static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
-static int video_codec_tag = 0;
+static unsigned int video_codec_tag = 0;
static char *video_language = NULL;
static int same_quality = 0;
static int do_deinterlace = 0;
static int audio_disable = 0;
static int audio_channels = 1;
static char *audio_codec_name = NULL;
-static int audio_codec_tag = 0;
+static unsigned int audio_codec_tag = 0;
static char *audio_language = NULL;
static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;
-static int subtitle_codec_tag = 0;
+static unsigned int subtitle_codec_tag = 0;
static float mux_preload= 0.5;
static float mux_max_delay= 0.7;