I was wondering the same thing recently because my nvidia captures videos took like 1 TB of space on my main PC. I wanted to compress them by switching to H265. In FFMPEG there's no simple option like "loseless compression", you always have to enter manually the bitrate or quality. Rendering a bunch of videos with different bitrates and trying to compare them to see if there's a significant differene is a really long and annoying process. I gave up and just burnt everything to bluray instead.
I was wondering the same thing recently because my nvidia captures videos took like 1 TB of space on my main PC. I wanted to compress them by switching to H265. In FFMPEG there's no simple option like "loseless compression", you always have to enter manually the bitrate or quality. Rendering a bunch of videos with different bitrates and trying to compare them to see if there's a significant differene is a really long and annoying process. I gave up and just burnt everything to bluray instead.