dvdplayer: fix audio codec ffmpeg, set buffer size correctly
Merge pull request #4045 from fritsch/pulseaudio-pr

AESinkPULSE: Be careful when using m_encodedRate fallback to sampleRate instead (fixes stereo upmix with pulse)
Merge pull request #4047 from FernetMenta/aefixes

dvdplayer: fix audio codec ffmpeg, set buffer size correctly
Strings: Update description and setting name for multi thread frame decoding
DVDVideoCodecFFmpeg: Disable hw acceleration when frame threading is enabled
Settings: Disable vdpau / vaapi / dxva2 / openmax if frame threading is selected
Settings: Move up FrameDec setting (change level)