9.14

• Add --vmaf support for Linux systems. ( #755 )
• Improve vapoursynth error messages.

9.13

• Improve multi-channel audio channel layout handling when encoding with --audio-codec. ( #671 )
• Update documents for Dolby Vision options (--dolby-vision-profile, --dolby-vision-rpu, etc.). ( #738 )

9.12

• Fix DTS:X (dtsx) track not being transferred by --audio-copy.
• Simplify Linux packages.

9.11

• Add option to append input command line parameters to encoding_tool in muxer metadata. (--muxer-add-cmd)
• Fix potential SIGPIPE(141) error termination in Linux multi-GPU environment.
• Fix error on finalization when encoding E-AC3. ( #706 )
• Avoid mixing GPUs with different B-frame availability when using --parallel.
• Migrate Linux build to meson.
• Linux packages will now not require ffmpeg lib packages as dependencies, and will include ffmpeg 8.0 libs.

9.10

• Add feature to set --audio-bitrate to different value depending on audio channels. ( #743 )

9.09

• Add support for Vapoursynth API V4. ( #747 )

9.08

• Add option to encode only when input audio codec differs from codec specified by --audio-codec. (--audio-encode-other-codec-only, #743)
• Remove restriction on dolby vision output. ( #738 )

9.07

• Fix error when encoding H.264 for RTMP/FLV output.
• Fix mkv output failure when encoding with -c av_libsvtav1. ( #733 )
• Add option to show preset/tune parameters (--check-preset-params). ( #733, #735 )

9.06

• Fix --vpp-resize bilinear,spline*,lanczos* creating artifacts depending on resize ratio. ( #698, #737 )

9.05

• Add option to enable unidirect B frame for lossless encoding (--unidirectb). ( #731 )
• Add tune option. (--tune, #733, #729, #709, #679, #583)
• Change --ref default to 4(H.264)/5(HEVC,AV1).
• Now defaults for options below should differ by --preset and --tune.
  • --weightp
  • -b, --bframes
  • --strict-gop
  • --no-i-adapt
  • --no-b-adapt
  • --aq
  • --aq-temporal
  • --aq-strength
  • --nonrefP
  • --lookahead
  • --lookahead-level
  • --tf-level
  • --temporal-layers
• Add option to fallback to 8bit encoding when 10bit encoding is not supported by the hardware.(--fallback-bitdepth)