• Add XPSNR support as a VMAF alternative.
  • Add sample-encode --xpsnr arg which toggles use of XPSNR instead of VMAF.
  • Add crf-search, auto-encode --min-xpsnr arg (alternative to --min-vmaf).
  • Add xpsnr command for measuring XPSNR score.
• Support negative --preset args.
• Add --vmaf-fps: Frame rate override used to analyse both reference & distorted videos. Default 25.
• Omit data streams when outputting to matroska (.mkv or .webm).
• Omit audio, subtitle & data streams in VMAF calls to work around possible ffmpeg memory leaks.
• mpeg2video: map --crf to ffmpeg -q and set default crf range to 2-30.