[Feature Request] Lossless encoding

[ShortyCM]

Being able to use x265 lossless encoding will likely be useful in some cases. This may or may not work:

master...ShortyCM:video2x:master
k4yt3x/video2x-qt6@master...ShortyCM:video2x-qt6:master

I'd test it myself but don't currently have any dev tools installed yet after a recent Windows do-over, and not sure when I'll have time to get all that installed, too.

[k4yt3x]

I've closed the two PRs for now. I appreciate your work, though I'd like to implement something that's more versatile if anything were to be added. See my comments in the PRs for more detail.

[k4yt3x]

Implemented in 3215c89.

You can now specify any AVOptions with --extra-encoder-option, -e. For setting libx265 lossless to 1, do -e x265-params=lossless=1.

This will be included in the next release. I'll consider when to add full support of this in the GUI.

[k4yt3x]

Another screenshot just to show the currently supported encoder options:

[k4yt3x]

I'll also leave this here. Full change for this implementation:

https://github.com/k4yt3x/video2x/compare/169509b..HEAD