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demux_lavf: for avi, use packet .dts instead of .pts

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When playing avi files take timestamps from the .dts field of the
packet instead of .pts. For avi libavformat returns the original avi
timestamps in .dts; without GENPTS set .pts is sometimes unset, with
GENPTS set it'll contain some made up values which are not correct
pts. Current libavformat also has a bug take makes it loop over the
whole avi file if you use GENPTS with video streams disabled.

The timing code can cope with the avi timestamps even though they're
not really pts.
This commit is contained in:
Uoti Urpala 2010-11-06 23:17:16 +02:00
parent d707da9e65
commit 759231566a
1 changed files with 12 additions and 4 deletions
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16
libmpdemux/demux_lavf.c
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@ -76,6 +76,7 @@ typedef struct lavf_priv {
int cur_program;
int nb_streams_last;
bool internet_radio_hack;
bool use_dts;
}lavf_priv_t;
static int mp_read(void *opaque, uint8_t *buf, int size) {
@ -516,8 +517,14 @@ static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
if (lavfdopts->cryptokey)
parse_cryptokey(avfc, lavfdopts->cryptokey);
if (opts->user_correct_pts != 0)
avfc->flags |= AVFMT_FLAG_GENPTS;
if (matches_avinputformat_name(priv, "avi")) {
/* for avi libavformat returns the avi timestamps in .dts,
* some made-up stuff that's not really pts in .pts */
priv->use_dts = true;
} else {
if (opts->user_correct_pts != 0)
avfc->flags |= AVFMT_FLAG_GENPTS;
}
if (index_mode == 0)
avfc->flags |= AVFMT_FLAG_IGNIDX;
@ -721,8 +728,9 @@ static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
av_free_packet(&pkt);
}
if(pkt.pts != AV_NOPTS_VALUE){
dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
int64_t ts = priv->use_dts ? pkt.dts : pkt.pts;
if(ts != AV_NOPTS_VALUE){
dp->pts = ts * av_q2d(priv->avfc->streams[id]->time_base);
priv->last_pts= dp->pts * AV_TIME_BASE;
// always set endpts for subtitles, even if PKT_FLAG_KEY is not set,
// otherwise they will stay on screen to long if e.g. ASS is demuxed from mkv