[FFmpeg-devel] 24-bit ALAC decoder, concerns of the ALAC encoder

Jai Menon jmenon86
Tue Sep 8 17:37:56 CEST 2009

On Tue, Sep 8, 2009 at 4:12 AM, David Hammerton<davidjdh at gmail.com> wrote:
> Hi all,


> While I'm writing here, I have a minor concern with the ALAC encoder
> distributed with ffmpeg, and I'd like someones feedback on this. It seems to
> me that the ALAC encoder source bears similarity to that of the ALAC
> decoder. It seems to me plausible that the encoder is derived work from the
> decoder. If this is the case, and let me stress the 'if', then the license
> requirements of the decoder may have been breached. Could someone please
> take a look at this and, if necessary, take steps to rectify the problem?
> The license terms of the ALAC decoder can be found at
> http://craz.net/programs/itunes/alac.html, and explicitly mention that "The
> above copyright notice and this permission notice shall be included in all
> copies or substantial portions of the Software."

But ffalacenc doesnt include "substantial portions" of the alac
decoder? The code was written from scratch. Please check the versioned
history at [1]. Also, the mathematics is essentially same, so maybe
you want to elaborate on what exactly you feel has been copied
wholesale from your code.

[1] svn://svn.mplayerhq.hu/soc/alacenc



More information about the ffmpeg-devel mailing list