,
                            native MPEG-4/Xvid encoder exists [no]
+  --enable-libxml2         enable XML parsing using the C library libxml2 [no]
   --enable-libzimg         enable z.lib, needed for zscale filter [no]
   --enable-libzmq          enable message passing via libzmq [no]
   --enable-libzvbi         enable teletext support via libzvbi [no]
@@ -1601,6 +1602,7 @@ EXTERNAL_LIBRARY_LIST="
     libvpx
     libwavpack
     libwebp
+    libxml2
     libzimg
     libzmq
     libzvbi
@@ -2952,6 +2954,7 @@ avi_muxer_select="riffenc"
 caf_demuxer_select="iso_media riffdec"
 caf_muxer_select="iso_media"
 dash_muxer_select="mp4_muxer"
+dash_demuxer_deps="libxml2"
 dirac_demuxer_select="dirac_parser"
 dts_demuxer_select="dca_parser"
 dtshd_demuxer_select="dca_parser"
@@ -5990,6 +5993,7 @@ enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi &&
                              { check_cpp_condition libzvbi.h "VBI_VERSION_MAJOR > 0 || VBI_VERSION_MINOR > 2 || VBI_VERSION_MINOR == 2 && VBI_VERSION_MICRO >= 28" ||
                                enabled gpl || die "ERROR: libzvbi requires version 0.2.28 or --enable-gpl."; }
+enabled libxml2           && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion
 enabled mediacodec        && { enabled jni || die "ERROR: mediacodec requires --enable-jni"; }
 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
                                { ! enabled cross_compile &&
index de954af..ac03e0d 100644 (file)
@@ -133,6 +133,7 @@ OBJS-$(CONFIG_CRC_MUXER)                 += crcenc.o
 OBJS-$(CONFIG_DATA_DEMUXER)              += rawdec.o
 OBJS-$(CONFIG_DATA_MUXER)                += rawenc.o
 OBJS-$(CONFIG_DASH_MUXER)                += dash.o dashenc.o
+OBJS-$(CONFIG_DASH_DEMUXER)              += dashdec.o
 OBJS-$(CONFIG_DAUD_DEMUXER)              += dauddec.o
 OBJS-$(CONFIG_DAUD_MUXER)                += daudenc.o
 OBJS-$(CONFIG_DCSTR_DEMUXER)             += dcstr.o
index cb09a60..416e5e1 100644 (file)
@@ -96,7 +96,7 @@ static void register_all(void)
     REGISTER_DEMUXER (CINE,             cine);
     REGISTER_DEMUXER (CONCAT,           concat);
     REGISTER_MUXER   (CRC,              crc);
-    REGISTER_MUXER   (DASH,             dash);
+    REGISTER_MUXDEMUX(DASH,             dash);
     REGISTER_MUXDEMUX(DATA,             data);
     REGISTER_MUXDEMUX(DAUD,             daud);
     REGISTER_DEMUXER (DCSTR,            dcstr);
diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
new file mode 100644 (file)
index 0000000..9a3a199
--- /dev/null
@@ -0,0 +1,1848 @@
+/*
+ * Dynamic Adaptive Streaming over HTTP demux
+ * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
+ * Copyright (c) 2017 Steven Liu
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <libxml/parser.h>
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+#include "libavutil/parseutils.h"
+#include "internal.h"
+#include "avio_internal.h"
+#include "dash.h"
+
+#define INITIAL_BUFFER_SIZE 32768
+
+struct fragment {
+    int64_t url_offset;
+    int64_t size;
+    char *url;
+};
+
+/*
+ * reference to : ISO_IEC_23009-1-DASH-2012
+ * Section: 5.3.9.6.2
+ * Table: Table 17 — Semantics of SegmentTimeline element
+ * */
+struct timeline {
+    /* starttime: Element or Attribute Name
+     * specifies the MPD start time, in @timescale units,
+     * the first Segment in the series starts relative to the beginning of the Period.
+     * The value of this attribute must be equal to or greater than the sum of the previous S
+     * element earliest presentation time and the sum of the contiguous Segment durations.
+     * If the value of the attribute is greater than what is expressed by the previous S element,
+     * it expresses discontinuities in the timeline.
+     * If not present then the value shall be assumed to be zero for the first S element
+     * and for the subsequent S elements, the value shall be assumed to be the sum of
+     * the previous S element's earliest presentation time and contiguous duration
+     * (i.e. previous S@starttime + @duration * (@repeat + 1)).
+     * */
+    int64_t starttime;
+    /* repeat: Element or Attribute Name
+     * specifies the repeat count of the number of following contiguous Segments with
+     * the same duration expressed by the value of @duration. This value is zero-based
+     * (e.g. a value of three means four Segments in the contiguous series).
+     * */
+    int64_t repeat;
+    /* duration: Element or Attribute Name
+     * specifies the Segment duration, in units of the value of the @timescale.
+     * */
+    int64_t duration;
+};
+
+/*
+ * Each playlist has its own demuxer. If it is currently active,
+ * it has an opened AVIOContext too, and potentially an AVPacket
+ * containing the next packet from this stream.
+ */
+struct representation {
+    char *url_template;
+    AVIOContext pb;
+    AVIOContext *input;
+    AVFormatContext *parent;
+    AVFormatContext *ctx;
+    AVPacket pkt;
+    int rep_idx;
+    int rep_count;
+    int stream_index;
+
+    enum AVMediaType type;
+
+    int n_fragments;
+    struct fragment **fragments; /* VOD list of fragment for profile */
+
+    int n_timelines;
+    struct timeline **timelines;
+
+    int64_t first_seq_no;
+    int64_t last_seq_no;
+    int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
+
+    int64_t fragment_duration;
+    int64_t fragment_timescale;
+
+    int64_t presentation_timeoffset;
+
+    int64_t cur_seq_no;
+    int64_t cur_seg_offset;
+    int64_t cur_seg_size;
+    struct fragment *cur_seg;
+
+    /* Currently active Media Initialization Section */
+    struct fragment *init_section;
+    uint8_t *init_sec_buf;
+    uint32_t init_sec_buf_size;
+    uint32_t init_sec_data_len;
+    uint32_t init_sec_buf_read_offset;
+    int64_t cur_timestamp;
+    int is_restart_needed;
+};
+
+typedef struct DASHContext {
+    const AVClass *class;
+    char *base_url;
+    struct representation *cur_video;
+    struct representation *cur_audio;
+
+    /* MediaPresentationDescription Attribute */
+    uint64_t media_presentation_duration;
+    uint64_t suggested_presentation_delay;
+    uint64_t availability_start_time;
+    uint64_t publish_time;
+    uint64_t minimum_update_period;
+    uint64_t time_shift_buffer_depth;
+    uint64_t min_buffer_time;
+
+    /* Period Attribute */
+    uint64_t period_duration;
+    uint64_t period_start;
+
+    int is_live;
+    AVIOInterruptCB *interrupt_callback;
+    char *user_agent;                    ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
+    char *cookies;                       ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
+    char *headers;                       ///< holds HTTP headers set as an AVOption to the HTTP protocol context
+    char *allowed_extensions;
+    AVDictionary *avio_opts;
+} DASHContext;
+
+static uint64_t get_current_time_in_sec(void)
+{
+    return  av_gettime() / 1000000;
+}
+
+static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
+{
+    struct tm timeinfo;
+    int year = 0;
+    int month = 0;
+    int day = 0;
+    int hour = 0;
+    int minute = 0;
+    int ret = 0;
+    float second = 0.0;
+
+    /* ISO-8601 date parser */
+    if (!datetime)
+        return 0;
+
+    ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
+    /* year, month, day, hour, minute, second  6 arguments */
+    if (ret != 6) {
+        av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
+    }
+    timeinfo.tm_year = year - 1900;
+    timeinfo.tm_mon  = month - 1;
+    timeinfo.tm_mday = day;
+    timeinfo.tm_hour = hour;
+    timeinfo.tm_min  = minute;
+    timeinfo.tm_sec  = (int)second;
+
+    return av_timegm(&timeinfo);
+}
+
+static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
+{
+    /* ISO-8601 duration parser */
+    uint32_t days = 0;
+    uint32_t hours = 0;
+    uint32_t mins = 0;
+    uint32_t secs = 0;
+    int size = 0;
+    float value = 0;
+    char type = '\0';
+    const char *ptr = duration;
+
+    while (*ptr) {
+        if (*ptr == 'P' || *ptr == 'T') {
+            ptr++;
+            continue;
+        }
+
+        if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
+            av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
+            return 0; /* parser error */
+        }
+        switch (type) {
+            case 'D':
+                days = (uint32_t)value;
+                break;
+            case 'H':
+                hours = (uint32_t)value;
+                break;
+            case 'M':
+                mins = (uint32_t)value;
+                break;
+            case 'S':
+                secs = (uint32_t)value;
+                break;
+            default:
+                // handle invalid type
+                break;
+        }
+        ptr += size;
+    }
+    return  ((days * 24 + hours) * 60 + mins) * 60 + secs;
+}
+
+static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
+{
+    int64_t start_time = 0;
+    int64_t i = 0;
+    int64_t j = 0;
+    int64_t num = 0;
+
+    if (pls->n_timelines) {
+        for (i = 0; i < pls->n_timelines; i++) {
+            if (pls->timelines[i]->starttime > 0) {
+                start_time = pls->timelines[i]->starttime;
+            }
+            if (num == cur_seq_no)
+                goto finish;
+
+            start_time += pls->timelines[i]->duration;
+            for (j = 0; j < pls->timelines[i]->repeat; j++) {
+                num++;
+                if (num == cur_seq_no)
+                    goto finish;
+                start_time += pls->timelines[i]->duration;
+            }
+            num++;
+        }
+    }
+finish:
+    return start_time;
+}
+
+static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
+{
+    int64_t i = 0;
+    int64_t j = 0;
+    int64_t num = 0;
+    int64_t start_time = 0;
+
+    for (i = 0; i < pls->n_timelines; i++) {
+        if (pls->timelines[i]->starttime > 0) {
+            start_time = pls->timelines[i]->starttime;
+        }
+        if (start_time > cur_time)
+            goto finish;
+
+        start_time += pls->timelines[i]->duration;
+        for (j = 0; j < pls->timelines[i]->repeat; j++) {
+            num++;
+            if (start_time > cur_time)
+                goto finish;
+            start_time += pls->timelines[i]->duration;
+        }
+        num++;
+    }
+
+    return -1;
+
+finish:
+    return num;
+}
+
+static void free_fragment(struct fragment **seg)
+{
+    if (!(*seg)) {
+        return;
+    }
+    av_freep(&(*seg)->url);
+    av_freep(seg);
+}
+
+static void free_fragment_list(struct representation *pls)
+{
+    int i;
+
+    for (i = 0; i < pls->n_fragments; i++) {
+        free_fragment(&pls->fragments[i]);
+    }
+    av_freep(&pls->fragments);
+    pls->n_fragments = 0;
+}
+
+static void free_timelines_list(struct representation *pls)
+{
+    int i;
+
+    for (i = 0; i < pls->n_timelines; i++) {
+        av_freep(&pls->timelines[i]);
+    }
+    av_freep(&pls->timelines);
+    pls->n_timelines = 0;
+}
+
+static void free_representation(struct representation *pls)
+{
+    free_fragment_list(pls);
+    free_timelines_list(pls);
+    free_fragment(&pls->cur_seg);
+    free_fragment(&pls->init_section);
+    av_freep(&pls->init_sec_buf);
+    av_freep(&pls->pb.buffer);
+    if (pls->input)
+        ff_format_io_close(pls->parent, &pls->input);
+    if (pls->ctx) {
+        pls->ctx->pb = NULL;
+        avformat_close_input(&pls->ctx);
+    }
+
+    av_freep(&pls->url_template);
+    av_freep(pls);
+}
+
+static void set_httpheader_options(DASHContext *c, AVDictionary *opts)
+{
+    // broker prior HTTP options that should be consistent across requests
+    av_dict_set(&opts, "user-agent", c->user_agent, 0);
+    av_dict_set(&opts, "cookies", c->cookies, 0);
+    av_dict_set(&opts, "headers", c->headers, 0);
+    if (c->is_live) {
+        av_dict_set(&opts, "seekable", "0", 0);
+    }
+}
+static void update_options(char **dest, const char *name, void *src)
+{
+    av_freep(dest);
+    av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
+    if (*dest)
+        av_freep(dest);
+}
+
+static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
+                    AVDictionary *opts, AVDictionary *opts2, int *is_http)
+{
+    DASHContext *c = s->priv_data;
+    AVDictionary *tmp = NULL;
+    const char *proto_name = NULL;
+    int ret;
+
+    av_dict_copy(&tmp, opts, 0);
+    av_dict_copy(&tmp, opts2, 0);
+
+    if (av_strstart(url, "crypto", NULL)) {
+        if (url[6] == '+' || url[6] == ':')
+            proto_name = avio_find_protocol_name(url + 7);
+    }
+
+    if (!proto_name)
+        proto_name = avio_find_protocol_name(url);
+
+    if (!proto_name)
+        return AVERROR_INVALIDDATA;
+
+    // only http(s) & file are allowed
+    if (av_strstart(proto_name, "file", NULL)) {
+        if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
+            av_log(s, AV_LOG_ERROR,
+                "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
+                "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
+                url);
+            return AVERROR_INVALIDDATA;
+        }
+    } else if (av_strstart(proto_name, "http", NULL)) {
+        ;
+    } else
+        return AVERROR_INVALIDDATA;
+
+    if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
+        ;
+    else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
+        ;
+    else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
+        return AVERROR_INVALIDDATA;
+
+    ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
+    if (ret >= 0) {
+        // update cookies on http response with setcookies.
+        char *new_cookies = NULL;
+
+        if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
+            av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
+
+        if (new_cookies) {
+            av_free(c->cookies);
+            c->cookies = new_cookies;
+        }
+
+        av_dict_set(&opts, "cookies", c->cookies, 0);
+    }
+
+    av_dict_free(&tmp);
+
+    if (is_http)
+        *is_http = av_strstart(proto_name, "http", NULL);
+
+    return ret;
+}
+
+static char *get_content_url(xmlNodePtr *baseurl_nodes,
+                             int n_baseurl_nodes,
+                             char *rep_id_val,
+                             char *rep_bandwidth_val,
+                             char *val)
+{
+    int i;
+    char *text;
+    char *url = NULL;
+    char tmp_str[MAX_URL_SIZE];
+    char tmp_str_2[MAX_URL_SIZE];
+
+    memset(tmp_str, 0, sizeof(tmp_str));
+
+    for (i = 0; i < n_baseurl_nodes; ++i) {
+        if (baseurl_nodes[i] &&
+            baseurl_nodes[i]->children &&
+            baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
+            text = xmlNodeGetContent(baseurl_nodes[i]->children);
+            if (text) {
+                memset(tmp_str, 0, sizeof(tmp_str));
+                memset(tmp_str_2, 0, sizeof(tmp_str_2));
+                ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text);
+                av_strlcpy(tmp_str, tmp_str_2, sizeof(tmp_str));
+                av_free(text);
+            }
+        }
+    }
+
+    if (val)
+        av_strlcat(tmp_str, (const char*)val, sizeof(tmp_str));
+
+    if (rep_id_val) {
+        url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
+        if (!url) {
+            return NULL;
+        }
+        av_strlcpy(tmp_str, url, sizeof(tmp_str));
+        av_free(url);
+    }
+    if (rep_bandwidth_val && tmp_str[0] != '\0') {
+        url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
+        if (!url) {
+            return NULL;
+        }
+    }
+    return url;
+}
+
+static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
+{
+    int i;
+    char *val;
+
+    for (i = 0; i < n_nodes; ++i) {
+        if (nodes[i]) {
+            val = xmlGetProp(nodes[i], attrname);
+            if (val)
+                return val;
+        }
+    }
+
+    return NULL;
+}
+
+static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
+{
+    xmlNodePtr node = rootnode;
+    if (!node) {
+        return NULL;
+    }
+
+    node = xmlFirstElementChild(node);
+    while (node) {
+        if (!av_strcasecmp(node->name, nodename)) {
+            return node;
+        }
+        node = xmlNextElementSibling(node);
+    }
+    return NULL;
+}
+
+static enum AVMediaType get_content_type(xmlNodePtr node)
+{
+    enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
+    int i = 0;
+    const char *attr;
+    char *val = NULL;
+
+    if (node) {
+        for (i = 0; i < 2; i++) {
+            attr = i ? "mimeType" : "contentType";
+            val = xmlGetProp(node, attr);
+            if (val) {
+                if (av_stristr((const char *)val, "video")) {
+                    type = AVMEDIA_TYPE_VIDEO;
+                } else if (av_stristr((const char *)val, "audio")) {
+                    type = AVMEDIA_TYPE_AUDIO;
+                }
+                av_free(val);
+            }
+        }
+    }
+    return type;
+}
+
+static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
+                                         xmlNodePtr fragmenturl_node,
+                                         xmlNodePtr *baseurl_nodes,
+                                         char *rep_id_val,
+                                         char *rep_bandwidth_val)
+{
+    char *initialization_val = NULL;
+    char *media_val = NULL;
+
+    if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
+        initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
+        if (initialization_val) {
+            rep->init_section = av_mallocz(sizeof(struct fragment));
+            if (!rep->init_section) {
+                av_free(initialization_val);
+                return AVERROR(ENOMEM);
+            }
+            rep->init_section->url = get_content_url(baseurl_nodes, 4,
+                                                     rep_id_val,
+                                                     rep_bandwidth_val,
+                                                     initialization_val);
+            if (!rep->init_section->url) {
+                av_free(rep->init_section);
+                av_free(initialization_val);
+                return AVERROR(ENOMEM);
+            }
+            rep->init_section->size = -1;
+            av_free(initialization_val);
+        }
+    } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
+        media_val = xmlGetProp(fragmenturl_node, "media");
+        if (media_val) {
+            struct fragment *seg = av_mallocz(sizeof(struct fragment));
+            if (!seg) {
+                av_free(media_val);
+                return AVERROR(ENOMEM);
+            }
+            seg->url = get_content_url(baseurl_nodes, 4,
+                                       rep_id_val,
+                                       rep_bandwidth_val,
+                                       media_val);
+            if (!seg->url) {
+                av_free(seg);
+                av_free(media_val);
+                return AVERROR(ENOMEM);
+            }
+            seg->size = -1;
+            dynarray_add(&rep->fragments, &rep->n_fragments, seg);
+            av_free(media_val);
+        }
+    }
+
+    return 0;
+}
+
+static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
+                                          xmlNodePtr fragment_timeline_node)
+{
+    xmlAttrPtr attr = NULL;
+    char *val  = NULL;
+
+    if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
+        struct timeline *tml = av_mallocz(sizeof(struct timeline));
+        if (!tml) {
+            return AVERROR(ENOMEM);
+        }
+        attr = fragment_timeline_node->properties;
+        while (attr) {
+            val = xmlGetProp(fragment_timeline_node, attr->name);
+
+            if (!val) {
+                av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
+                continue;
+            }
+
+            if (!av_strcasecmp(attr->name, (const char *)"t")) {
+                tml->starttime = (int64_t)strtoll(val, NULL, 10);
+            } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
+                tml->repeat =(int64_t) strtoll(val, NULL, 10);
+            } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
+                tml->duration = (int64_t)strtoll(val, NULL, 10);
+            }
+            attr = attr->next;
+            av_free(val);
+        }
+        dynarray_add(&rep->timelines, &rep->n_timelines, tml);
+    }
+
+    return 0;
+}
+
+static int parse_manifest_representation(AVFormatContext *s, const char *url,
+                                         xmlNodePtr node,
+                                         xmlNodePtr adaptionset_node,
+                                         xmlNodePtr mpd_baseurl_node,
+                                         xmlNodePtr period_baseurl_node,
+                                         xmlNodePtr fragment_template_node,
+                                         xmlNodePtr content_component_node,
+                                         xmlNodePtr adaptionset_baseurl_node)
+{
+    int32_t ret = 0;
+    int32_t audio_rep_idx = 0;
+    int32_t video_rep_idx = 0;
+    DASHContext *c = s->priv_data;
+    struct representation *rep = NULL;
+    struct fragment *seg = NULL;
+    xmlNodePtr representation_segmenttemplate_node = NULL;
+    xmlNodePtr representation_baseurl_node = NULL;
+    xmlNodePtr representation_segmentlist_node = NULL;
+    xmlNodePtr fragment_timeline_node = NULL;
+    xmlNodePtr fragment_templates_tab[2];
+    char *duration_val = NULL;
+    char *presentation_timeoffset_val = NULL;
+    char *startnumber_val = NULL;
+    char *timescale_val = NULL;
+    char *initialization_val = NULL;
+    char *media_val = NULL;
+    xmlNodePtr baseurl_nodes[4];
+    xmlNodePtr representation_node = node;
+    char *rep_id_val = xmlGetProp(representation_node, "id");
+    char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
+    enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
+
+    // try get information from representation
+    if (type == AVMEDIA_TYPE_UNKNOWN)
+        type = get_content_type(representation_node);
+    // try get information from contentComponen
+    if (type == AVMEDIA_TYPE_UNKNOWN)
+        type = get_content_type(content_component_node);
+    // try get information from adaption set
+    if (type == AVMEDIA_TYPE_UNKNOWN)
+        type = get_content_type(adaptionset_node);
+    if (type == AVMEDIA_TYPE_UNKNOWN) {
+        av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
+    } else if ((type == AVMEDIA_TYPE_VIDEO && !c->cur_video) || (type == AVMEDIA_TYPE_AUDIO && !c->cur_audio)) {
+        // convert selected representation to our internal struct
+        rep = av_mallocz(sizeof(struct representation));
+        if (!rep) {
+            ret = AVERROR(ENOMEM);
+            goto end;
+        }
+        representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
+        representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
+        representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
+
+        baseurl_nodes[0] = mpd_baseurl_node;
+        baseurl_nodes[1] = period_baseurl_node;
+        baseurl_nodes[2] = adaptionset_baseurl_node;
+        baseurl_nodes[3] = representation_baseurl_node;
+
+        if (representation_segmenttemplate_node || fragment_template_node) {
+            fragment_timeline_node = NULL;
+            fragment_templates_tab[0] = representation_segmenttemplate_node;
+            fragment_templates_tab[1] = fragment_template_node;
+
+            presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "presentationTimeOffset");
+            duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "duration");
+            startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "startNumber");
+            timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "timescale");
+            initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization");
+            media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "media");
+
+            if (initialization_val) {
+                rep->init_section = av_mallocz(sizeof(struct fragment));
+                if (!rep->init_section) {
+                    av_free(rep);
+                    ret = AVERROR(ENOMEM);
+                    goto end;
+                }
+                rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val);
+                if (!rep->init_section->url) {
+                    av_free(rep->init_section);
+                    av_free(rep);
+                    ret = AVERROR(ENOMEM);
+                    goto end;
+                }
+                rep->init_section->size = -1;
+                av_free(initialization_val);
+            }
+
+            if (media_val) {
+                rep->url_template = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val);
+                av_free(media_val);
+            }
+
+            if (presentation_timeoffset_val) {
+                rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
+                av_free(presentation_timeoffset_val);
+            }
+            if (duration_val) {
+                rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
+                av_free(duration_val);
+            }
+            if (timescale_val) {
+                rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
+                av_free(timescale_val);
+            }
+            if (startnumber_val) {
+                rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
+                av_free(startnumber_val);
+            }
+
+            fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
+
+            if (!fragment_timeline_node)
+                fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
+            if (fragment_timeline_node) {
+                fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
+                while (fragment_timeline_node) {
+                    ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
+                    if (ret < 0) {
+                        return ret;
+                    }
+                    fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
+                }
+            }
+        } else if (representation_baseurl_node && !representation_segmentlist_node) {
+            seg = av_mallocz(sizeof(struct fragment));
+            if (!seg) {
+                ret = AVERROR(ENOMEM);
+                goto end;
+            }
+            seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, NULL);
+            if (!seg->url) {
+                av_free(seg);
+                ret = AVERROR(ENOMEM);
+                goto end;
+            }
+            seg->size = -1;
+            dynarray_add(&rep->fragments, &rep->n_fragments, seg);
+        } else if (representation_segmentlist_node) {
+            // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
+            // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
+            xmlNodePtr fragmenturl_node = NULL;
+            duration_val = xmlGetProp(representation_segmentlist_node, "duration");
+            timescale_val = xmlGetProp(representation_segmentlist_node, "timescale");
+            if (duration_val) {
+                rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
+                av_free(duration_val);
+            }
+            if (timescale_val) {
+                rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
+                av_free(timescale_val);
+            }
+            fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
+            while (fragmenturl_node) {
+                ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
+                                                    baseurl_nodes,
+                                                    rep_id_val,
+                                                    rep_bandwidth_val);
+                if (ret < 0) {
+                    return ret;
+                }
+                fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
+            }
+
+            fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
+
+            if (!fragment_timeline_node)
+                fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
+            if (fragment_timeline_node) {
+                fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
+                while (fragment_timeline_node) {
+                    ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
+                    if (ret < 0) {
+                        return ret;
+                    }
+                    fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
+                }
+            }
+        } else {
+            free_representation(rep);
+            rep = NULL;
+            av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
+        }
+
+        if (rep) {
+            if (rep->fragment_duration > 0 && !rep->fragment_timescale)
+                rep->fragment_timescale = 1;
+            if (type == AVMEDIA_TYPE_VIDEO) {
+                rep->rep_idx = video_rep_idx;
+                c->cur_video = rep;
+            } else {
+                rep->rep_idx = audio_rep_idx;
+                c->cur_audio = rep;
+            }
+        }
+    }
+
+    video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
+    audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
+
+end:
+    if (rep_id_val)
+        av_free(rep_id_val);
+    if (rep_bandwidth_val)
+        av_free(rep_bandwidth_val);
+
+    return ret;
+}
+
+static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
+                                        xmlNodePtr adaptionset_node,
+                                        xmlNodePtr mpd_baseurl_node,
+                                        xmlNodePtr period_baseurl_node)
+{
+    int ret = 0;
+    xmlNodePtr fragment_template_node = NULL;
+    xmlNodePtr content_component_node = NULL;
+    xmlNodePtr adaptionset_baseurl_node = NULL;
+    xmlNodePtr node = NULL;
+
+    node = xmlFirstElementChild(adaptionset_node);
+    while (node) {
+        if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
+            fragment_template_node = node;
+        } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
+            content_component_node = node;
+        } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
+            adaptionset_baseurl_node = node;
+        } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
+            ret = parse_manifest_representation(s, url, node,
+                                                adaptionset_node,
+                                                mpd_baseurl_node,
+                                                period_baseurl_node,
+                                                fragment_template_node,
+                                                content_component_node,
+                                                adaptionset_baseurl_node);
+            if (ret < 0) {
+                return ret;
+            }
+        }
+        node = xmlNextElementSibling(node);
+    }
+    return 0;
+}
+
+static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
+{
+    DASHContext *c = s->priv_data;
+    int ret = 0;
+    int close_in = 0;
+    uint8_t *new_url = NULL;
+    int64_t filesize = 0;
+    char *buffer = NULL;
+    AVDictionary *opts = NULL;
+    xmlDoc *doc = NULL;
+    xmlNodePtr root_element = NULL;
+    xmlNodePtr node = NULL;
+    xmlNodePtr period_node = NULL;
+    xmlNodePtr mpd_baseurl_node = NULL;
+    xmlNodePtr period_baseurl_node = NULL;
+    xmlNodePtr adaptionset_node = NULL;
+    xmlAttrPtr attr = NULL;
+    char *val  = NULL;
+    uint32_t perdiod_duration_sec = 0;
+    uint32_t perdiod_start_sec = 0;
+    int32_t audio_rep_idx = 0;
+    int32_t video_rep_idx = 0;
+
+    if (!in) {
+        close_in = 1;
+
+        set_httpheader_options(c, opts);
+        ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
+        av_dict_free(&opts);
+        if (ret < 0)
+            return ret;
+    }
+
+    if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
+        c->base_url = av_strdup(new_url);
+    } else {
+        c->base_url = av_strdup(url);
+    }
+
+    filesize = avio_size(in);
+    if (filesize <= 0) {
+        filesize = 8 * 1024;
+    }
+
+    buffer = av_mallocz(filesize);
+    if (!buffer) {
+        av_free(c->base_url);
+        return AVERROR(ENOMEM);
+    }
+
+    filesize = avio_read(in, buffer, filesize);
+    if (filesize <= 0) {
+        av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
+        ret = AVERROR_INVALIDDATA;
+    } else {
+        LIBXML_TEST_VERSION
+
+        doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
+        root_element = xmlDocGetRootElement(doc);
+        node = root_element;
+
+        if (!node) {
+            ret = AVERROR_INVALIDDATA;
+            av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
+            goto cleanup;
+        }
+
+        if (node->type != XML_ELEMENT_NODE ||
+            av_strcasecmp(node->name, (const char *)"MPD")) {
+            ret = AVERROR_INVALIDDATA;
+            av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
+            goto cleanup;
+        }
+
+        val = xmlGetProp(node, "type");
+        if (!val) {
+            av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
+            ret = AVERROR_INVALIDDATA;
+            goto cleanup;
+        }
+        if (!av_strcasecmp(val, (const char *)"dynamic"))
+            c->is_live = 1;
+        av_free(val);
+
+        attr = node->properties;
+        while (attr) {
+            val = xmlGetProp(node, attr->name);
+
+            if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
+                c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
+                c->publish_time = get_utc_date_time_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
+                c->minimum_update_period = get_duration_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
+                c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
+                c->min_buffer_time = get_duration_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
+                c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
+            } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
+                c->media_presentation_duration = get_duration_insec(s, (const char *)val);
+            }
+            attr = attr->next;
+            av_free(val);
+        }
+
+        mpd_baseurl_node = find_child_node_by_name(node, "BaseURL");
+
+        // at now we can handle only one period, with the longest duration
+        node = xmlFirstElementChild(node);
+        while (node) {
+            if (!av_strcasecmp(node->name, (const char *)"Period")) {
+                perdiod_duration_sec = 0;
+                perdiod_start_sec = 0;
+                attr = node->properties;
+                while (attr) {
+                    val = xmlGetProp(node, attr->name);
+                    if (!av_strcasecmp(attr->name, (const char *)"duration")) {
+                        perdiod_duration_sec = get_duration_insec(s, (const char *)val);
+                    } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
+                        perdiod_start_sec = get_duration_insec(s, (const char *)val);
+                    }
+                    attr = attr->next;
+                    av_free(val);
+                }
+                if ((perdiod_duration_sec) >= (c->period_duration)) {
+                    period_node = node;
+                    c->period_duration = perdiod_duration_sec;
+                    c->period_start = perdiod_start_sec;
+                    if (c->period_start > 0)
+                        c->media_presentation_duration = c->period_duration;
+                }
+            }
+            node = xmlNextElementSibling(node);
+        }
+        if (!period_node) {
+            av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
+            ret = AVERROR_INVALIDDATA;
+            goto cleanup;
+        }
+
+        adaptionset_node = xmlFirstElementChild(period_node);
+        while (adaptionset_node) {
+            if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
+                period_baseurl_node = adaptionset_node;
+            } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
+                parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node);
+            }
+            adaptionset_node = xmlNextElementSibling(adaptionset_node);
+        }
+        if (c->cur_video) {
+            c->cur_video->rep_count = video_rep_idx;
+            av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx);
+            av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)video_rep_idx);
+        }
+        if (c->cur_audio) {
+            c->cur_audio->rep_count = audio_rep_idx;
+        }
+cleanup:
+        /*free the document */
+        xmlFreeDoc(doc);
+        xmlCleanupParser();
+    }
+
+    av_free(new_url);
+    av_free(buffer);
+    if (close_in) {
+        avio_close(in);
+    }
+    return ret;
+}
+
+static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
+{
+    DASHContext *c = s->priv_data;
+    int64_t num = 0;
+    int64_t start_time_offset = 0;
+
+    if (c->is_live) {
+        if (pls->n_fragments) {
+            num = pls->first_seq_no;
+        } else if (pls->n_timelines) {
+            start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - pls->timelines[pls->first_seq_no]->starttime; // total duration of playlist
+            if (start_time_offset < 60 * pls->fragment_timescale)
+                start_time_offset = 0;
+            else
+                start_time_offset = start_time_offset - 60 * pls->fragment_timescale;
+
+            num = calc_next_seg_no_from_timelines(pls, pls->timelines[pls->first_seq_no]->starttime + start_time_offset);
+            if (num == -1)
+                num = pls->first_seq_no;
+        } else if (pls->fragment_duration){
+            if (pls->presentation_timeoffset) {
+                num = pls->presentation_timeoffset * pls->fragment_timescale / pls->fragment_duration;
+            } else if (c->publish_time > 0 && !c->availability_start_time) {
+                num = pls->first_seq_no + (((c->publish_time - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
+            } else {
+                num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
+            }
+        }
+    } else {
+        num = pls->first_seq_no;
+    }
+    return num;
+}
+
+static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
+{
+    DASHContext *c = s->priv_data;
+    int64_t num = 0;
+
+    if (c->is_live && pls->fragment_duration) {
+        num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
+    } else {
+        num = pls->first_seq_no;
+    }
+    return num;
+}
+
+static int64_t calc_max_seg_no(struct representation *pls)
+{
+    DASHContext *c = pls->parent->priv_data;
+    int64_t num = 0;
+
+    if (pls->n_fragments) {
+        num = pls->first_seq_no + pls->n_fragments - 1;
+    } else if (pls->n_timelines) {
+        int i = 0;
+        num = pls->first_seq_no + pls->n_timelines - 1;
+        for (i = 0; i < pls->n_timelines; i++) {
+            num += pls->timelines[i]->repeat;
+        }
+    } else if (c->is_live && pls->fragment_duration) {
+        num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale)  / pls->fragment_duration;
+    } else if (pls->fragment_duration) {
+        num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
+    }
+
+    return num;
+}
+
+static void move_timelines(struct representation *rep_src, struct representation *rep_dest)
+{
+    if (rep_dest && rep_src ) {
+        free_timelines_list(rep_dest);
+        rep_dest->timelines    = rep_src->timelines;
+        rep_dest->n_timelines  = rep_src->n_timelines;
+        rep_dest->first_seq_no = rep_src->first_seq_no;
+        rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
+        rep_src->timelines = NULL;
+        rep_src->n_timelines = 0;
+        rep_dest->cur_seq_no = rep_src->cur_seq_no;
+    }
+}
+
+static void move_segments(struct representation *rep_src, struct representation *rep_dest)
+{
+    if (rep_dest && rep_src ) {
+        free_fragment_list(rep_dest);
+        if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
+            rep_dest->cur_seq_no = 0;
+        else
+            rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
+        rep_dest->fragments    = rep_src->fragments;
+        rep_dest->n_fragments  = rep_src->n_fragments;
+        rep_dest->parent  = rep_src->parent;
+        rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
+        rep_src->fragments = NULL;
+        rep_src->n_fragments = 0;
+    }
+}
+
+
+static int refresh_manifest(AVFormatContext *s)
+{
+
+    int ret = 0;
+    DASHContext *c = s->priv_data;
+
+    // save current context
+    struct representation *cur_video =  c->cur_video;
+    struct representation *cur_audio =  c->cur_audio;
+    char *base_url = c->base_url;
+
+    c->base_url = NULL;
+    c->cur_video = NULL;
+    c->cur_audio = NULL;
+    ret = parse_manifest(s, s->filename, NULL);
+    if (ret)
+        goto finish;
+
+    if (cur_video && cur_video->timelines || cur_audio && cur_audio->timelines) {
+        // calc current time
+        int64_t currentVideoTime = 0;
+        int64_t currentAudioTime = 0;
+        if (cur_video && cur_video->timelines)
+            currentVideoTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
+        if (cur_audio && cur_audio->timelines)
+            currentAudioTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
+        // update segments
+        if (cur_video && cur_video->timelines) {
+            c->cur_video->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_video, currentVideoTime * cur_video->fragment_timescale - 1);
+            if (c->cur_video->cur_seq_no >= 0) {
+                move_timelines(c->cur_video, cur_video);
+            }
+        }
+        if (cur_audio && cur_audio->timelines) {
+            c->cur_audio->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_audio, currentAudioTime * cur_audio->fragment_timescale - 1);
+            if (c->cur_audio->cur_seq_no >= 0) {
+               move_timelines(c->cur_audio, cur_audio);
+            }
+        }
+    }
+    if (cur_video && cur_video->fragments) {
+        move_segments(c->cur_video, cur_video);
+    }
+    if (cur_audio && cur_audio->fragments) {
+        move_segments(c->cur_audio, cur_audio);
+    }
+
+finish:
+    // restore context
+    if (c->base_url)
+        av_free(base_url);
+    else
+        c->base_url  = base_url;
+    if (c->cur_audio)
+        free_representation(c->cur_audio);
+    if (c->cur_video)
+        free_representation(c->cur_video);
+    c->cur_audio = cur_audio;
+    c->cur_video = cur_video;
+    return ret;
+}
+
+static struct fragment *get_current_fragment(struct representation *pls)
+{
+    int64_t min_seq_no = 0;
+    int64_t max_seq_no = 0;
+    struct fragment *seg = NULL;
+    struct fragment *seg_ptr = NULL;
+    DASHContext *c = pls->parent->priv_data;
+
+    while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
+        if (pls->cur_seq_no < pls->n_fragments) {
+            seg_ptr = pls->fragments[pls->cur_seq_no];
+            seg = av_mallocz(sizeof(struct fragment));
+            if (!seg) {
+                return NULL;
+            }
+            seg->url = av_strdup(seg_ptr->url);
+            if (!seg->url) {
+                av_free(seg);
+                return NULL;
+            }
+            seg->size = seg_ptr->size;
+            seg->url_offset = seg_ptr->url_offset;
+            return seg;
+        } else if (c->is_live) {
+            refresh_manifest(pls->parent);
+        } else {
+            break;
+        }
+    }
+    if (c->is_live) {
+        min_seq_no = calc_min_seg_no(pls->parent, pls);
+        max_seq_no = calc_max_seg_no(pls);
+
+        if (pls->timelines || pls->fragments) {
+            refresh_manifest(pls->parent);
+        }
+        if (pls->cur_seq_no <= min_seq_no) {
+            av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
+            pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
+        } else if (pls->cur_seq_no > max_seq_no) {
+            av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", min_seq_no, max_seq_no, (int)pls->rep_idx);
+        }
+        seg = av_mallocz(sizeof(struct fragment));
+        if (!seg) {
+            return NULL;
+        }
+    } else if (pls->cur_seq_no <= pls->last_seq_no) {
+        seg = av_mallocz(sizeof(struct fragment));
+        if (!seg) {
+            return NULL;
+        }
+    }
+    if (seg) {
+        char tmpfilename[MAX_URL_SIZE];
+
+        ff_dash_fill_tmpl_params(tmpfilename, sizeof(tmpfilename), pls->url_template, 0, pls->cur_seq_no, 0, get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no));
+        seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
+        if (!seg->url) {
+            av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
+            seg->url = av_strdup(pls->url_template);
+            if (!seg->url) {
+                av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
+                return NULL;
+            }
+        }
+
+        seg->size = -1;
+    }
+
+    return seg;
+}
+
+enum ReadFromURLMode {
+    READ_NORMAL,
+    READ_COMPLETE,
+};
+
+static int read_from_url(struct representation *pls, struct fragment *seg,
+                         uint8_t *buf, int buf_size,
+                         enum ReadFromURLMode mode)
+{
+    int ret;
+
+    /* limit read if the fragment was only a part of a file */
+    if (seg->size >= 0)
+        buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
+
+    if (mode == READ_COMPLETE) {
+        ret = avio_read(pls->input, buf, buf_size);
+        if (ret < buf_size) {
+            av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n");
+        }
+    } else {
+        ret = avio_read(pls->input, buf, buf_size);
+    }
+    if (ret > 0)
+        pls->cur_seg_offset += ret;
+
+    return ret;
+}
+
+static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
+{
+    AVDictionary *opts = NULL;
+    char url[MAX_URL_SIZE];
+    int ret;
+
+    set_httpheader_options(c, opts);
+    if (seg->size >= 0) {
+        /* try to restrict the HTTP request to the part we want
+         * (if this is in fact a HTTP request) */
+        av_dict_set_int(&opts, "offset", seg->url_offset, 0);
+        av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
+    }
+
+    ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
+    av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
+           url, seg->url_offset, pls->rep_idx);
+    ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
+    if (ret < 0) {
+        goto cleanup;
+    }
+
+    /* Seek to the requested position. If this was a HTTP request, the offset
+     * should already be where want it to, but this allows e.g. local testing
+     * without a HTTP server. */
+    if (!ret && seg->url_offset) {
+        int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
+        if (seekret < 0) {
+            av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url);
+            ret = (int) seekret;
+            ff_format_io_close(pls->parent, &pls->input);
+        }
+    }
+
+cleanup:
+    av_dict_free(&opts);
+    pls->cur_seg_offset = 0;
+    pls->cur_seg_size = seg->size;
+    return ret;
+}
+
+static int update_init_section(struct representation *pls)
+{
+    static const int max_init_section_size = 1024 * 1024;
+    DASHContext *c = pls->parent->priv_data;
+    int64_t sec_size;
+    int64_t urlsize;
+    int ret;
+
+    if (!pls->init_section || pls->init_sec_buf)
+        return 0;
+
+    ret = open_input(c, pls, pls->init_section);
+    if (ret < 0) {
+        av_log(pls->parent, AV_LOG_WARNING,
+               "Failed to open an initialization section in playlist %d\n",
+               pls->rep_idx);
+        return ret;
+    }
+
+    if (pls->init_section->size >= 0)
+        sec_size = pls->init_section->size;
+    else if ((urlsize = avio_size(pls->input)) >= 0)
+        sec_size = urlsize;
+    else
+        sec_size = max_init_section_size;
+
+    av_log(pls->parent, AV_LOG_DEBUG,
+           "Downloading an initialization section of size %"PRId64"\n",
+           sec_size);
+
+    sec_size = FFMIN(sec_size, max_init_section_size);
+
+    av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
+
+    ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
+                        pls->init_sec_buf_size, READ_COMPLETE);
+    ff_format_io_close(pls->parent, &pls->input);
+
+    if (ret < 0)
+        return ret;
+
+    pls->init_sec_data_len = ret;
+    pls->init_sec_buf_read_offset = 0;
+
+    return 0;
+}
+
+static int64_t seek_data(void *opaque, int64_t offset, int whence)
+{
+    struct representation *v = opaque;
+    if (v->n_fragments && !v->init_sec_data_len) {
+        return avio_seek(v->input, offset, whence);
+    }
+
+    return AVERROR(ENOSYS);
+}
+
+static int read_data(void *opaque, uint8_t *buf, int buf_size)
+{
+    int ret = 0;
+    struct representation *v = opaque;
+    DASHContext *c = v->parent->priv_data;
+
+restart:
+    if (!v->input) {
+        free_fragment(&v->cur_seg);
+        v->cur_seg = get_current_fragment(v);
+        if (!v->cur_seg) {
+            ret = AVERROR_EOF;
+            goto end;
+        }
+
+        /* load/update Media Initialization Section, if any */
+        ret = update_init_section(v);
+        if (ret)
+            goto end;
+
+        ret = open_input(c, v, v->cur_seg);
+        if (ret < 0) {
+            if (ff_check_interrupt(c->interrupt_callback)) {
+                goto end;
+                ret = AVERROR_EXIT;
+            }
+            av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
+            v->cur_seq_no++;
+            goto restart;
+        }
+    }
+
+    if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
+        /* Push init section out first before first actual fragment */
+        int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
+        memcpy(buf, v->init_sec_buf, copy_size);
+        v->init_sec_buf_read_offset += copy_size;
+        ret = copy_size;
+        goto end;
+    }
+
+    /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
+    if (!v->cur_seg) {
+        v->cur_seg = get_current_fragment(v);
+    }
+    if (!v->cur_seg) {
+        ret = AVERROR_EOF;
+        goto end;
+    }
+    ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
+    if (ret > 0)
+        goto end;
+
+    if (!v->is_restart_needed)
+        v->cur_seq_no++;
+    v->is_restart_needed = 1;
+
+end:
+    return ret;
+}
+
+static int save_avio_options(AVFormatContext *s)
+{
+    DASHContext *c = s->priv_data;
+    const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
+    uint8_t *buf = NULL;
+    int ret = 0;
+
+    while (*opt) {
+        if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
+            if (buf[0] != '\0') {
+                ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
+                if (ret < 0)
+                    return ret;
+            }
+        }
+        opt++;
+    }
+
+    return ret;
+}
+
+static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
+                          int flags, AVDictionary **opts)
+{
+    av_log(s, AV_LOG_ERROR,
+           "A DASH playlist item '%s' referred to an external file '%s'. "
+           "Opening this file was forbidden for security reasons\n",
+           s->filename, url);
+    return AVERROR(EPERM);
+}
+
+static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
+{
+    DASHContext *c = s->priv_data;
+    AVInputFormat *in_fmt = NULL;
+    AVDictionary  *in_fmt_opts = NULL;
+    uint8_t *avio_ctx_buffer  = NULL;
+    int ret = 0;
+
+    if (pls->ctx) {
+        /* note: the internal buffer could have changed, and be != avio_ctx_buffer */
+        av_freep(&pls->pb.buffer);
+        memset(&pls->pb, 0x00, sizeof(AVIOContext));
+        pls->ctx->pb = NULL;
+        avformat_close_input(&pls->ctx);
+        pls->ctx = NULL;
+    }
+    if (!(pls->ctx = avformat_alloc_context())) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    avio_ctx_buffer  = av_malloc(INITIAL_BUFFER_SIZE);
+    if (!avio_ctx_buffer ) {
+        ret = AVERROR(ENOMEM);
+        avformat_free_context(pls->ctx);
+        pls->ctx = NULL;
+        goto fail;
+    }
+    if (c->is_live) {
+        ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
+    } else {
+        ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
+    }
+    pls->pb.seekable = 0;
+
+    if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
+        goto fail;
+
+    pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
+    pls->ctx->probesize = 1024 * 4;
+    pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
+    ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
+    if (ret < 0) {
+        av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
+        avformat_free_context(pls->ctx);
+        pls->ctx = NULL;
+        goto fail;
+    }
+
+    pls->ctx->pb = &pls->pb;
+    pls->ctx->io_open  = nested_io_open;
+
+    // provide additional information from mpd if available
+    ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
+    av_dict_free(&in_fmt_opts);
+    if (ret < 0)
+        goto fail;
+    if (pls->n_fragments) {
+        ret = avformat_find_stream_info(pls->ctx, NULL);
+        if (ret < 0)
+            goto fail;
+    }
+
+fail:
+    return ret;
+}
+
+static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
+{
+    int ret = 0;
+    int i;
+
+    pls->parent = s;
+    pls->cur_seq_no  = calc_cur_seg_no(s, pls);
+    pls->last_seq_no = calc_max_seg_no(pls);
+
+    ret = reopen_demux_for_component(s, pls);
+    if (ret < 0) {
+        goto fail;
+    }
+    for (i = 0; i < pls->ctx->nb_streams; i++) {
+        AVStream *st = avformat_new_stream(s, NULL);
+        AVStream *ist = pls->ctx->streams[i];
+        if (!st) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+        st->id = i;
+        avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar);
+        avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
+    }
+
+    return 0;
+fail:
+    return ret;
+}
+
+static int dash_read_header(AVFormatContext *s)
+{
+    void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
+    DASHContext *c = s->priv_data;
+    int ret = 0;
+    int stream_index = 0;
+
+    c->interrupt_callback = &s->interrupt_callback;
+    // if the URL context is good, read important options we must broker later
+    if (u) {
+        update_options(&c->user_agent, "user-agent", u);
+        update_options(&c->cookies, "cookies", u);
+        update_options(&c->headers, "headers", u);
+    }
+
+    if ((ret = parse_manifest(s, s->filename, s->pb)) < 0)
+        goto fail;
+
+    if ((ret = save_avio_options(s)) < 0)
+        goto fail;
+
+    /* If this isn't a live stream, fill the total duration of the
+     * stream. */
+    if (!c->is_live) {
+        s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
+    }
+
+    /* Open the demuxer for curent video and current audio components if available */
+    if (!ret && c->cur_video) {
+        ret = open_demux_for_component(s, c->cur_video);
+        if (!ret) {
+            c->cur_video->stream_index = stream_index;
+            ++stream_index;
+        } else {
+            free_representation(c->cur_video);
+            c->cur_video = NULL;
+        }
+    }
+
+    if (!ret && c->cur_audio) {
+        ret = open_demux_for_component(s, c->cur_audio);
+        if (!ret) {
+            c->cur_audio->stream_index = stream_index;
+            ++stream_index;
+        } else {
+            free_representation(c->cur_audio);
+            c->cur_audio = NULL;
+        }
+    }
+
+    if (!stream_index) {
+        ret = AVERROR_INVALIDDATA;
+        goto fail;
+    }
+
+    /* Create a program */
+    if (!ret) {
+        AVProgram *program;
+        program = av_new_program(s, 0);
+        if (!program) {
+            goto fail;
+        }
+
+        if (c->cur_video) {
+            av_program_add_stream_index(s, 0, c->cur_video->stream_index);
+        }
+        if (c->cur_audio) {
+            av_program_add_stream_index(s, 0, c->cur_audio->stream_index);
+        }
+    }
+
+    return 0;
+fail:
+    return ret;
+}
+
+static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    DASHContext *c = s->priv_data;
+    int ret = 0;
+    struct representation *cur = NULL;
+
+    if (!c->cur_audio && !c->cur_video ) {
+        return AVERROR_INVALIDDATA;
+    }
+    if (c->cur_audio && !c->cur_video) {
+        cur = c->cur_audio;
+    } else if (!c->cur_audio && c->cur_video) {
+        cur = c->cur_video;
+    } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) {
+        cur = c->cur_video;
+    } else {
+        cur = c->cur_audio;
+    }
+
+    if (cur->ctx) {
+        while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
+            ret = av_read_frame(cur->ctx, pkt);
+            if (ret >= 0) {
+                /* If we got a packet, return it */
+                cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
+                pkt->stream_index = cur->stream_index;
+                return 0;
+            }
+            if (cur->is_restart_needed) {
+                cur->cur_seg_offset = 0;
+                cur->init_sec_buf_read_offset = 0;
+                if (cur->input)
+                    ff_format_io_close(cur->parent, &cur->input);
+                ret = reopen_demux_for_component(s, cur);
+                cur->is_restart_needed = 0;
+            }
+
+        }
+    }
+    return AVERROR_EOF;
+}
+
+static int dash_close(AVFormatContext *s)
+{
+    DASHContext *c = s->priv_data;
+    if (c->cur_audio) {
+        free_representation(c->cur_audio);
+    }
+    if (c->cur_video) {
+        free_representation(c->cur_video);
+    }
+
+    av_freep(&c->cookies);
+    av_freep(&c->user_agent);
+    av_dict_free(&c->avio_opts);
+    av_freep(&c->base_url);
+    return 0;
+}
+
+static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags)
+{
+    int ret = 0;
+    int i = 0;
+    int j = 0;
+    int64_t duration = 0;
+
+    av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seek_pos_msec, pls->rep_idx);
+
+    // single fragment mode
+    if (pls->n_fragments == 1) {
+        pls->cur_timestamp = 0;
+        pls->cur_seg_offset = 0;
+        ff_read_frame_flush(pls->ctx);
+        return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
+    }
+
+    if (pls->input)
+        ff_format_io_close(pls->parent, &pls->input);
+
+    // find the nearest fragment
+    if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
+        int64_t num = pls->first_seq_no;
+        av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
+               "last_seq_no[%"PRId64"], playlist %d.\n",
+               (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
+        for (i = 0; i < pls->n_timelines; i++) {
+            if (pls->timelines[i]->starttime > 0) {
+                duration = pls->timelines[i]->starttime;
+            }
+            duration += pls->timelines[i]->duration;
+            if (seek_pos_msec < ((duration * 1000) /  pls->fragment_timescale)) {
+                goto set_seq_num;
+            }
+            for (j = 0; j < pls->timelines[i]->repeat; j++) {
+                duration += pls->timelines[i]->duration;
+                num++;
+                if (seek_pos_msec < ((duration * 1000) /  pls->fragment_timescale)) {
+                    goto set_seq_num;
+                }
+            }
+            num++;
+        }
+
+set_seq_num:
+        pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
+        av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
+               (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
+    } else if (pls->fragment_duration > 0) {
+        pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
+    } else {
+        av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing fragment_duration\n");
+        pls->cur_seq_no = pls->first_seq_no;
+    }
+    pls->cur_timestamp = 0;
+    pls->cur_seg_offset = 0;
+    pls->init_sec_buf_read_offset = 0;
+    ret = reopen_demux_for_component(s, pls);
+
+    return ret;
+}
+
+static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
+{
+    int ret = 0;
+    DASHContext *c = s->priv_data;
+    int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
+                                           s->streams[stream_index]->time_base.den,
+                                           flags & AVSEEK_FLAG_BACKWARD ?
+                                           AV_ROUND_DOWN : AV_ROUND_UP);
+    if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
+        return AVERROR(ENOSYS);
+    if (c->cur_audio) {
+        ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags);
+    }
+    if (!ret && c->cur_video) {
+        ret = dash_seek(s, c->cur_video, seek_pos_msec, flags);
+    }
+    return ret;
+}
+
+static int dash_probe(AVProbeData *p)
+{
+    if (!av_stristr(p->buf, "<MPD"))
+        return 0;
+
+    if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
+        av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
+        av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
+        av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
+        return AVPROBE_SCORE_MAX;
+    }
+    if (av_stristr(p->buf, "dash:profile")) {
+        return AVPROBE_SCORE_MAX;
+    }
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(DASHContext, x)
+#define FLAGS AV_OPT_FLAG_DECODING_PARAM
+static const AVOption dash_options[] = {
+    {"allowed_extensions", "List of file extensions that dash is allowed to access",
+        OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
+        {.str = "aac,m4a,m4s,m4v,mov,mp4"},
+        INT_MIN, INT_MAX, FLAGS},
+    {NULL}
+};
+
+static const AVClass dash_class = {
+    .class_name = "dash",
+    .item_name  = av_default_item_name,
+    .option     = dash_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_dash_demuxer = {
+    .name           = "dash",
+    .long_name      = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
+    .priv_class     = &dash_class,
+    .priv_data_size = sizeof(DASHContext),
+    .read_probe     = dash_probe,
+    .read_header    = dash_read_header,
+    .read_packet    = dash_read_packet,
+    .read_close     = dash_close,
+    .read_seek      = dash_read_seek,
+    .flags          = AVFMT_NO_BYTE_SEEK,
+};