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flvdemux: fix discontinuity threshold check when timestamps go backwards

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Since unsigned types are used, a negative value would show as very, very
positive.
Fixes A/V sync on some... less than well made files where timestamps go
backwards.
This commit is contained in:
Vincent Penquerc'h 2011-12-03 17:30:10 +00:00
parent 1e974b1581
commit 7a7db8cbaf
1 changed files with 2 additions and 2 deletions
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4
gst/flv/gstflvdemux.c
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@ -766,11 +766,11 @@ static void
gst_flv_demux_update_resync (GstFlvDemux * demux, guint32 pts, gboolean discont, gst_flv_demux_update_resync (GstFlvDemux * demux, guint32 pts, gboolean discont,
guint32 * last, GstClockTime * offset) guint32 * last, GstClockTime * offset)
{ {
if (!discont && ABS (pts - *last) >= RESYNC_THRESHOLD) { gint32 dpts = pts - *last;
if (!discont && ABS (dpts) >= RESYNC_THRESHOLD) {
/* Theoretically, we should use substract the duration of the last buffer, /* Theoretically, we should use substract the duration of the last buffer,
but this demuxer sends no durations on buffers, not sure if it cannot but this demuxer sends no durations on buffers, not sure if it cannot
know, or just does not care to calculate. */ know, or just does not care to calculate. */
gint32 dpts = pts - *last;
*offset -= dpts * GST_MSECOND; *offset -= dpts * GST_MSECOND;
GST_WARNING_OBJECT (demux, GST_WARNING_OBJECT (demux,
"Large pts gap (%" G_GINT32_FORMAT " ms), assuming resync, offset now %" "Large pts gap (%" G_GINT32_FORMAT " ms), assuming resync, offset now %"