[MEncoder-users] Runtime Incorrect

[Joey Parrish]

On 5/14/07, Nitin Jain <nitinj1981 at gmail.com> wrote:
> On 5/12/07, Joey Parrish <joey.parrish at gmail.com> wrote:
> > Nitin, are your mp3's VBR, ABR, or CBR?
>
> They were CBR. Tried a few VBR ones right now, and ID_LENGTH field
> comes out arbitrary (tried to see if the HEX versions had some
> connection, but couldn't find any)..

IIRC, the length of the mp3 is not encoded anywhere in the header.
Only bitrate.  So for CBR, bitrate and file size can determine play
length.  Not so for VBR without an accurate average bitrate.

--Joey