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generic seeking: fail if there are 1000 non keyframes found with no keyframe.

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This avoids scanning through a whole file just to fail.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-05 18:23:47 +02:00
parent ec1ffae0cd
commit f9bd979476
1 changed files with 7 additions and 2 deletions
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9
libavformat/utils.c
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@ -1749,6 +1749,7 @@ static int seek_frame_generic(AVFormatContext *s,
if(index < 0 || index==st->nb_index_entries-1){
AVPacket pkt;
int nonkey=0;
if(st->nb_index_entries){
assert(st->index_entries);
@ -1768,9 +1769,13 @@ static int seek_frame_generic(AVFormatContext *s,
if (read_status < 0)
break;
av_free_packet(&pkt);
if(stream_index == pkt.stream_index){
if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
if(stream_index == pkt.stream_index && pkt.dts > timestamp){
if(pkt.flags & AV_PKT_FLAG_KEY)
break;
if(nonkey++ > 1000){
av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
break;
}
}
}
index = av_index_search_timestamp(st, timestamp, flags);