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-rw-r--r--libavformat/avidec.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 30b949770e..2b4bc84abb 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -1568,7 +1568,8 @@ static int avi_read_idx1(AVFormatContext *s, int size)
ast = st->priv_data;
if (first_packet && first_packet_pos) {
- data_offset = first_packet_pos - pos;
+ if (avi->movi_list + 4 != pos || pos + 500 > first_packet_pos)
+ data_offset = first_packet_pos - pos;
first_packet = 0;
}
pos += data_offset;