[Flac-dev] compression

2008-02-20 Thread Harry Sack
hi

can we expect much better compression (like the step to v. 1.2.x) in
future versions of the flac encoder or are we at maximum compression
level now?

thx
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[FLAC] OS/2

2008-02-07 Thread Harry Sack
hi,

Is there anybody who tested flac and metaflac on OS/2 Warp 4 or is there
anybody who can tell me if it will work on OS/2?

thx

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[Flac] compression level

2008-01-17 Thread Harry Sack
hi

I was wondering how many difference in % of cpu load (on same cpu) exists
between compression level 1 and 8 while decoding. Also same question for
encoding.
Is the difference in % of cpu load while decoding/encoding the reason
different compression levels were created or another reason?

thx

-- 
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when you do, it blows away your whole leg.'
--Bjarne Stroustrup, The Creator of C++

'And so at last the beast fell and the unbelievers rejoiced. But all was not
lost, for from the ash rose a great bird. The bird gazed down upon the
unbelievers and cast fire
and thunder upon them. For the beast had been reborn with its strength
renewed, and the
followers of Mammon cowered in horror.' --From The Book of Mozilla, 7:15
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[flac] decoding with -F

2007-10-24 Thread Harry Sack
hi flac list,

I read on the site about the decoding -F (or --decode-through-errors)
feature:

' By default flac stops decoding with an error and removes the partially
decoded file if it encounters a bitstream error. With -F, errors are still
printed but flac will continue decoding to completion. Note that errors may
cause the decoded audio to be missing some samples or have silent sections.'

So is it true that when decoding with -F option, there are only 3
possibilities:

- the decoded sample is error-free and is added to the WAV file
- the decoded sample has an error but instead this sample is not added to
the WAV file (so it's just thrown away)
- the decoded sample has an error but instead a silent sample is added to
the WAV file (so you can hear in fact silence when there are a lot of
samples of this kind directly after each other)

is this above correct or are there more situations that can occur in the
case of corrupted flac files you want to decode using -F?

thx in advance
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Re: [flac] md5 checksum

2007-10-19 Thread Harry Sack
2007/10/19, Josh Coalson [EMAIL PROTECTED]:

 --- Harry Sack [EMAIL PROTECTED] wrote:
  hi
 
  here some questions about the md5 checksum:
 
  - what happens when the md5 checksum of the decoded audio is
  different
  of the internally stored checksum due to file corruption ? Will
  playing/decoding still be possible (with some error frames) or will
  playing /decoding be not possible at all (so all audio data is lost)?

 md5 does not affect decoding at all, it is a just a checksum to
 tell you at the end if it matches the whole audio or not.



thanks for the answer, but then there is wrong information on some sites
that tell about flac :s.
There is written the flac decoder doesn't decode the audio at all when the
md5 checksum doesn't match.

 - what happens when the metadata blocks get corrupt? will the audio
  part still be decodable even when non-audio blocks are corrupt?

 yes

  - since there is only a md5 checksum on the audio blocks itself, what
  happens when some wav metadata gets corrupt and you want to decode
  that data? How can the decoder detect it's corrupt or not because
  there is no md5 checksum for this data?

 depends on the corruption, some kinds are recoverable, some are not.
 read the format spec first and it should become clear.



Why is there no md5 checksum on the WAV metadata? Because how can flac
otherwise be called a 'lossless' codec when the metadata of the WAV file
can't be guaranteed 100% identical to the original, when there is file
corruption, because there is no md5 checksum on it?

thx
Harry

Josh


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[flac] maybe include new win32 frontend?

2007-10-17 Thread Harry Sack
hi flac developers,

A user here gave me a link to an amazing win32 frontend for flac (and also
other encoders): Trader's Little Helper (http://thor.prohosting.com/roh0205/
)

Maybe this frontend can be added to the win32 flac installer instead of flac
frontend?

I see many good reasons for this:
- flac frontend isn't really updated anymore, while Trader's Little Helper
is updated frequently
- this frontend solves all limitations the current flac frontend has
- this frontend even allows creation of ffp files and verifying using ffp
files by verifying if the checksums in the ffp file match the ones in the
flac file header and also by verifying if the checksum of the uncompressed
data matches the one in the flac file header: so a full verify (the current
flac frontend doesn't allow verifying using ffp files)
- it even has a GUI feature to fix sector boundary errors
- ... much more (just check the program)

I would love to hear the opinion of Josh to this.

thx in advance
Harry
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[flac] flac fingerprint

2007-10-14 Thread Harry Sack
hi,

i found this explanation of the flac fingerprint somewhere:

'A FLAC Fingerprint is generated only for the audio data portion of
the file. (Therefore, changing the filename or the tags or
FlacMetadata does not change the fingerprint calculation.) In
contrast, an .md5 is generated against the whole file, including
header portions.'

so i was wondering what advantages it could give me to make a ffp
file, because there is already a internally stored md5 checksum on the
decoded audio data inside the flac file? What extra advantage does a
ffp file give me while only considering the need to verify the audio
data.

i was also wondering how files encoded by using the new
--keep-existing-metadata option are verified when using -verify. Is
there a separate internally stored md5 for metadata next to the md5
for decoded audio data or how is everything verified?
Is making a ffp file for such files also possible for the non-audio
data (so all metadata)?

i hope somebody can make this more clear, because it's rather confusing.

i was also wondering if there exists a GUI program for win32 to verify
flac files using a ffp file (so not md5check.exe)

thx in advance
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[Flac] flac streaming server

2007-10-08 Thread Harry Sack
hi

i'm looking for a flac streaming server for win32.
can anybody point me to the best servers there are?
what clients support flac streaming to connect to my server (also win32)?

to the flac dev's: what network speed would be required to stream cd
audio compressed flac files without hearing gaps in the music?

thx in advance!
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Re: [flac] re-encode tool win32

2007-09-28 Thread Harry Sack
2007/9/28, Aaron Whitehouse [EMAIL PROTECTED]:

   Under linux/bash, it would be something like
  cd /MusicDirectory
  find . -type f -name *.flac  -exec sh -c 'flac -t {}  flac -8V {}'
 \;

 Wouldn't it be nice if it was something closer to:
 flac --reencode --recursive -8 *.flac



I think this would be a great feature, in this way re-encoding in windows,
linux, ... can happen the same way without complicated scripts (that maybe
even don't work in windows because of crappy wildcard support, ...)
are there plans to implement this? It's a clean way to re-encode all files I
think.

Harry

Aaron

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[Flac] win32 installer 1.2.1a vs 1.2.1b

2007-09-25 Thread Harry Sack
hi

I have just downloaded the win32 installer 1.2.1b and uninstalled my
previous version 1.2.1a.
But I don't see any difference in both installers: they both have flac
frontend and flac tester and the command line tools flac.exe and
metaflac.exe. So can somebody tell me please what the difference is between
1.2.1a and 1.2.1b?

thx
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[Flac] win32 installer

2007-09-23 Thread Harry Sack
hi

are there other people who have trouble with the win32 installer? When I try
to install it to windows 98 it crashes when run.

thx
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[Flac] installer

2007-09-23 Thread Harry Sack
hi

what windows versions are supported by the win32 installer?

are there plans for a linux installer (statically linked lib's)?

thx
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[Flac] flac: wav64 support

2007-09-19 Thread Harry Sack
hi

does the flac encoder officially supports wav64?
i have a big collection of wav64 files (26 TB for each file and
bigger) but didn't had the courage to encode them with flac.
Cpu power is no problem (i have intel V8) but i just want to know if
flac supports wav64 or not as input
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[Flac] Flac: metadata

2007-09-18 Thread Harry Sack
hi

is compression of metadata of the wav file enabled by default or only
when using explicitly the new command line option in v1.2.1?

thx
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[Flac] flac installer

2007-09-17 Thread Harry Sack
hi

the new flac installer does not work: when you install it (I have windows
98) it just crashes no matter how many time you try to install it
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Re: [Flac-dev] Re: multiple core support

2007-09-10 Thread Harry Sack
2007/9/9, Josh Coalson [EMAIL PROTECTED]:

 --- Harry Sack [EMAIL PROTECTED] wrote:
  2007/9/8, Josh Coalson [EMAIL PROTECTED]:
  
   it actually is complicated.  the libFLAC api is not suited to a
   multithreaded design because the i/o is stream-based, not file-
   based.  flac(.exe) is the file-based wrapper around libFLAC that
   allows it to work on files.  the way libFLAC buffers data is also
   impossible to parallelize without significantly changing the api.
 
  why was this approach used?

 because the tradeoffs I described required for arbitrarily parallel
 encoding significantly complicate the api and implementation.
 libFLAC was not design for multicode file encoding on PCs, it is a
 reference design that is also being used in embedded devices running
 100MHz, low memory, all kinds of different OSes, etc.



euh :) Just make a flag or something in the api that enables the code for
low cpu power devices and/or streaming and disable this when encoding on
fast pc (so no streaming)? So it uses file based code then for encoding of
files on pc's with multiple cpu's and stream based code for all other
devices and streaming :)
Then you have both in the API!

 The API design seems to me not very smart
  because it's not flexible and you're stuck in the future (like now
  for multiple core support)
 
  I don't see any reason why you wouldn't make it all based on files
  and not on streams :s It's just a major disavantage in my opinion

 an api cannot be all things to everyone.



sure it can: you just have to make some different cases (low cpu power
device/streaming or multi-core cpu) and call the apprioprate functions




you keep making this
 assertion but if you actually tried to implement it (and I hope
 you will) the problems we are all bringing up will quickly become
 obvious.

 your own lame-mt example is not an incremental improvement but a
 significant rewrite of lame (and also does not have nearly the
 performance advantage of process-level parallelism, see
 http://www.hydrogenaudio.org/forums/index.php?showtopic=50862)


It's multi-threaded and that's what I mean: people here say an audio codec
can't be written multi-threaded and it will give no performance boost:
1) that's false: se LAME MT
2) performance boost up to 30%: see LAME MT again

For very large files you must wait not so long before it's encoded vs. the
original LAME.

  it would take a specialty file-based encoder using an independent
   frame encoder to do and even that is not trivial.
 
  so we can assume that those API changes will never come and the flac
  encoder will never have multiple core support?

 you can assume libFLAC will probably not have it.  if you can modify
 libFLAC to make a multithreaded encoder like flac-mt that would be
 neat and probably useful to some people.  until that time there is
 not much point repeating the same assertions which are just going to
 aggravate people.

 Josh





 
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Re: [Flac-dev] Re: multiple core support

2007-09-09 Thread Harry Sack
2007/9/8, Scot Thompson [EMAIL PROTECTED]:

  No, streams should stay.  Audio is NOT a file based process -- it's a
 stream.  You can't listen to an entire song simultaneously.  You organize it
 into files for later use, but you listen and record from a stream.
 Stream-based storage is practically REQUIRED for an audio codec.  It's not
 random access, it's sequential.  You can put wrappers around it to make it
 convenient for file storage and conversions, but the codec itself must be
 streams.

 Multi-core support may not be practical for a variable-length encoding.
 How would you know where to write the next block when you don't know what
 size the first block is going to be?  The functionality for that is not
 trivial and is not currently implemented in the API.

 Maybe somebody will write a multi-core file-based wrapper for you, or
 maybe you could try writing one yourself.  Or if you disagree with Josh
 about the direction of FLAC you can write your own codec.  But your
 nattering on and on about how you think the API isn't right doesn't help at
 all and is very annoying.



I just say that the way it is now it's IMpossible to make multiple core
support, that's all. It's just a fact :)

Harry

--
 *From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On
 Behalf Of *Harry Sack
 *Sent:* Saturday, September 08, 2007 6:06 AM
 *To:* Brian Willoughby
 *Cc:* flac-dev@xiph.org
 *Subject:* Re: [Flac-dev] Re: multiple core support



 2007/9/8, Brian Willoughby [EMAIL PROTECTED]:
 
  Ralph,
 
  The problem is that there is no clear advantage, at least in terms of
  multiple cores, to the approach you're asking about.  In order to
  allow each stage of the codec to overlap, you need smart buffering
  between each stage.  That adds code and complexity which isn't there
  currently.  So you end up making the system do more work in the hopes
  that there will be some overlap.  Basically, later stages get blocked
  waiting for their input buffer to fill, which means that you're not
  really getting very much overlap at all, but plenty of multi-
  threading overhead.  At least that's the predicted result - I admit
  that nobody has tried this, to my knowledge.



 this is because of the limitations/design problem of FLAC API in
 particular. When the developers had made a smart decision and based
 everything on file based I/O you would get a HUGE performance boos when
 using multiple threads divided between multiple cores, because they only
 thing to do was to split the file output in different threads.
 But it's not clear to me why everything was based on streams...

 Harry

 Brian Willoughby
  Sound Consulting
 
 
  On Sep 7, 2007, at 18:25, Ralph Giles wrote:
 
  On Fri, Sep 07, 2007 at 04:59:50PM -0700, Josh Coalson wrote:
 
   it actually is complicated.  the libFLAC api is not suited to a
   multithreaded design because the i/o is stream-based, not file-
   based.  flac(.exe) is the file-based wrapper around libFLAC that
   allows it to work on files.  the way libFLAC buffers data is also
   impossible to parallelize without significantly changing the api.
 
  It seems like buffering (especially compressed) blocks and writing them
  to the stream in sequence wouldn't be a problem. Is there something in
  the way the blocking decisions are made that makes it hard to divide the
  input audio this way?
 
-r
 
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Re: [Flac-dev] Re: multiple core support

2007-09-08 Thread Harry Sack
2007/9/8, Josh Coalson [EMAIL PROTECTED]:

 it actually is complicated.  the libFLAC api is not suited to a
 multithreaded design because the i/o is stream-based, not file-
 based.  flac(.exe) is the file-based wrapper around libFLAC that
 allows it to work on files.  the way libFLAC buffers data is also
 impossible to parallelize without significantly changing the api.



why was this approach used? The API design seems to me not very smart
because it's not flexible and you're stuck in the future (like now for
multiple core support)
I don't see any reason why you wouldn't make it all based on files and not
on streams :s It's just a major disavantage in my opinion

it would take a specialty file-based encoder using an independent
 frame encoder to do and even that is not trivial.



so we can assume that those API changes will never come and the flac encoder
will never have multiple core support?

thx

--- Harry Sack [EMAIL PROTECTED] wrote:

  2007/9/7, Avuton Olrich [EMAIL PROTECTED]:
  
   On 9/6/07, Harry Sack [EMAIL PROTECTED] wrote:
it's really not complicated I think: only api changes to write on
  any
  
   Please get started writing a patch, immediately.
 
 
 
  I'm just an IT student and I have no time for that :)
  I also didn't study the flac API in detail but I know it's perfectly
  possible because I made a avi encoder running on multiple threads
  once and
  it's exactly the same for audio data.
 
  --
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   --
   Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
  
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Re: [Flac] FLAC: win installer

2007-09-07 Thread Harry Sack
2007/9/7, Josh Coalson [EMAIL PROTECTED]:



  - what windows versions are supported by the installer?

 I know it works at least back to nt4, not sure about earlier versions



so all 9x versions are supported because they were released after nt 4?

  

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[Flac-dev] Re: multiple core support

2007-09-06 Thread Harry Sack
it's really not complicated I think: only api changes to write on any
position in the file if that's not possible already with existing
function.

I'm not sure if decoding can have multi-core support: you need an api
for writing pcm files in different parts then and this is maybe more
difficult to check if it's valid pcm data since the decoder can only
check for valid flac streams , not pcm streams i think.

you can make recording also support multi cores: just let cpu 1 fill a
pcm data buffer while cpu 2 encodes it. In this case you have a more
reliable encoding with less cpu usage of your system (it's spread
among 2 cpu's)


2007/9/7, Brian Willoughby [EMAIL PROTECTED]:
 Hmm,

 You're actually correct, when you put it that way.  Because the audio
 blocks are coded independently, you could speed things by having the
 encoder (or decoder) do a little up-front processing on the metadata,
 then use the overall settings to divide the file into sections and
 run the FLAC process in parallel.  However, I think it is generally
 frowned upon in some circles to create one thread per processor,
 rather than making the division dependent upon some other factor that
 is actually independent of the number of processors.  Apart from that
 caveat, someone could certainly develop an encoder or decoder which
 uses the FLAC library API to implement a threaded encoder/decoder -
 well, assuming that the API can write to subsets of a file, instead
 of requiring that the entire file be written from start to finish -
 and also assuming that the API can run in multiple threads and write
 to the same file.

 By your method, decoding would be faster, too.  Not everybody decodes
 just to listen.  Some of us keep original masters in FLAC format for
 archival purposes, but need the whole thing decoded before we can mix
 and master.  Anything which speeds up decoding would help get work
 done faster.

 On the flip side, another thing to consider is that not all encoding
 is done with files that already exist.  If you are recording live to
 FLAC, you cannot multi-thread the encoder because you don't have any
 audio besides the current block.

 So, decoding for playback and encoding for recording are two examples
 which cannot be multi-threaded.  But file format conversion could be
 developed to take advantage of multiple processors.  It would require
 a lot of tweaks to the library, perhaps.

 Note: PC games are multi-threaded because they're already doing
 several different things at once.  Sometimes the complexity is
 actually reduced by dedicating a thread to each part of the game
 logic.  And precisely because there are so many different things
 going on, multi-threading can speed things up when they overlap in
 unpredictable ways.  Games would be harder to write in a single-
 threaded way.  Meanwhile, encoding/decoding FLAC is easier to write
 in a single-threaded design.

 Brian W.


 On Sep 6, 2007, at 16:42, Harry Sack wrote:

 yes, i totally agree but I'm talking about the ENcoder :)
 You can perfectly 'cut' the pcm stream 'in half' and let 1 cpu encode
 one part , the other 2nd part (or with 4 cpu's in 4 parts, ...),
 because it's just a stream one frame after the other,  as far as i
 know (correct me if i'm wrong).
 Many pc games synchronise multiple threads on 2 (even 4!) cores (much
 More complicated then reading frames, compressing, writing compressed
 frames like the encoder does), so i think making the encoder support 2
 cpu's is perfectly possible.

 of course adding multi-core support to the decoder is silly because
 it's not necessary (any single core cpu is fast enough to play 1 file
 and it would only slow it down)!

 2007/9/7, Brian Willoughby [EMAIL PROTECTED]:
  Any software which supports multiple processors must be multi-
  threaded.  The process of designing multi-threaded code adds
  complexity to the software, so there must be a good reason to go
  through all the trouble.  The procedure for decoding a single file
  could only benefit marginally from being multi-threaded, because most
  operations would need to wait until the previous operation was
  completed.  One section of the decoder might be able to process
  several blocks, but the overall result would still need to wait until
  all blocks are completed.  Besides, managing dynamic buffers between
  each step of the decoding process would actually require the decoder
  to do more, meaning it would slow down to an extent.  There would
  pretty much be no difference in the total time, whether single
  processor or multiple processors.
 
  The best way to take advantage of multiple processors is to decode
  multiple FLAC files at the same time.  This will take full advantage
  of your system, provided that the disk bandwidth and memory bandwidth
  can keep up.
 
  Brian W.


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[Flac] FLAC: compression

2007-09-05 Thread Harry Sack
hi list

Is it possible that a particular kind of music gives a smaller file
size with a lower compression then the best (level 8) compression or
is this not possible ?

thx
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[Flac] FLAC: win installer

2007-09-05 Thread Harry Sack
hi list

here some questions about the windows installer:

- can the installer be used on 64 bit windows versions and/or is there
a 64 bit version for the encoder/decoder?

- what windows versions are supported by the installer?

thx
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[Flac] FLAC: compressing data

2007-09-03 Thread Harry Sack
hi

can the flac encoder be used to compress non-wave data? So suppose I rename
a data file to *.wav, can i compress it then using the flac encoder to make
it smaller?
just wondering if this is possible
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[Flac-dev] FLAC: compression ratio

2007-08-27 Thread Harry Sack
hi flac-dev list!

I see, when compressing CD-audio tracks, I can reach up to 60% (ratio = 0.6x)
of the original WAV file after compression. I was wondering if the FLAC
codec could become as good as reaching 50% of the original WAV file in the
future or if we are already at the (almost) maximum compression possible?

thx
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[Flac] Re: FLAC: headphones

2007-08-27 Thread Harry Sack
Hi,

I forgot to say the headphone must have a 3.5mm stereo jack plug to attach
it the PDA.

thx in advance!

2007/8/27, Harry Sack [EMAIL PROTECTED]:

 hi flac list!

 I'm not sure if this question can be asked here, but here you go (it's a
 question for audiophiles only):

 I encode CDDA tracks to FLAC and play them on my Pocket PC (PDA). I'm
 looking for a high quality headphone to connect to my Pocket PC, but it must
 be an in-ear one but not like these:
 http://s7d1.scene7.com/is/image/vanns/770045336?$medium_item$
 So no plastic things must be inserted to the ears, it must be a flat
 surface to put in your ears like these ones:
 http://www.maplin.co.uk/images/Full/a22fn.jpg .

 So I'm looking for a brand and type of headphones that will give extreme
 good audio quality (possibly the best audio quality you can reach using
 in-ear headphones) for playing lossless music files.

 BTW: I'm not looking for these type of headphones (
 http://www.shopaxion.com/Headphone_Link/IR_headphone.jpg) only these kind
 ( http://www.maplin.co.uk/images/Full/a22fn.jpg), just to make this clear
 :)

 thx in advance

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[Flac-dev] FLAC: general question

2007-08-21 Thread Harry Sack
hi dev'ers

is it true flac is developed in linux by Josh and later compiled in windows?

I was also wondering if Josh implemented the flac encoder/decoder all
by himself ?

just some questions because I'm interested in flac in general :)

thx
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[Flac] concatenate

2007-08-17 Thread Harry Sack
hi

i have some small flac files and i want to concatenate to 1 big flac
file, but without using ogg flac. Is this possible and how do i do
this?

i also was wondering if there exists a way to let the flac encoder
remove audio frames of silence in the beginning and end of a wav input
file when encoding?

thx
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Re: [Flac] Re: FLAC: ERROR, MD5 signature mismatch

2007-07-26 Thread Harry Sack

2007/7/25, Josh Coalson [EMAIL PROTECTED]:


--- Harry Sack [EMAIL PROTECTED] wrote:
 2007/7/25, Harry Sack [EMAIL PROTECTED]:
 
  Hi
 
  I have downloaded a FLAC file somewhere and when trying to decode
 it to
  WAV it gives the error message: ERROR, MD5 signature mismatch
  So my question is now: are FLAC files that give the error message
 above
  still decodable to WAV (and how can you do this, because flac.exe
 doesn't
  want to decode the file), even if there is a MD5 signature
 mismatch, or is
  this not possible at all?

if that is the only error given even when decoded with -F, then
it got all the samples back.  they are also highly likely to be
the same samples that were encoded.  most likely they were encoded
on a machine with bad hardware (bad ram, aggressive overclocking),
less likely is that the file was corrupted or tampered with.





But how is it possible then the FLAC encoder allows files which have a bad
resulting MD5 to be encoded? Is it because of the bad ram, ... this
incorrect MD5 is not detected during encoding?

Can you also give me an example of an error message that would occur when
the file is corrupted?
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[Flac] Re: FLAC: ERROR, MD5 signature mismatch

2007-07-25 Thread Harry Sack

2007/7/25, Harry Sack [EMAIL PROTECTED]:


Hi

I have downloaded a FLAC file somewhere and when trying to decode it to
WAV it gives the error message: ERROR, MD5 signature mismatch
So my question is now: are FLAC files that give the error message above
still decodable to WAV (and how can you do this, because flac.exe doesn't
want to decode the file), even if there is a MD5 signature mismatch, or is
this not possible at all?




An additional question: what happens if you re-encode a FLAC file, that
gives the error message 'ERROR, MD5 signature mismatch' while trying to
decode to WAV, to another FLAC file using a later version of the FLAC
encoder? I tried this and it seems to work, but I'm wondering if the audio
data is still the same in the new file as in the old file?  Or what happens
in the re-encode process when such a input FLAC file is re-encoded to
another FLAC file?

thx in advance!

thx


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[Flac] FLAC: ERROR, MD5 signature mismatch

2007-07-25 Thread Harry Sack

Hi

I have downloaded a FLAC file somewhere and when trying to decode it to WAV
it gives the error message: ERROR, MD5 signature mismatch
So my question is now: are FLAC files that give the error message above
still decodable to WAV (and how can you do this, because flac.exe doesn't
want to decode the file), even if there is a MD5 signature mismatch, or is
this not possible at all?

thx
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[Flac] FLAC: tool to re-encode (win32)

2007-07-25 Thread Harry Sack

Hi

i'm looking for a tool (it must run in win32) to re-encode existing FLAC
files to a newer version of FLAC.
I tried the FLAC frontend (included in the FLAC 1.2.0 installer) but this
tool doesn't allow this (it only allows encoding of WAV files to FLAC files,
re-encoding of FLAC files to FLAC files isn't supported). So I'm looking for
a tool that can re-encode existing FLAC files without having manually to
decode them to WAV.
I tried to do this in the windows command prompt several times but there are
too many problems with that windows prompt (no wildcard support if you use
flac.exe, ...) so I prefer a graphical tool.

I hope maybe somebody can help me

thanks in advance
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[Flac] Re: FLAC: ERROR, MD5 signature mismatch

2007-07-25 Thread Harry Sack

2007/7/25, Harry Sack [EMAIL PROTECTED]:




2007/7/25, Harry Sack [EMAIL PROTECTED]:

 Hi

 I have downloaded a FLAC file somewhere and when trying to decode it to
 WAV it gives the error message: ERROR, MD5 signature mismatch
 So my question is now: are FLAC files that give the error message above
 still decodable to WAV (and how can you do this, because flac.exedoesn't want 
to decode the file), even if there is a MD5 signature mismatch,
 or is this not possible at all?



An additional question: what happens if you re-encode a FLAC file, that
gives the error message 'ERROR, MD5 signature mismatch' while trying to
decode to WAV, to another FLAC file using a later version of the FLAC
encoder? I tried this and it seems to work, but I'm wondering if the audio
data is still the same in the new file as in the old file?  Or what happens
in the re-encode process when such a input FLAC file is re-encoded to
another FLAC file?




Here is the metaflac --list of the input and output FLAC file, the input
file is the file that gives the 'ERROR, MD5 signature mismatch' error when
decoding to WAV. The output file is the newly re-encoded FLAC file when
using the input file as an input to the FLAC encoder:

metaflac --list input_file.flac
METADATA block #0
 type: 0 (STREAMINFO)
 is last: false
 length: 34
 minimum blocksize: 1152 samples
 maximum blocksize: 1152 samples
 minimum framesize: 0 bytes
 maximum framesize: 4768 bytes
 sample_rate: 44100 Hz
 channels: 2
 bits-per-sample: 16
 total samples: 20527080
 MD5 signature: 5f00690064003d005000200020002000
METADATA block #1
 type: 4 (VORBIS_COMMENT)
 is last: false
 length: 287
 vendor string: Flake SVN
 comments: 11
   comment[0]: TITLE=Dido (Armin Van Buuren's Universal Religion Mix)
   comment[1]: ARTIST=Aria
   comment[2]: ALBUM ARTIST=DJ Tiësto
   comment[3]: ALBUM=Summerbreeze
   comment[4]: GENRE=General Trance
   comment[5]: DATE=2000
   comment[6]: DISCNUMBER=1/1
   comment[7]: PUBLISHER=Nettwerk
   comment[8]: COMMENT=Ripped by Winamp
   comment[9]: TRACKNUMBER=1
   comment[10]: ENCODED-BY=Winamp 5.34
METADATA block #2
 type: 1 (PADDING)
 is last: true
 length: 3826




**

metaflac --list output_file.flac
METADATA block #0
 type: 0 (STREAMINFO)
 is last: false
 length: 34
 minimum blocksize: 4096 samples
 maximum blocksize: 4096 samples
 minimum framesize: 14 bytes
 maximum framesize: 14043 bytes
 sample_rate: 44100 Hz
 channels: 2
 bits-per-sample: 16
 total samples: 20527080
 MD5 signature: 4478d07a5f9acaae35cdef1f1753c764
METADATA block #1
 type: 3 (SEEKTABLE)
 is last: false
 length: 846
 seek points: 47
   point 0: sample_number=0, stream_offset=0, frame_samples=4096
   point 1: sample_number=438272, stream_offset=1010333, frame_samples=4096
   point 2: sample_number=880640, stream_offset=2027118, frame_samples=4096
   point 3: sample_number=1318912, stream_offset=3048483,
frame_samples=4096
   point 4: sample_number=1761280, stream_offset=4067062,
frame_samples=4096
   point 5: sample_number=2203648, stream_offset=5063693,
frame_samples=4096
   point 6: sample_number=2641920, stream_offset=6081493,
frame_samples=4096
   point 7: sample_number=3084288, stream_offset=7139986,
frame_samples=4096
   point 8: sample_number=3526656, stream_offset=8223226,
frame_samples=4096
   point 9: sample_number=3964928, stream_offset=9324016,
frame_samples=4096
   point 10: sample_number=4407296, stream_offset=10366547,
frame_samples=4096
   point 11: sample_number=4849664, stream_offset=11436008,
frame_samples=4096
   point 12: sample_number=5287936, stream_offset=12491977,
frame_samples=4096
   point 13: sample_number=5730304, stream_offset=13715044,
frame_samples=4096
   point 14: sample_number=6172672, stream_offset=14963345,
frame_samples=4096
   point 15: sample_number=6610944, stream_offset=16294043,
frame_samples=4096
   point 16: sample_number=7053312, stream_offset=17663068,
frame_samples=4096
   point 17: sample_number=7495680, stream_offset=19027520,
frame_samples=4096
   point 18: sample_number=7933952, stream_offset=20380473,
frame_samples=4096
   point 19: sample_number=8376320, stream_offset=21739699,
frame_samples=4096
   point 20: sample_number=8818688, stream_offset=23101828,
frame_samples=4096
   point 21: sample_number=9256960, stream_offset=24461617,
frame_samples=4096
   point 22: sample_number=9699328, stream_offset=25856237,
frame_samples=4096
   point 23: sample_number=10141696, stream_offset=27254435,
frame_samples=4096
   point 24: sample_number=10579968, stream_offset=28648219,
frame_samples=4096
   point 25: sample_number=11022336, stream_offset=30041445,
frame_samples=4096
   point 26: sample_number=11464704, stream_offset=31425625,
frame_samples=4096
   point 27: sample_number=11902976, stream_offset=32813313,
frame_samples=4096
   point 28: sample_number=12345344, stream_offset=34237869,
frame_samples=4096
   point 29: sample_number=12787712

[Flac] FLAC: FLAC frontend

2007-07-25 Thread Harry Sack

hi,

Does anybody know where the official website of the FLAC frontend (for
windows) is?
If you look here http://members.home.nl/w.speek/ you can see the FLAC
frontend is not longer maintained by Speek but in the FLAC installer there
is still and update to the frontend (version 1.7.1 vs. version 1.7 on
Speek's website).
So I was wondering where the official site for the FLAC frontend is located
now.

thx in advance
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[Flac] Re: FLAC: re-encoding

2007-07-25 Thread Harry Sack

2007/7/25, Harry Sack [EMAIL PROTECTED]:


hi

I have some questions about re-encoding existing FLAC files to FLAC 1.2.0
.:

- can older 1.1.x FLAC files be re-encoded to FLAC 1.2.0 by using the FLAC
1.2.0 encoder?

- can FLAC files encoded with the FLAC Flake SVN encoder (or any other
'unofficial' FLAC encoder) be re-encoded by using the FLAC 1.2.0 encoder?




To be a bit more clear: I mean of course re-encoding the FLAC files without
decoding them to WAV files manually, so by letting the FLAC encoder do all
the work.

thx

thx in advance!



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Re: [Flac] FLAC: editing software

2007-07-24 Thread Harry Sack

2007/7/23, Greg M. [EMAIL PROTECTED]:


I just tried this with Goldwave.. it decoded the file,
i edited out some stuff, and saved the file (flac
format) and the tags appear to be intact.




thanks a lot, it seems to work with Goldwave. Exactly what I was looking
for!

thx

Greg M.


--- Tomas Valusek [EMAIL PROTECTED] wrote:

 Hello,

 and what if I want to preserve FLAC tags while I'm
 editing its contents?
 Is there a way e.g. to cut silent block from FLAC
 and preserve tags? By
 uncompressing to WAV, I lose all tag info.

 Tomas Valusek

 Greg M. napsal(a):
  Hairy,
 
  I've used Goldwave (goldwave.com) (trialware) for
  awhile now for editing WAVs. It will take care of
  de-compressing from FLAC, but I don't know what
  happens when you save back as a FLAC, I haven't
 tried
  that.
 
  If you are really wanting to edit the FLAC file, I
  don't think it makes sense to do this without
  converting to WAV. It's like editing a ZIP file of
  Microsoft Word documents without decompressing to
 Word
  format.
 
  Good luck.
 
  --- Harry Sack [EMAIL PROTECTED] wrote:
 
 
  yes I know I can do that, but my question is if
  there is software to edit
  FLAC files without having to uncompress to
  WAV/recompress to FLAC.
 
 
 
  2007/7/23, Avuton Olrich [EMAIL PROTECTED]:
 
  On 7/23/07, Harry Sack [EMAIL PROTECTED]
 
  wrote:
 
  hi
 
  does somebody know software for editing FLAC
 
  files? So I just want to
 
  cut
 
  some pieces out of the file (for example
 silence
 
  in front of a
 
  recording)
 
  Uncompress the file, run wavbreaker on it, use
 
  wavmerge as necessary,
 
  recompress.
  --
  avuton
  --
  Anyone who quotes me in their sig is an idiot.
 --
 
  Rusty Russell.
 
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[Flac] FLAC: general question

2007-07-24 Thread Harry Sack

hi FLAC list!

I have a general question about the FLAC decoder. Is it true the FLAC
decoder requires less CPU power then a MP3 decoder? And if yes, is there
somebody who can give me a comparison e.g. FLAC decoder uses 50% less CPU
power then a MP3 decoder or is this difference only minimal?

thx
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Re: [Flac] FLAC: editing software

2007-07-23 Thread Harry Sack

yes I know I can do that, but my question is if there is software to edit
FLAC files without having to uncompress to WAV/recompress to FLAC.



2007/7/23, Avuton Olrich [EMAIL PROTECTED]:


On 7/23/07, Harry Sack [EMAIL PROTECTED] wrote:
 hi

 does somebody know software for editing FLAC files? So I just want to
cut
 some pieces out of the file (for example silence in front of a
recording)

Uncompress the file, run wavbreaker on it, use wavmerge as necessary,
recompress.
--
avuton
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.

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[Flac] FLAC: compressing more with traditional compression algorithm

2007-07-11 Thread Harry Sack

Hi,

I was wondering if it's possible to compress encoded FLAC files even more
using a traditional compression algorithm like zip, rar, ... or won't you
get any smaller files using such an algorithm by applying it on the encoded
FLAC files?

thx
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Re: [Flac] FLAC: getting compression level using metaflac

2007-07-05 Thread Harry Sack

Why isn't the compression level added in a metadata block by the flac
encoder itself (just like the encoder version)? In this way all programs
that read the file can see what compression level was used.

thx

2007/7/4, Scot Thompson [EMAIL PROTECTED]:


 This has been asked many times.  The answer is no.  I suggest saving the
compression level into a tag for future reference, but that won't help you
with files you get from unknown locations.

 --
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On Behalf Of
*Harry Sack
*Sent:* Wednesday, July 04, 2007 7:14 AM
*To:* flac@xiph.org
*Subject:* [Flac] FLAC: getting compression level using metaflac

Hi FLAC list!

I have a question (maybe a strange one) about getting the compression
level (0-8) using metaflac.
So I want to know for a given FLAC file what compression level was used to
compress that file.
I tried using the --list option but this doesn't give any information
about this.

Is there a way to get the compression level of a given FLAC file using
metaflac or another tool?

thx

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Re: [Flac] including images

2007-07-04 Thread Harry Sack

2007/7/3, Ralph Giles [EMAIL PROTECTED]:


On Tue, Jul 03, 2007 at 07:18:17PM +0200, Harry Sack wrote:

 Can anybody tell me what the maximum filesize is for an image file to be
 included in a FLAC file? I'm just exploring this feature and I didn't
find
 this yet

The metadata block length field is 24 bits, so the upper limit is just a
little less than 16 MB. At least in theory, I didn't test that.




can Josh maybe confirm this? I'm planning to include some BMP images of
album art in my FLAC files and those files can become big very quickly. So I
hope somebody can tell me the upper limit for images, so I don't have
problems with it when I exceed a certain filesize (without 'guessing' this
limit). Thanks in advance


PS: Does anybody know why there are so little programs that actually
support
 the viewing of embedded pictures? I only found 2 of them: Amarok in
linux
 and foobar in windows.

There's not really a standard (or rather there are several) for album
art, and it still seems to be an advanced feature. Feel free to agitate,
this is an area where the better metadata of the free formats is a real
advantage.

-r

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[Flac] FLAC: getting compression level using metaflac

2007-07-04 Thread Harry Sack

Hi FLAC list!

I have a question (maybe a strange one) about getting the compression level
(0-8) using metaflac.
So I want to know for a given FLAC file what compression level was used to
compress that file.
I tried using the --list option but this doesn't give any information about
this.

Is there a way to get the compression level of a given FLAC file using
metaflac or another tool?

thx
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[Flac] including images

2007-07-03 Thread Harry Sack

hi,

Can anybody tell me what the maximum filesize is for an image file to be
included in a FLAC file? I'm just exploring this feature and I didn't find
this yet

PS: Does anybody know why there are so little programs that actually support
the viewing of embedded pictures? I only found 2 of them: Amarok in linux
and foobar in windows.

thx in advance!
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Re: [Flac-dev] FLAC: library for C#

2007-06-14 Thread Harry Sack

2007/6/14, Josh Coalson [EMAIL PROTECTED]:


--- Erik de Castro Lopo [EMAIL PROTECTED] wrote:
 Harry Sack wrote:

  Hi FLAC dev's list,
 
  I'm looking for a library for the C# language (Microsoft .Net
  Framework 2.0or higher) to play FLAC files and/or maybe do some
 other
  things like getting
  the file duration, file properties, ... of FLAC files.
  The library must preferably be free (open source is not required,
 but is
  always nice).

 Why not just build FLAC as a DLL and then call into the DLL from C#?

Harry, if that is good enough, there are already pre-build DLLs
with headers in the sourceforge download section.




but aren't they C++ headers en lib's? I have no idea how I can include a C++
header in a C# project.
It this even possible?

thx

Josh







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[Flac-dev] FLAC: library for C#

2007-06-13 Thread Harry Sack

Hi FLAC dev's list,

I'm looking for a library for the C# language (Microsoft .Net
Framework 2.0or higher) to play FLAC files and/or maybe do some other
things like getting
the file duration, file properties, ... of FLAC files.
The library must preferably be free (open source is not required, but is
always nice).
I hope somebody can help me with this!

thx
Harry
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Re: [Flac-dev] compression ratio

2007-05-15 Thread Harry Sack

2007/5/14, Josh Coalson [EMAIL PROTECTED]:


--- Harry Sack [EMAIL PROTECTED] wrote:
 hi

 i was wondering if it's possible to tell me what the theoretical best
 compression ratio the flac encoder can do, because i was wondering
 what the future of flac will bring us. So this question is probably
 best addressed to Josh: can we suspect much better compression ratio
 in the future or is the encoder already at his *almost* peak
 compression level.

I think you're talking about average compression ratio because it
depends on the particular sample.  to make significant improvements
(3%) would require changes to the format that wouldn't work with
older decoders, which I don't plan on ever doing.




i think that's a very good decision!

if you look at the comparison here:

  http://flac.sourceforge.net/comparison.html
you will see that FLAC is already within 3-4% of the most aggresive
codecs.




so in the future we can expect mostly speed improvements for
encoder/decoder?

Thanks

Josh





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[Flac-dev] compression ratio

2007-05-12 Thread Harry Sack

hi

i was wondering if it's possible to tell me what the theoretical best
compression ratio the flac encoder can do, because i was wondering
what the future of flac will bring us. So this question is probably
best addressed to Josh: can we suspect much better compression ratio
in the future or is the encoder already at his *almost* peak
compression level.

thx in advance!
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[Flac] encoding 22 kHz

2007-05-12 Thread Harry Sack

hi,

is it possible to encode 16 bit, 22 kHz, stereo/mono WAV files to FLAC files
or could there be a problem with the low frequency 22 kHz (lower then CD
quality)?

PS: I'm a FLAC beginner

thx
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Re: [Flac] FLAC: sending output to file

2007-04-18 Thread Harry Sack

2007/4/18, Josh Coalson [EMAIL PROTECTED]:


--- Harry Sack [EMAIL PROTECTED] wrote:
 Hi,

 I'm using windows so I know the wildcard support for flac is broken.
 That's
 why I use this command to encode a whole directory of WAV-files to
 FLAC-files in a command prompt:

 for %1 in (*.wav) do flac -V --best %1

 This command is fully working

 Now I want to write the flac output to a file, so I can open this
 file
 later.
 I tried to add  outputfile.txt to the command like this:

 for %1 in (*.wav) do flac -V --best %1  outputfile.txt

 But this doesn't work.

using  only captures stdout, but flac messages go to stderr, so
you need to do

for %1 in (*.wav) do flac -V --best %1 2 outputfile.txt

this is true for cmd.exe as well as other unixy shells like bash.
not sure if it works for command.com though.




thanks a lot, it works! I was also wondering if writing everything to a file
can slow down the FLAC encoding or is it as fast as writing everything to a
command window?
I was wondering if you know where I can find more information about the '2'
operator for the windows command line? I don't find anything about it (I
usually don't use the command line). Where did you find information about
it?

thx in advance!

Josh



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[Flac] FLAC: re-encode

2007-04-09 Thread Harry Sack

hi,

is it possible to re-encode an existing FLAC file by using the FLAC
file itself as input to the encoder like this: flac -V --best
inputfile.flac OR do you have decode it to WAV first?

thx
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[Flac] FLAC: data integrity checks

2007-04-09 Thread Harry Sack

hi,

are there some data integrity checks I can do on a downloaded FLAC
file? If yes, can you give me the command line options/other software
I need for this? I want to do some tests on downloaded files to check
if they are corrupted after downloading

thx
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[Flac] FLAC: data integrity checks

2007-04-09 Thread Harry Sack

hi,

are there some data integrity checks I can do on a downloaded FLAC
file? If yes, can you give me the command line options/other software
I need for this? I want to do some tests on downloaded files to check
if they are corrupted after downloading

thx
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[Flac] FLAC: data integrity checks

2007-04-09 Thread Harry Sack

hi,

are there some data integrity checks I can do on a downloaded FLAC
file? If yes, can you give me the command line options/other software
I need for this? I want to do some tests on downloaded files to check
if they are corrupted after downloading

thx
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Re: [Flac] FLAC: track and album gain?

2007-04-02 Thread Harry Sack

2007/4/1, Ivo Emanuel Gonçalves [EMAIL PROTECTED]:


Those are Replay Gain elements.  Please check on Wikipedia or
Hydrogenaudio for more information on RG.  In short, they are values
to normalize in a lossless way the audio volume.




Hi,

But how can this be possibly lossless? You change the volume of the audio
tracks, so isn't this lossy or does the actual volume of a track isn't
considered as audio quality?

thanks in advance
PS: I'm a beginner, so it could be a stupid question!


-Ivo

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Re: [Flac] FLAC: FLAC T-shirt

2007-04-01 Thread Harry Sack

Hi,

Is there anybody who knows where +I can find a picture on the Internet about
the FLAC t-shirt?
I wanted to make one myself just for personal use and I would like to see
how the original looked.

thanks in advance!

2007/3/29, Mark Rudholm [EMAIL PROTECTED]:


Harry Sack wrote:
 Hi,

 I found some messages on the Internet there was a FLAC T-shirt. Is this
 T-shirt still available, because I'm really interested.
 If it is, where can it be ordered?

(Josh will probably answer this question)

I have a FLAC t-shirt, now I want a FLAC Jacket  :-)

-Mark

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[Flac] FLAC: recommended compression

2007-04-01 Thread Harry Sack

Hi,

Why is -5 the recommended compression for the FLAC encoder? So my question
is: why is a lower compression recommended over a higher compression (-8)?
What factors make -5 the recommended one, even if the compression is lower
then the -8 option?

I hope somebody can explain this

thanks in advance!
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[Flac] FLAC: 99% complete message?

2007-04-01 Thread Harry Sack

Hi,

I tried to encode a WAV file to FLAC. But then I get a strange message: 99%
complete. You can see the details below:


12 - In My Eyes (Radio Edit).wav: 99% complete, ratio=0,67412 - In My Eyes
(Radi
o Edit).wav: WARNING: skipping unknown sub-chunk 'LIST'
12 - In My Eyes (Radio Edit).wav: Verify OK, wrote 25090527 bytes,
ratio=0,670

I have encoded the file using 'flac -V --best' using the flac command line
tool.

Can somebody explain me please what the 99% complete message means? Does
this mean there were errors or what is the meaning of it? I can see the
'Verify OK' message but still flac tells me it's 99% complete. I don't
understand what's happening here ...

thanks in advance!
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[Flac] FLAC: decoding to WAV in the future

2007-04-01 Thread Harry Sack

Hi,

I'm a FLAC beginner and I had a question. Suppose I encode my whole CD
collection now in the FLAC format, using the FLAC encoder version 1.1.4 (the
most recent one at this time).
Will I still be able to decode all FLAC files to WAV files in the future
using the latest FLAC decoder, when for example version 2.0 of FLAC (or a
later version) is released or is it possible that at some point in the
future you can't decode older FLAC files anymore with the latest FLAC
decoder?

So basically my question is: can you always decode ANY FLAC file, no mather
what FLAC encoder version you have used to encode it, by using ANY other
newer FLAC decoder that still has to be released in the future?

I was hoping the main developer Josh Coalson could confirm this, because
it's an important point for people who like to store their CD collection in
the FLAC format!

thanks in advance!
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[Flac] FLAC: getting FLAC encoder version

2007-03-31 Thread Harry Sack

Hi,

I want to encode my CD collection using the FLAC encoder. I was wondering if
you can see the FLAC encoder version number (e.g. 1.1.4.) in the encoded
files in some way.
Does the encoder store the FLAC encoder version number in the encoded files
somewhere? I could store this version number in the comment tag myself when
I encode the files, but I was wondering if it's stored automatically
somewhere in the flac file.
I ask this because I later want to check my files for the version number and
if there is a new FLAC encoder I can re-encode the files with a version
number smaller then the version number of the new updated encoder.

thanks in advance!
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[Flac] FLAC: FLAC T-shirt

2007-03-29 Thread Harry Sack

Hi,

I found some messages on the Internet there was a FLAC T-shirt. Is this
T-shirt still available, because I'm really interested.
If it is, where can it be ordered?

thanks in advance!
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[Flac] FLAC: specifying all files with extension .WAV

2007-03-22 Thread Harry Sack

Hi,

I want to use the flac encoder (in commandline mode) and I specify this
command to encode all .WAV files in the current directory:

N:\WAVflac -V --best -- *.wav

flac 1.1.4, Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh
Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for
details.

ERROR: can't open input file *.wav: Invalid argument

What is wrong in my syntax or how can I specify to encode all *.wav files in
the current directory (I'm using windows)?
I remember that typing 'flac --best *wav' DID work in linux, why doesn't it
work in windows?

thanks
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