I've tried searching the forums for an answer but couldn't find a solution to my problem. I've got a matroska .mkv file with video [bold](v_mpeg4/iso/avc)[/bold], multiple audio tracks and subtitles. I am trying to convert the h264 video to divx/xvid. My only problem is trying to get access to the video stream to do the conversion. I am able to extract audio and subs from the .mkv file using mkvextract, but gives me this error when trying to extract the video stream: Opening the mkv file in VirtualDubMod gives me this error: Can anyone give me some pointers as to what I need to do?