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avformat/mpegts: Fix probing of mpegts with invalid ASC

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Fixes Ticket5566

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-06-07 15:46:08 +02:00
parent a2e6c785ce
commit e01b19dece
1 changed files with 10 additions and 7 deletions
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17
libavformat/mpegts.c
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@ -542,13 +542,16 @@ static int analyze(const uint8_t *buf, int size, int packet_size,
memset(stat, 0, packet_size * sizeof(*stat));
for (i = 0; i < size - 3; i++) {
if (buf[i] == 0x47 &&
(!probe || (buf[i + 3] & 0x30))) {
int x = i % packet_size;
stat[x]++;
stat_all++;
if (stat[x] > best_score) {
best_score = stat[x];
if (buf[i] == 0x47) {
int pid = AV_RB16(buf+1) & 0x1FFF;
int asc = buf[i + 3] & 0x30;
if (!probe || pid == 0x1FFF || asc) {
int x = i % packet_size;
stat[x]++;
stat_all++;
if (stat[x] > best_score) {
best_score = stat[x];
}
}
}
}