> ffmpeg -acode aac -ac1 -ab 48K -strict experimental –vcodec libx264 –pre > libx264-slow.ffpreset –fpre libx264-ipod640.ffpreset –b 450K –threads 0 > filename.wmv You can tell by "running" it and checking the output. My guess is that you could get some variables from one, some from another, but the latter would override... -r