No Audio Bitrate Information In MKV

[xblek]

When I make mkv (for example DVDRip) I can see AudioStream BitRate for AC3 and Auto Passthru audio setting only.
In MediaInfo, MediaInfo Mac, VLC etc.

But to set the audio to AAC (CoreAudio, faac, ffmpeg) I can never see this value in MediaInfo, MediaInfo Mac, VLC etc.
It is possible to do something with this please?
I think that is a common problem for win and mac.

See
viewtopic.php?f=11&t=24710&p=113607&hil ... fo#p113607

But in mp4 is everything alright. Rich audio info - see pictures.

thank you