HEre's the profiles for 2.3.12 or later:
[MP4 Unprocessed]
Description=Creates MP4 files by copying the video directly. It does not resize, remove black bars, deinterlace your videos or select audio language. Use this if you have high quality HD recordings which don't need processing.
order=copy,ffmpeg
copy-remuxto=.mp4
copy-audiodelay=skip
ffmpeg-general=-threads 0
ffmpeg-video=-ss 3 -vcodec copy -map 0:a -map 0:v
ffmpeg-audio=-acodec copy
ffmpeg-audioac3=-acodec copy
ffmpeg-ext=.mp4
ffmpeg-audiodelay=skip
FixedResolution=true
SkipCropping=true
AllowH264CopyRemuxing=true