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avformat/mpegts: fix resync seek 

The seek ended up seeking before the begin, which caused problems
Fixes initial sync issues with libbluray
Fixes Ticket3117

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-18 16:38:12 +01:00
parent cbefb3d909
commit 7d0e927a31
1 changed files with 3 additions and 1 deletions
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4
libavformat/mpegts.c
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@ -1993,7 +1993,9 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, co
/* check packet sync byte */ /* check packet sync byte */
if ((*data)[0] != 0x47) { if ((*data)[0] != 0x47) {
/* find a new packet start */ /* find a new packet start */
avio_seek(pb, -raw_packet_size, SEEK_CUR); uint64_t pos = avio_tell(pb);
avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
if (mpegts_resync(s) < 0) if (mpegts_resync(s) < 0)
return AVERROR(EAGAIN); return AVERROR(EAGAIN);
else else