Added trace log if get error reading raw audio channel, typically a sound channel.
Moved initialisation of SDL (and camera grabber) in video test to background thread. This is due to SDL (sometimes) locking up waiting for the main thread to handle some windowing message on Mac platform.
Removed audio resampler/convereter from default gstreamer pipeline. User can add it if needed, but it is usually not necessary and interferes with transmitted packet sizes.
Added comand line argument in standard console mode applications to set jitter buffer size.
Added GStreamer to "C" API.
Fixed incorrect documentation