[FFmpeg-devel] [PATCH 1/3] flvdec: Check index for being valid Fixes seeking in Enigma_Principles_of_Lust.flv
Michael Niedermayer
michaelni at gmx.at
Fri Dec 30 01:38:39 CET 2011
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
libavformat/flvdec.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 57ef061..2e50320 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -200,7 +200,16 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream
}
}
- if (timeslen == fileposlen && fileposlen && max_pos <= filepositions[0]) {
+ if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
+ int64_t dts, size0, size1;
+ avio_seek(ioc, filepositions[1]-4, SEEK_SET);
+ size0 = avio_rb32(ioc);
+ avio_r8(ioc);
+ size1 = avio_rb24(ioc);
+ dts = avio_rb24(ioc);
+ dts |= avio_r8(ioc) << 24;
+ if (size0 > filepositions[1] || FFABS(dts - times[1]*1000)>5000)
+ goto finish;
for(i = 0; i < timeslen; i++)
av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
} else
--
1.7.5.4
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