I'm currently testing the GStreamer audio framework and it's capabilities. My goal would be to write a basic radio automation system which can handle the scheduling of audio track mixing and stream the result to a media server like Shoutcast.
I like to add some post processing to the final mix before sending it to the encoder. Although GStreamer has some plugins to make something like this, i like to use an external processor which focuses on radio audio processing. It's a CLI executable which reads PCM samples from STDIN and writes the processed output to STDOUT. I haven't found a plugin which can invoke such an executable and transfer the samples to and from it.
Is it possible to achive something like this with GStreamer?