I'm using PHP exec command in order to convert videos by avconv linux library:
exec("avconv -i $mp4FilePath -acodec libvorbis -aq 5 -ac 2 -qmax 25 -threads 2 $webmFilePath > /dev/null &" , $output, $return);
echo PHP_EOL . 'Script output: ' . $return . PHP_EOL;
die;
Now When I run the php script the output is:
developers
built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/html/domain/videos/avIBS0ZJmjCQBZV7eWqSWSe0u8lBgRCc.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2014-09-08 00:58:51
Duration: 00:02:50.38, start: 0.000000, bitrate: 414 kb/s
Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 640x360 [PAR 1:1 DAR 16:9], 315 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
Stream #0.1(und): Audio: aac, 44100 Hz, stereo, fltp, 95 kb/s
Metadata:
creation_time : 2014-09-08 00:58:51
[libvpx @ 0x17bb220] v1.3.0
Output #0, webm, to '/var/www/html/domain/videos/avIBS0ZJmjCQBZV7eWqSWSe0u8lBgRCc.webm':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2014-09-08 00:58:51
encoder : Lavf54.20.4
Stream #0.0(und): Video: libvpx, yuv420p, 640x360 [PAR 1:1 DAR 16:9], q=-1-25, 200 kb/s, 1k tbn, 24 tbc
Stream #0.1(und): Audio: libvorbis, 44100 Hz, stereo, fltp
Metadata:
creation_time : 2014-09-08 00:58:51
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libvpx)
Stream #0:1 -> #0:1 (aac -> libvorbis)
Press ctrl-c to stop encoding
frame= 4089 fps= 21 q=0.0 Lsize= 7151kB time=170.38 bitrate= 343.8kbits/s
video:5288kB audio:1751kB global headers:4kB muxing overhead 1.538016
When Script has run and conversion is successful it waits at the last line nothing happens and echo command not executed, my script waiting for a signal to stop (I think so). When I press enter I will get back to shell.
Why return output is not printed out? How can I check whether video conversion was successful or not then?
EDIT 1:
When I removed > /dev/null &, I could see that script has ended successfully and $return has returned 0 for successful conversion (if I'm wrong correct me). But $output is an empty array. While I could see the whole output in shell that I've shown above. I want to log this whole data into log file.
First of all I removed > /dev/null & in order to be able to get back to terminal after script work is finished. And then to get the avconv output inside of $output I appended 2>&1 to the end of the script.