Getting ffmpeg to work with php 500 website error or access denied

Question

I have two paths without success and different results: using the exec method ffmpeg really works and creates an output file, but then the site crashes with an error of 500. if I use the proc_open method, it starts and creates the atest.log log file in the storage folder output, but ffmpeg errors at the end: store \ audio_recording_1441120844021u.mp3: Permission denied and does not write the file.

ffmpeg has full IUSR permissions, and these permissions are also in the repository folder.

any ideas

exec method: -

 $cmd = "ffmpeg.exe -i C:\\Windows\\Temp\\recordings\\".$filename." -i watermark.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 store\\".$filename;
 echo exec($cmd, $o, $v);

Proc_open method: -

 $cmd = "ffmpeg.exe -i C:\\Windows\\Temp\\recordings\\".$filename." -i watermark.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 store\\".$filename;
 $pipes = array();
 $descriptors = array(2 => array('file', 'store\\atest.log', 'a'));

 $p = proc_open($cmd, $descriptors, $pipes);
 $done = 0;
 while (!$done) 
 {
      sleep(1);

      $status = proc_get_status($p);
      if (!$status['running']) $done = 1;

      echo "STEEL RUN\n";
      // some manipulations with "store\\atest.log"

 } 

Answer 1

for exec (), adding -nostdin did the trick. eg.

$cmd = "ffmpeg.exe -nostdin -i C:\Windows\Temp\recordings \". $filename. "-i watermark.mp3 -filter_complex amerge -c: a libmp3lame -q: a 4 store \". $ ;