Look for XING or VBRI headers, it would give the # of frames. From that you
can calculate the song duration.
On 3/15/06, c.s.srinivasan <[EMAIL PROTECTED]> wrote:
>
>
> All,
> I am developing an application to play MP3 files encoded with VBR content.
> For this purpose,it is required to know the number of frames in the mp3
> file
> to calculate file time duration and also for rewind,forward functionality.
> I understand that since VBR does not have fixed bitrate on a frame basis
> it
> is difficult to
> calculate file duration.One approach would be to find the syncword and
> hence
> the bitrate
> in the frame header for each frame and build a table of frame sizes.
>
> However in a embedded application (say a mp3 player on a mobile),this
> takes
> relatively considerable complexity.So a technique with reasonable real
> time
> complexity
> is preferred.
> Any pointers on a better technique to handle this problem would be
> appreciated.
>
> Regards,
> C.S. Srinivasan
>
>
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