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avformat/mpegts: Skip over broken 0x80 headers

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This fixes demuxing of 01c56b0dc1.ts

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-04-10 19:29:55 +02:00
parent ea41ab0987
commit dbe1dd59e0
1 changed files with 9 additions and 3 deletions
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12
libavformat/mpegts.c
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@ -2354,7 +2354,7 @@ static void reanalyze(MpegTSContext *ts) {
/* XXX: try to find a better synchro over several packets (use
* get_packet_size() ?) */
static int mpegts_resync(AVFormatContext *s, int seekback)
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
{
MpegTSContext *ts = s->priv_data;
AVIOContext *pb = s->pb;
@ -2363,6 +2363,12 @@ static int mpegts_resync(AVFormatContext *s, int seekback)
avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
//Special case for files like 01c56b0dc1.ts
if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
avio_seek(pb, 12, SEEK_CUR);
return 0;
}
for (i = 0; i < ts->resync_size; i++) {
c = avio_r8(pb);
if (avio_feof(pb))
@ -2394,7 +2400,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
if ((*data)[0] != 0x47) {
/* find a new packet start */
if (mpegts_resync(s, raw_packet_size) < 0)
if (mpegts_resync(s, raw_packet_size, *data) < 0)
return AVERROR(EAGAIN);
else
continue;
@ -2749,7 +2755,7 @@ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
if (buf[0] != 0x47) {
if (mpegts_resync(s, TS_PACKET_SIZE) < 0)
if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
return AV_NOPTS_VALUE;
pos = avio_tell(s->pb);
continue;