tsdemux: Fix AC-4 detection
This regression was introduced by gst-plugins-bad!1102 (merged) and has been present since 1.18
- Stream Type 0x06 is defined in the base mpeg-ts specification as Private PES Packets. Determining the content should be solely based on descriptors found within the PMT.
- This was abused in that commit by defining a "bluray-only" stream type for AC4
:
ST_BD_AUDIO_AC4
- This should be entirely handled in the regular private pes handling further down in the code
Fixes #1154 (closed)