Correct (--psnr argument manually in the additional options field.)
Thanks for your info, r0lZ. Yes, the last buffer param overwrites the first, but overwriting user defined params is annoying.
For reencoding I ever use level 4.0 because we REDUCE information to that level, otherwise I would use remux.
The 4.0 bandwidth is comparable with AVCHD, HDTV and very useful for streaming (WLAN!!) or beamers and old TV-players - no stuttering. And I can't see any quality disadvantage, seeking and handling is smooth.
Maybe you can set user defined params in an editable user line (hidden if you want). Like jdobbs in BD-Rebuilder does.
Once defined I want to use my own encoding params (user profile) for every transcode.
That would be a christmas gift for me...
EDIT: Solved by using "do not force" for the level parameter of x264 and using additional options.