What i am looking for is to compare encoded mp3's ( 96vbr & 320vbr of the same feed ) and determine minimum "acceptable" bitrate for a specific feed/sound file without listening to every audio file. I need this for h264, portable media ( 300-400MB of h264 ) - so I do not want to end up with 2 hour "spoken/monologue" content encoded at 256kbit and 64kbit encoded classical music. by running EncSpot Pro or re-encoding it via lame, it is possible to tell what lowest bitrate/quality would be "acceptable" for a specific audio file, once determined, encode, mux and it is ready.
a shell utility would be perfect since it could be used for batch/automated minimum bitrate discovery. basically an app which detects the characteristics of audio...
I tried mp3check, mp3info, MP3Diags, mediainfo and lame
shows bitrate switching info ( VBR/ABR ), useful, but it creates a 65MB output ( for 4 min content ) and it would be quite inefficient to run it against 2h content, parse and (....) and return the stats
so far EncSpot pro and its "bit histogram" shows most info I need - runs under wine... still looking for a shell alternative