Check for reparent.
Quickly changing workspace and back while recording under i3 breaks the screen recorder. i3 probably unmaps windows in other workspaces.
See https://trac.ffmpeg.org/wiki/EncodingForStreamingSites for optimizing streaming.
Add option to merge audio tracks into one (muxing?) by adding multiple audio streams in one -a arg separated by comma.
Look at VK_EXT_external_memory_dma_buf.
Allow setting a different output resolution than the input resolution.
Use mov+faststart.
Allow recording all monitors/selected monitor without nvfbc by recording the compositor proxy window and only recording the part that matches the monitor(s).
Allow recording a region by recording the compositor proxy window / nvfbc window and copying part of it.
Use nvenc directly, which allows removing the use of cuda.
Handle xrandr monitor change in nvfbc.
Add option for yuv 4:4:4 chroma sampling for the output video.
Implement follow focused in drm.
Support fullscreen capture on amd/intel using external kms process.
Support amf and qsv.