vaapi: fix potential segfault, squash me later
dvdplayer: get number of channels for active audio stream from audio player, ffmpeg demuxer does not update this info for codecs like AAC
ffmpeg demuxer: allow a stream change if pat/pmt was not seen on open
ffmpeg: adapt depreciated attribute max_analyze_duration
ffmpeg: fix deadlock caused by calling avctx->thread_count after codec_open
[builtins] don't activate an already active window
skin confluence: change channel group by clicking on channels or guide