Flac - Sep 2004 - [Flac-users] Settings to get the best compression

What are the settings that will give the absolute best compression?
It doesn't have to stream, and encodeing speed is not a factor.
I also don't care how long it will take to encode.

Thanks in advance,
Chris

Josh suggested to Chris:
>   flac --super-secret-totally-impractical-compression-level
Now it's not a secret any more!  (OK, to those who can read the code, it 
never was.)
> No joke,
The existence of the option isn't, but its performance pretty much is, 
as Josh admitted:
> ... but you will soon find out that it is not worth it and will go
> back to -8.  The -# options are already well tuned for CD audio.
No kidding.  I asked almost the identical question several months ago, 
and a member here [whose name I am embarrassed to forget -- first name 
might have been Miroslav?] suggested pretty much the same options as 
those to which --super-secret-totally-impractical-compression-level 
expands (just a different second value for -r).  Many of the .wavs did 
not compress as well as they had at plain old -8.  I finally got 
sufficient compression, surprisingly, by encoding at -8 and then zipping 
the .flac files together.

>No joke, but you will soon find out that it is not worth it
>and will go back to -8.  The -# options are already well tuned
>for CD audio.  If you are not encoding CD audio then reply
>back with the resolution and sample rate and we can go over
>it more.
If I need to encode 48khz, 16-bit, mono, do any of the default settings 
need to be changed?  Thanks.

-- Chuck

At 09:04 AM 6/12/2003 -0500, David W. Tamkin wrote:
>Josh suggested to Chris:
>
>>   flac --super-secret-totally-impractical-compression-level
>
>Now it's not a secret any more!  (OK, to those who can read the code, it
>never was.)
I tried it and found that -8 gave slightly better compression.

Jon

--- "Chuck H. Zhao" <chuck.h.zhao@sadbhuja.com>
wrote:
> 
> >No joke, but you will soon find out that it is not worth it
> >and will go back to -8.  The -# options are already well tuned
> >for CD audio.  If you are not encoding CD audio then reply
> >back with the resolution and sample rate and we can go over
> >it more.
> 
> If I need to encode 48khz, 16-bit, mono, do any of the default
> settings 
> need to be changed?  Thanks.
on a representative test clip, try experimenting with different
block sizes.  I would suggest

flac -8 -b 2304
flac -8 -b 4608
flac -8 -b 8192

if you find more than 1-2% difference in resulting size let us
know, maybe there's some way to improve the default settings in
this case.

Josh


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--- Chris <cl@enposte.net> wrote:
> What are the settings that will give the absolute best compression?
> It doesn't have to stream, and encodeing speed is not a factor.
> I also don't care how long it will take to encode.
  flac --super-secret-totally-impractical-compression-level

No joke, but you will soon find out that it is not worth it
and will go back to -8.  The -# options are already well tuned
for CD audio.  If you are not encoding CD audio then reply
back with the resolution and sample rate and we can go over
it more.

Josh


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Yahoo! Calendar - Free online calendar with sync to Outlook(TM).
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