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flvdec: Add sanity checking of the last packet size

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For http, this avoids spurious warnings about failed requests (e.g.
HTTP error 416 Requested Range Not Satisfiable), if the last packet
is truncated and the size read is bogus.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö
2016-01-19 10:04:32 +02:00
parent 09f4822e4e
commit e4eb13ca77
1 changed files with 9 additions and 7 deletions
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2
libavformat/flvdec.c
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@@ -846,6 +846,7 @@ skip:
const int64_t fsize = avio_size(s->pb);
avio_seek(s->pb, fsize - 4, SEEK_SET);
size = avio_rb32(s->pb);
if (size > 0 && size < fsize) {
// Seek to the start of the last FLV tag at position (fsize - 4 - size)
// but skip the byte indicating the type.
avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
@@ -854,6 +855,7 @@ skip:
ts |= avio_r8(s->pb) << 24;
s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
}
}
avio_seek(s->pb, pos, SEEK_SET);
flv->searched_for_end = 1;
}