Fix muxing mjpeg in swf.

(cherry picked from commit 7680d99b43)
2012-09-12 13:08:27 +02:00
parent 50e6e494c9
commit 2cf6afffe5
1 changed files with 2 additions and 0 deletions
--- a/libavformat/swfenc.c
+++ b/libavformat/swfenc.c
@ -498,8 +498,10 @@ static int swf_write_trailer(AVFormatContext *s)
        avio_wl32(pb, file_size);
        avio_seek(pb, swf->duration_pos, SEEK_SET);
        avio_wl16(pb, swf->video_frame_number);
+        if (swf->vframes_pos) {
        avio_seek(pb, swf->vframes_pos, SEEK_SET);
        avio_wl16(pb, swf->video_frame_number);
+        }
        avio_seek(pb, file_size, SEEK_SET);
    }
    return 0;