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avidec: Mark first frame as keyframe in case there are no keyframes.

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This fixes seeking in filecopy.avi of Ticket504

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-01-30 23:52:45 +01:00
parent e03cd1049e
commit 83d6ad3616
1 changed files with 9 additions and 0 deletions
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9
libavformat/avidec.c
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@ -1248,6 +1248,7 @@ static int avi_read_idx1(AVFormatContext *s, int size)
unsigned last_pos= -1; unsigned last_pos= -1;
unsigned last_idx= -1; unsigned last_idx= -1;
int64_t idx1_pos, first_packet_pos = 0, data_offset = 0; int64_t idx1_pos, first_packet_pos = 0, data_offset = 0;
int anykey = 0;
nb_index_entries = size / 16; nb_index_entries = size / 16;
if (nb_index_entries <= 0) if (nb_index_entries <= 0)
@ -1299,6 +1300,14 @@ static int avi_read_idx1(AVFormatContext *s, int size)
} }
ast->cum_len += get_duration(ast, len); ast->cum_len += get_duration(ast, len);
last_pos= pos; last_pos= pos;
anykey |= flags&AVIIF_INDEX;
}
if (!anykey) {
for (index = 0; index < s->nb_streams; index++) {
st = s->streams[index];
if (st->nb_index_entries)
st->index_entries[0].flags |= AVINDEX_KEYFRAME;
}
} }
return 0; return 0;
} }