Editing 4K videos without losing quality?

[EchelonV]

Now that I have a OLED I'm enjoying upgrading and hunting for some 4K videos out there. But as some probably know these files add up really fast and for porn, there's some redundant parts in long scenes I wouldn't mind cutting out. If I can re-encode/save the file again without losing any of the original quality. Is that doable in some free software?

I've used kdenlive for my custom stuff up until now but I don't think it supports 4K yet.

[plasmus]

Avidemux (for example) is able to do this, but only if the cuts are set on key frames.

Depending on the video there may be a key frame only every 10 seconds. Some codecs detect scene changes though and set additional key frames, where one would normally make a cut, but that's rare.

You can make frame accurate cuts, regardless if they are on key frames or not, but that requires a re-encoding of the video. It's not fatal, though a copy will never be better than the original.

Hope this is helpful.

Cheers!