So I'm not sure if this video file is corrupt or if there's a bug elsewhere but it seems read_video_properties() doesn't check its arguments at all. I'm a bit puzzled why no video stream is found but I don't really have any solid evidence that there is a valid video stream either. I added a check for the lack of a video stream and now at least I just get a clean exit: ASF: No video stream found. ASF: No audio stream found -> no sound. Video: Cannot read properties. No stream found. Exiting... (End of file) --- libmpdemux/video.c.~1.39.~ 2003-04-04 10:38:46.000000000 -0500 +++ libmpdemux/video.c 2003-05-16 15:43:34.000000000 -0400 @@ -35,8 +35,11 @@ static float telecine_cnt=-2.5; int video_read_properties(sh_video_t *sh_video){ -demux_stream_t *d_video=sh_video->ds; - +demux_stream_t *d_video = sh_video->ds; +if (!d_video) { + return 0; +} + // Determine image properties: switch(d_video->demuxer->file_format){ case DEMUXER_TYPE_AVI: PS: I couldn't for the life of me figure out the indentation style in use here, I tried to mimic what I saw though. -- greg