10f72da504
Some streams have 2 PMT sections in a single TS packet. The first one is "valid" but doesn't contain/define any streams. That causes an unrecoverable issue when we try to activate the 2nd (valid) PMT. Instead of doing that, pre-emptively refuse to process PMT without any streams present within. We still do post that section on the bus to inform applications. Fixes #1181 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2310>