[MPlayer-users] VBR mp3 audio in .avi - how to check

Piotr Krukowiecki piotr at pingu.ii.uj.edu.pl
Tue Sep 3 11:01:02 CEST 2002

On Sun, Sep 01, 2002 at 10:59:09PM +0200, Arpi wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi,
> > Is there easy way to check with mplayer if audio track in .avi was
> > encoded with VBR or CBR?
> easy? no.
> mplayer -v -v file.avi should dump the index, if XXwb sizes are equal it's cbr

you mean "len"? 

If len changes are very small, or not happen often, is it still VBR?
For example, 
[40 lines of len X]
[one line of len X+(small value)]
[40 lines of len X]

Could mplayer detect if audio is encoded using VBR and print avg

Why am i asking: mplayer prints line like:
AUDIO: 48000 Hz, 2 ch, sfmt: 0x10 (2 bps), ratio: 4000->192000 (32.0
which would mean that audio was encoded using 32kbps which is quite low,
but in fact that audio was encoded in VBR and avg bitrate is probably
much higher (or bitrate in VRB encoded doesn't mean so much).


Piotrek (@ ~) 
Mors Drosophilis melanogastribus!

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