Tuesday, January 28, 2025

• Change the rc-lookahead value for the nvenc-hevc video mode in transcode-video.rb from 32 to 20 per current Nvidia guidelines. A value of 32 is the maximum allowed but it's probably unnecessary.
• Add ratecontrol code for the nvenc-av1 video mode which functionally matches that of nvenc-hevc mode.
• Change the nvenc-av1 video mode quality value from 35 to 37. This will lower output bitrates below that of nvenc-hevc mode, a sensible move because AV1 format is supposed to be more size-efficient than HEVC at the same perceived level of quality.