[flac-dev] Higher compression modes from Flake

Marko Uibo vinyylimees at gmail.com
Thu Mar 14 14:51:40 PDT 2013


Ühel kenal päeval (neljapäev, 14. märts 2013 22:06:02) kirjutas Martijn van 
Beurden:
> On 14-03-13 21:24, Declan Kelly wrote:
> > No. I want the tightest possible compression, while remaining 100%
> > compatible with the subset that all known FLAC decoders can successfully
> > stream or play now in cars, Hi-Fi units, "MP3 players" and cell phones.
> > The out and out most widely supported lossless audio format could (and
> > should) have a better "bang for the buck" to the average user (who has
> > possibly been tempted away from MP3 or WMV or some Apple format).
> 
> If you take a look at the comparison on the FLAC website you'll see that
> the gain going from -5 (the default setting) to -8 will save you about
> 0.5% of space (that's 1 in 200!) while encoding takes 4 times as long.
> 
> Trying to get more compression out of FLAC will only yield diminishing
> results. FLAC was designed to decode fast. That's one of the reasons it
> became popular, but also a constraint on how far it can be pushed.
> 
> If you really want to get the most out of FLAC, you should provide some
> patches (or hire someone to do it) that improve encoding within subset
> constraints. There's still one in-subset feature of the FLAC format that
> is not yet used, variable block length. Might get you 1% more
> compression at the cost of many, many hours of writing code and testing.
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Ok let's calm down. I asked about higher compression modes avaliable on flake 
because I wished to know is there any plan to support these modes someday or 
not. I wish to use refference implementation because I wish that my flac 
collection is usable after 20 years or more. Compression modes don't give any 
big compression difference but my collection is ~20 gb at the moment or 90 
albums. It gives 200 mb difference on me. I chooes flac because it is most 
popular codec MAC is not supported on linux, ALAC is not finished, optimFROG is 
not open.


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