h264parse: default to byte-stream/nalu format (Annex B)
Submitted by Gwenole Beauchesne
Always default to stream-format=byte-stream,alignment=nalu if avcC format was not detected. This is not only the natural byte stream format specified in the standard (Annex B), but is also the fastest format to process on the decoder side. Indeed, with NALU alignment, scan for start codes could be avoided by taking the first GstBuffer from the input GstAdapter: this matches a complete NAL unit.