• Fix DTS:X (dtsx) track not being transffered by --audio-copy.
• Show AMF initialization failure in --check-hw.
• Fix error during E-AC3 encode finish.
• Add --muxer-add-cmd to write encoder options to encoding_tool in muxer metadata.
• Extend --audio-bitrate to allow specifying bitrate per channel layout (e.g. stereo:256,5.1:640).
• Linux: Simplify Linux packages.
• Linux: Fix GPU selection and OpenCL handling in normal encode.
• Linux: Fix AMF/Vulkan initialization and feature detection.
• Linux: Fix VapourSynth input reading.
• Linux: Fix possible SIGPIPE (141) exit in multi-GPU environment.
• Linux: Migrate build to meson.