how can convert mp3 to ogg by php?

Question

I'm using windows 7 and xampp in localhost.I want to convert mp3 audio into ogg audio by php script.I downloaded 'ffmpegConverter_v0.2' zip file where the folder structure is :

ffmpegConverter_v0.2
  --consoleConversor
      --consoleConversor
      --consoleConversor.exe
      --ffmpeg.dll

  --consoleMonitor
      --consoleMonitor
      --consoleMonitor.exe
      --ffmpeg.dll
      --Queue.xml

  --serviceConversor
      --ffmpeg.dll
      --serviceConversor
      --serviceConversor.exe

  --serviceMonitor
      --ffmpeg.dll
      --Queue.xml
      --serviceMonitor
      --serviceMonitor.exe

  --LEEME.txt
  --README.txt

I keep the 'ffmpegConverter_v0.2' folder,mp.php and 'a.mp3' in same folder and used the following code in mp.php:

<?php    
exec("ffmpegConverter_v0.2\serviceConversor\serviceConversor.exe -i a.mp3 -acodec libvorbis ap.ogg");
?>

then got the following error message :

what wrong did I do ? whats the exact way to install ffmpeg ? whats the exact way to write the command in php script for that and how can that be used in online server ? is there any other better converter else ?

-Thanks.

EDIT:

when I used the following line

<?php
 exec("ffmpegConverter_v0.2\consoleConversor\consoleConversor.exe -i a.mp3 -acodec libvorbis ap.ogg");
?>

then I got this message

I also tried this :

<?php   
exec("c:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe serviceConversor.exe"); 
exec("ffmpegConverter_v0.2\serviceConversor\serviceConversor.exe -i a.mp3 -vcodec libtheora -acodec libvorbis ap.ogg");
?>

then got the same message like the first picture.

Answer 1

Forget about that serviceConversor thing.

Get an FFmpeg build for Windows (a static build that matches your architecture should be a good start to avoid other DLL/etc. problems).

Then use exec:

<?php
    $retCode = exec('C:\\path\\to\\ffmpeg.exe -y -i file.mp3 -acodec libvorbis file.ogg');
?>

Don't forget to escape the backslashes (\\); you didn't in your question.

exec will return the return code of FFmpeg (I put it in $retCode here), which is 0 for a success.

As some noted, you can add the -aq option to set the OGG output quality for a VBR transcoding.

libvorbis is built in the static FFmpeg version; I just checked using ffmpeg.exe -codecs:

DEA.L. vorbis               Vorbis (decoders: vorbis libvorbis )

where DE means decoding and encoding are supported for this codec.