Post your ffmpeg recipe here

This is the ffmpeg configuration I'm testing for use for Youtube videos:

ffmpeg -i input.avi -c:v libx264 -preset slower -crf 18 -bf 2 -flags +cgop -pix_fmt yuv420p -c:a aac -strict -2 -b:a 384k -r:a 48000 output.mp4

Feel free to post yours or your opinion on fine tuning it.

Use bit lower value for crf=15-17 (specially for HD) to get better quality (if you have good upload bandwidth).
If you have time preset slower is fine, if not you can use preset=fast. Quality will be the same for given CRF value, just bitrate will be bit higher.
You can also add -tune film to tune for typical camera shot footage with bit of grain/noise.

leveraging an Nvidia gpu for encoding.


h.264

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ffmpeg -i input.ext -c:v h264_nvenc -preset slow -profile:v high -level 5.1 -b:v 0 -cq 17 -bf 2 -flags +cgop -pix_fmt yuv420p -movflags +faststart -y -v quiet -stats output.mp4


h.265

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ffmpeg -i input.ext -c:v hevc_nvenc -preset slow -profile:v main10 -level 6.0 -tier high -b:v 0 -cq 17 -flags +cgop -pix_fmt yuv420p -movflags +faststart -y -v quiet -stats output.mp4