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Handle 0-size sync packets when only parsing headers.

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Currently, the duration of those packets is just discarded
when enabling parsing, thus the output of the Metal Gear Solid
demuxer breaks completely when just setting AVSTREAM_PARSE_HEADERS.
The result will not be correct if a parser creates a delay even
with PARSER_FLAG_COMPLETE_FRAMES and there might be other cases
where it does not work correct, but just discarding them as it
is done currently seems worse.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2012-03-25 13:16:48 +02:00
parent fca62f0500
commit 699c61d2f0
1 changed files with 3 additions and 0 deletions
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3
libavformat/utils.c
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@ -1133,6 +1133,9 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
av_init_packet(&flush_pkt);
pkt = &flush_pkt;
got_output = 1;
} else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
// preserve 0-size sync packets
compute_pkt_fields(s, st, st->parser, pkt);
}
while (size > 0 || (pkt == &flush_pkt && got_output)) {