• Add new denoise filter --vpp-msmooth.
• Add new sharpend filter --vpp-msharpen.
• Add quality metric evaluation using Vship. (--vship-ssimulacra2, --vship-butteraugli, --vship-cvvdp)
• Add sigmoid-related options and input colorspace specification to --vpp-libplacebo-shader.
• Display warning when using --vpp-libplacebo-shader in conditions requiring res specification are detected.
• Minimize latency with --lowlatency.
• Fix subtitles not being passed to vpp-subburn when no audio processing is performed. ( #756 )