CPU usage overload with Ffmpeg in Video Upload Converter site

Question

i am working on a video converter site in which you can upload a video an then convert it to the format you want.

Everything works great only problem is CPU usage overload of ffmpeg, when I upload 4 instance 4 HD videos CPU usage gets to 70-80%

To control this I would like to find a way to low cpu usage or priorizy it, I tried several tutorials like: http://www.nixtutor.com/linux/changing-priority-on-linux-processes/

but don't seem to control that, I tried this and then ffmpeg didn't work had to update it.

So once i control CPU usage I would also like to use a php queue system to control video conversion.

Could anyone give me any tips, orientation on how to get this working?

Thank you in advance

BTW My server is Centos Linux 6

Answer 1

您可以减少FFmpeg 的线程数

ffmpeg in.mp4 -threads 1 out.mp4