exec() command not working

Question

I am using exec() function to run my commands on centos server. All was working fine untill i used command: $command= ffmpeg -i input video.mp4 -vf fade=out:0:5 output.mp4

The command is ok as it is running on server via command line but when i execute it using php it is not giving the output. I have already created a video from ffmpeg using the exec() function but this command is not working. What can be the reason i am confused how a command can run on server but not work while executing from php.

Other command i executed using exec() function is : $command = ffmpeg -i %d.jpg -y -s 320x240 -aspect 4:3 output.mp4

and it is working perfectly and the video is also created but previous command is not giving video as output.

Please guide me...

Could you copy/paste the exact PHP you're using? Quoting is important. — Mat
– Mat, Commented Sep 28, 2011 at 5:41
are you sure your input file name is called input video.mp4, with a space in the middle? — maialithar
– maialithar, Commented Sep 28, 2011 at 6:27
no there is no space. The actual command is: ffmpeg -i fade.mp4 -vf "fade=out:0:5" output.mp4. My exact php code is:$command= 'ffmpeg -i slideshow/frame1.mp4 -vf "fade=out:0:5" slideshow/fade1.mp4' exec($command) — Rajat
– Rajat, Commented Sep 28, 2011 at 7:22

PiTheNumber · Accepted Answer · 2011-09-28 07:42:51Z

2

Try debugging you command execution. For ffmpeg you need to pipe the output with 2>&1 to see it:

exec($command." 2>&1", $output);
echo "<pre>";
var_dump($output);
echo "</pre>";

answered Sep 28, 2011 at 7:42

PiTheNumber

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4 Comments

Rajat Over a year ago

It is returning: string(37) "frame1.mp4: No such file or directory" but frame1.mp4 is present at the location slideshow/. Why it is not able to find the file?

PiTheNumber Over a year ago

Try using the full path to the file and check the file permissions.

Rajat Over a year ago

When i used the full file path with file permissions 777 i get:string(24) "Unrecognized option 'vf'" . What else i should use to refer to filters i also tried -vfilters but the same error comes...

PiTheNumber Over a year ago

-vf should work. Check out the Doku, looks ugly but helps a lot!

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