Blacking out a scene for a blu-ray file without converting

[Morgolking]

Hey I'm trying to have some blu-rays ripped by makemkv by way of mkvmerge and solveigmm avi + mkv trimmer; however, I need to find a way to black out some scenes while keeping the audio playing (basically cutting out nude scenes).

Does anyone know how to do this with the software I listed or by any other software that won't convert the video/audio so I don't lose audio/video quality.

Thanks in advance for your input.

[Baldrick]

Without reconverting it's very complex. You must cut, demux audio, convert a short black segment with exact same video properties, multilplex and join back everything...

[Sades]

Thanks, Baldrick!

What about changing the video via effects? Are there any recommendations on editing software that can alter the saturation, etc. of a point in a file without losing the audio/video quality in the rest of it?

[manono]

You can make subtitles where the background color, while usually transparent, is completely opaque and black. Then mux them into the video. That'll avoid having to reencode the video.