CODEWITHSUNDEEP
phpffmpegubuntu-16.04cpu
casusbelli
casusbelli

Reputation: 463

FFMPEG makes my website DOWN while converting video

I have an upload.php script to upload & convert videos where I use FFMPEG. (LAMP Ubuntu 16.04)

However as soon as FFMPEG starts to convert the video, the all website becomes unresponsive so I guess FFMPEG uses all my CPU.

Here is the 3 lines I use to convert source video:

* Check format, size, ect..

shell_exec('ffmpeg -i '.$temp_path.' -r 1/1 '.$path_jpeg.'');
shell_exec('ffmpeg -i '.$temp_path.' -f webm -c:v libvpx -b:v 1M -acodec libvorbis '.$path_webm.' -hide_banner');
shell_exec('ffmpeg -i '.$temp_path.' -c:v libx264 -preset veryfast -c:a copy '.$path_mp4.' -hide_banner');

* Add video data to DB

Is there anyway to limit CPU ressources for FFMPEG while converting videos?

Thanks

EDIT :

I tried to use -threads 1 without success

shell_exec('ffmpeg -i '.$temp_path.' -f webm -c:v libvpx -threads 1 -b:v 1M -acodec libvorbis '.$path_webm.' -hide_banner');
shell_exec('ffmpeg -i '.$temp_path.' -c:v libx264 -threads 1 -preset veryfast -c:a copy '.$path_mp4.' -hide_banner');

I tried to use nice -n 15 without success as well

shell_exec('nice -n 15 ffmpeg -i '.$temp_path.' -f webm -c:v libvpx -b:v 1M -acodec libvorbis '.$path_webm.' -hide_banner');
shell_exec('nice -n 15 ffmpeg -i '.$temp_path.' -c:v libx264 -preset veryfast -c:a copy '.$path_mp4.' -hide_banner');

FFMPEG is still eating 100% of my CPU while converting

enter image description here

Upvotes: 1

Views: 108

Answers (2)

Pedram A
Pedram A

Reputation: 187

This happened because you didn't send FFMPEG process to background. you can do this by using nohup.

shell_exec("nohup ffmpeg (...)  > foo.out 2> foo.err < /dev/null &");

Upvotes: 1

Brad
Brad

Reputation: 163272

You can always execute FFmpeg with nice. Something like this...

shell_exec('nice -n 15 ffmpeg...

Note that your system may actually be starved for some other resource, like disk I/O. Use top to find out.

Upvotes: 0

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