HOWTO: custom parameters for ffmpeg

Sometimes it is necessary to add custom parameters for ffmpeg.
I used the method below to add http referrer (as it is currently unsupported by serviio) for radio streaming sites http://www.radiotunes.com/ and http://www.di.fm/

1. Copy attached ffmpeg.bat to serviio lib\ dir
2. Edit serviio\bin\ServiioService.exe.vmoptions, add new line
-Dffmpeg.location=<full path to ffmpeg.bat>
3. Restart serviio

That's it, you can use attached ffmpeg.bat as an example for any other processing.