Properties of ALAC in mp4

Lukáš Lalinský lalinsky at
Wed Jun 8 20:21:26 CEST 2011

On Wed, Jun 8, 2011 at 7:40 PM, Frank Lai <frank.franklai at> wrote:
> The alac format info is
> from
> Test an alac file encoded by iTunes. The bitrate is correct. But test
> another alac file encoded by FFmpeg, the bitrate is 1411 kbps.
> Found a link discussing this
> issue
> Looks like FFmpeg did not fill the bitrate value correctly. But other
> applications (except iTunes) can report the correct bitrate, so there should
> be another way to calculate the bitrate.

Ah, if it's a FFmpeg bug then I'm happy with it. I've committed a test
file to the repo, any chance you could encode it using iTunes for me?


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