avformat/avidec: Workaround broken initial frame

Fixes Ticket4851 Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
10 years ago · 3e2ef00394
parent 8e924629eb
commit 3e2ef00394
1 changed files with 2 additions and 1 deletions
--- 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;