flac dev - Oct 2008 - Support for CAF in flac command-line?

Brian Willoughby <brianw at sounds.wa.com> wrote:
> Hello all,
>
> Is anyone here potentially up to the task of adding support for CAF
> (the CoreAudio Format) into the flac command-line?
...
> I've already made some recordings
> that are so long that they cannot be uncompressed from FLAC to WAV or
> AIFF because they would exceed 4 GB - the maximum file size for those
> formats.  CAF does not have the same 4 GB limitations.
Erik de Castro Lopo <mle+la at mega-nerd.com> wrote:
...
> Whats more, the sndfile-convert program can also convert
> from FLAC to the following file formats that support 63 bit
> file offsets:
>
>    Au, Caf, rf64, w64
I am glad somebody mentioned RF64.
Supporting RF64 instead of CAF would solve
Brian's problem equally well, and would be the
natural extension to supporting WAVE.

Regards,
Martin
-- 
Martin J Leese
E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/

RF64 support sure would be nice, but it wouldn't really help to do  
this "instead of" CAF.  For one thing, Logic Studio Pro does not seem
to support RF64, because the manual states that WAVE and BWF are  
limited to 4 GB.  CAF may be a format which lacks universal support,  
but RF64 is also very limited in usefulness.  Treating either one as  
a substitute for the other is not going to help.

Personally, I'd welcome support for either or both.  With an open- 
source project like this, I'm not going to complain about any added  
features, so long as we all understand that there is no substitute  
for CAF.

Brian Willoughby
Sound Consulting


On Oct 13, 2008, at 08:59, Martin Leese wrote:

Brian Willoughby <brianw at sounds.wa.com> wrote:
> Hello all,
>
> Is anyone here potentially up to the task of adding support for CAF
> (the CoreAudio Format) into the flac command-line?
...
> I've already made some recordings
> that are so long that they cannot be uncompressed from FLAC to WAV or
> AIFF because they would exceed 4 GB - the maximum file size for those
> formats.  CAF does not have the same 4 GB limitations.
Erik de Castro Lopo <mle+la at mega-nerd.com> wrote:
...
> Whats more, the sndfile-convert program can also convert
> from FLAC to the following file formats that support 63 bit
> file offsets:
>
>    Au, Caf, rf64, w64
I am glad somebody mentioned RF64.
Supporting RF64 instead of CAF would solve
Brian's problem equally well, and would be the
natural extension to supporting WAVE.

Regards,
Martin

Brian Willoughby wrote:
> RF64 support sure would be nice, but it wouldn't really help to do  
> this "instead of" CAF.
This pre-release of libsndfile supports both:

    http://www.mega-nerd.com/tmp/libsndfile-1.0.18pre24e.tar.gz

Erik
-- 
-----------------------------------------------------------------
Erik de Castro Lopo
-----------------------------------------------------------------
"If trees could scream, would we be so cavalier about cutting them
down? We might, if they screamed all the time, for no good reason."
-- Jack Handey

--- Martin Leese <martin.leese at stanfordalumni.org> wrote:
> Brian Willoughby <brianw at sounds.wa.com> wrote:
> > Hello all,
> >
> > Is anyone here potentially up to the task of adding support for CAF
> > (the CoreAudio Format) into the flac command-line?
> ...
> > I've already made some recordings
> > that are so long that they cannot be uncompressed from FLAC to WAV
> or
> > AIFF because they would exceed 4 GB - the maximum file size for
> those
> > formats.  CAF does not have the same 4 GB limitations.
> 
> Erik de Castro Lopo <mle+la at mega-nerd.com> wrote:
> ...
> > Whats more, the sndfile-convert program can also convert
> > from FLAC to the following file formats that support 63 bit
> > file offsets:
> >
> >    Au, Caf, rf64, w64
> 
> I am glad somebody mentioned RF64.
> Supporting RF64 instead of CAF would solve
> Brian's problem equally well, and would be the
> natural extension to supporting WAVE.
BTW current flac in CVS supports RF64 and wave64; they will be
in the next release.  I'll have to look into CAF.

On Sat, Nov 29, 2008 at 2:20 PM, Josh Coalson <xflac at yahoo.com> wrote:
> --- Martin Leese <martin.leese at stanfordalumni.org> wrote:
>> Erik de Castro Lopo <mle+la at mega-nerd.com> wrote:
>> ...
>> > Whats more, the sndfile-convert program can also convert
>> > from FLAC to the following file formats that support 63 bit
>> > file offsets:
>> >
>> >    Au, Caf, rf64, w64
>>
>> I am glad somebody mentioned RF64.
>> Supporting RF64 instead of CAF would solve
>> Brian's problem equally well, and would be the
>> natural extension to supporting WAVE.
>
> BTW current flac in CVS supports RF64 and wave64; they will be
> in the next release.  I'll have to look into CAF.
Core Audio Format (CAF) is from Apple, visit:
http://developer.apple.com/documentation/MusicAudio/CoreAudio-date.html

I have never tried to code CAF, but my guess
is that it will be a lot more work than the
successors to WAVE.

Regards,
Martin
-- 
Martin J Leese
E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/