>>298369660
You can switch to NVENC encoding in OBS which is probably the same as geforce experience then. By default obs uses x264 cpu encoding, which might be tuned to low quality for lower cpu usage by default.

Use handbrake to reencode, it's just a GUI frontend to ffmpeg if you don't want to fiddle with the command line yourself. You're still going to get some generation loss though. It's weird that vegas doesn't support .mkv, it's a standard container for h264 video. you can remux to mp4 without reencoding or loss though, if that's all it wants.

I ocassionally use shotcut to do any fancier editing, but generally I just use ffmpeg -ss -to options to cut videos, or streamable's built-in editor.