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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: BC on June 16, 2004, 11:36:38 AM

Title: FLAC Bug: Important to be aware of!!!!
Post by: BC on June 16, 2004, 11:36:38 AM

Hey all-

Mirth posted in the What the FLAC? thread about having a problem with FLAC encoding WAV's to all static. Also I have heard of some other people occasionally having problems.

I think sometimes FLAC installs wrong. When I first switched over to FLAC from APE I did some testing. I took 16/44.1 WAV files and did the following

1) WAV>SHN (generate MD5)
2) WAV>FLAC>WAV>SHN (generate MD5)

then I manually compared by eye the MD5's which should have been the same. Much to my surprise the MD5's were NOT the same, indicating that FLAC encoding was corrupting the original data!!!!     :o

So I  reinstalled FLAC from a different download source, after which it seemed to work fine, the MD5's from 1 and 2 were identical.   :)     

I think the bad version I got from somewhere linked to the etree site, and that the version that worked I downloaded directly from Mike Wren's site. Just wanted to let everyone know about this, I think this is a good test just to make sure your version of FLAC is working correctly.

Take care,
Ben

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: F.O.Bean on June 16, 2004, 12:08:37 PM

hmmm, interesting...

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: C.Clark on June 16, 2004, 03:13:35 PM

thanks for the heads up ben, i switched over to flac b/c mkwACT was crashing my computer and not running right, hmm. ???

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: mirth on June 16, 2004, 05:47:44 PM

Another problem I've had with FLAC have been that the resultant file was exactly the same size as the source WAV.

One thing to note is that all my recent issues with the software have been after I switched to using the latest CDWave as my recording app. Both instances were from files direct from CDWave, I don't *think* I've had problems encoding files that have seen post-recording edits in Wavelab. YMMV

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: C.Clark on June 17, 2004, 02:34:27 PM

and if you update to the lastest version of cdwave, you can just go straight flac as
your breaking your wav's up, thats what i do now, and only use frontend to fingerprint
my files now, it makes everything much easier and i have found no bugs or problems
with the flac encoder within cdwave

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: F.O.Bean on December 02, 2004, 08:05:26 PM

anybody done any testing to see which version was buggy?

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: nic on December 03, 2004, 09:02:08 AM

and Cooker wonders why I stay with Shorten. . .   ;)

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: Dr.FOB on December 03, 2004, 11:10:18 AM

Beware using CDWave>flac with 24 bit files.
My experience is that the resultant files, though they will decode properly, will be about the same size as the originals.  This certainly defeats the purpose of a codec.
Using the flac frontend has proven quite reliable for both 16 & 24 bits files.

Title: Re: FLAC Bug: Important to be aware of!!!!
Post by: F.O.Bean on December 03, 2004, 06:32:00 PM

yep, i always use flac frontend, so im not too worried