This is quite bizarre. When I set Bandicam to record as .MP4, I don't get the option to use external codecs such as x264vfw.
When I do it in .avi mode, the output is unusable since it is, in fact, an .mp4 file.
Same goes for audio, It's set as .MP3 but Bandicam save it as .wav. It doesn't even give me the option to use AAC as well.
Is this some sort of glitch or is there a reason you can't use external codecs when outputting MP4 files?