FFMPEG codec setting

if you get error with "unknown codec 'xvid'" or "unkown codec 'mp3'" while ffmpeg working.

you need value change: xvid > libxvid , mp3 > libmp3lame

ffmpeg out file audio sync problem

when you getting file out-of-sync

Got it! ffmpeg-devel( or ffmpeg) with the -async 1 options works quite well. :)