I'm converting some movies and want to make sure the conversion went through without errors:
exec("ffmpeg -i ".$orgVideoFile." -vcodec libx264 -crf 21 -acodec aac -ac 2 -ab 192000 -strict experimental -vpre hq -vpre veryfast -refs 3 -threads 4 -s 320x240 ".$newVideoFile, $output);
echo "Output:";
var_dump($output);
but when checking $output its always empty:
Output:array(0) { }
How do I check to make sure everything went ok?
You will have much more control using PHP's proc_open function. It allows you to write/read standard input/output in a very controlled way:
$tunnels=array(
0 => array('pipe','r'), // Process std input
1 => array('pipe','w'), // Process std output
2 => array('pipe','w') // Process std error
);
$io=array();
$resource=proc_open("command with parameters...etc",$tunnels,$io);
if(!is_resource($resource)) {
// Throw exception or something...
}
// Write to process standard input and close stream
fwrite($io[0],"Some data...");
fclose($io[0]);
// We are not interested in process standard output.. close it
fclose($io[1]);
// Get process std error
$errors=stream_get_contents($io[2]);
fclose($io[2]);
// Close process reousrce
$result=proc_close($resource);
if($result != 0) {
// There where errors. Grab the error string from $errors
}
