[Libav-user] How to tell if a mp3 file was encoded with VBR?

[Hendrik Schreiber]

On Jun 5, 2013, at 7:56 PM, Andrey Utkin wrote:

> 2013/6/5 Hendrik Schreiber <hs at tagtraum.com>:
>> Is there an easy way to find out, whether an mp3 file (or any other codec for that matter) was encoded with VBR?
> 
> What about demuxing file to AVPackets, and then analyzing sum of their
> sizes within sliding timestamp window?

I was hoping for something easier :-)
Also, not having to scan through the entire file, would be preferable.

-hendrik