transcoder: ignore unsupport encode profile when list target.
Below command line will ignore mp4.gep profile if video encoder can't support "preset=Profile YouTube". We should fall back to use normal video encoder.
gst-transcoder-1.0 -l
Below command line will ignore mp4.gep profile if video encoder can't support "preset=Profile YouTube". We should fall back to use normal video encoder.
gst-transcoder-1.0 -l