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avdemux: reset to 0 negative pts

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for us pts are unsigned so reset to 0 negative pts returned from libav.
This is better than outputs completly wrong timestamps

https://bugzilla.gnome.org/show_bug.cgi?id=787795
This commit is contained in:
Nicola Murino 2017-09-23 17:14:03 +02:00 committed by Nicolas Dufresne
parent e6773f6932
commit f86dfde0a4
1 changed files with 16 additions and 1 deletions
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17
ext/libav/gstavdemux.c
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@ -1394,6 +1394,7 @@ gst_ffmpegdemux_loop (GstFFMpegDemux * demux)
gint outsize;
gboolean rawvideo;
GstFlowReturn stream_last_flow;
gint64 pts;
/* open file if we didn't so already */
if (!demux->opened)
@ -1421,7 +1422,21 @@ gst_ffmpegdemux_loop (GstFFMpegDemux * demux)
/* do timestamps, we do this first so that we can know when we
* stepped over the segment stop position. */
timestamp = gst_ffmpeg_time_ff_to_gst (pkt.pts, avstream->time_base);
pts = pkt.pts;
if (G_UNLIKELY (pts < 0)) {
/* some streams have pts such this:
* 0
* -2
* -1
* 1
*
* we reset pts to 0 since for us timestamp are unsigned
*/
GST_WARNING_OBJECT (demux,
"negative pts detected: %" G_GINT64_FORMAT " resetting to 0", pts);
pts = 0;
}
timestamp = gst_ffmpeg_time_ff_to_gst (pts, avstream->time_base);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
stream->last_ts = timestamp;
}