Hi, On Wed, Dec 15, 2010 at 12:06 PM, Dang Son <sonbka2002 at gmail.com> wrote: > Actually, I converted 5 files concurrency. is OK. so it confuse with your > explanation. Can you make more clear? Please don't top-post. And please ask on the appropriate mailinglist (ffmpeg-user in this case, not ffmpeg-devel).