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A multicore FLAC encoder
GeorgeFP
post Nov 15 2009, 19:38
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Member No.: 71959



Hi!

Maybe you already know fpMP3Enc, my multicore MP3 encoder...

This time, I'd like to introduce my multicore FLAC encoder. You can download the binaries here.

The package contains Win32 binaries for XP, Vista and 7, and Win64 binaries for Vista and 7.

The FLAC encoder is part of my "fpStream" project. The command-line to convert a WAV file to FLAC is as follows:

CODE
FPSTREAM.EXE readfile in -f <wav-filename> + wavin wav -s in + fpflacenc enc -s wav [-<compression level>] + writefile out -s enc -f <flac-filename>


The benchmarks so far:
I used the same test suite as in fpMP3Enc (Intel Q9450, 61 WAV files, about 5 hours playing time). The compression level was 5. The files were encoded one after the other, not in parallel.

- flac 1.2.1: 3 min 26 secs
- fpFLAC x64: 1 min 13 secs

So, the speedup was 2.8x. This is quite good if you consider that this version does not contain any SSE optimizations.

What's missing:
- SSE optimizations
- Metadata support (tags, seek points etc.)
- free of bugs

And some limitations:
- Win32 version: The total WAV file size sum must not exceed 400MiB(? - not sure).
- Win64 version: The total WAV file size sum must not exceed 400GiB.
- Input: WAV 16-bit stereo, 44.1kHz

Comments and feedback are welcome!
George
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Chinch
post Dec 2 2009, 07:23
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Member No.: 71664



Alright! I'm impressed. I have to say that I didn't think the improvement would be that great on my system, but here are my results (based on about a 53 minute CD):

original FLAC encoder (-8) = 1 minute, 15 seconds. mellow.gif
and George FP's encoder (-8) = 24 seconds! shock1.gif

i didn't believe it, so I did a bit-compare on the two files:

CODE
All tracks decoded fine, no differences found.
    
    Comparing:
    "X:\encode1.flac"
    "X:\encode2.flac"
    No differences in decoded data found.


and then I did a verify on the FLAC files, to make sure they were identical (audio data-wise):

CODE
Item: "X:\encode1.flac"
    MD5: 66B84449D7A9899065A11FA190C994AC
    CRC32: D199E9A2
    No problems found.
    
    All items decoded successfully.
    
    
    Item: "X:\encode2.flac"
    MD5: 66B84449D7A9899065A11FA190C994AC
    CRC32: D199E9A2
    No problems found.
    
    All items decoded successfully.



finally, to prove that it wasn't EXACTLY THE SAME THING, i have noted the file sizes and hashes of both FLAC files... different! both files are unique.

CODE
File: encode1.flac
    Size: 357MB (374,398,783 bytes)
    CRC-32: fa984f9e
       MD5: 6eb400219c22f1aa1525d13f5f7f1135
     SHA-1: 70aa7e4a65ed635eb78b52ef3d2f1b1b8b435692
    
    File: encode2.flac
    Size: 356MB (374,328,806 bytes)
    CRC-32: eac29087
       MD5: a8d830f2defbe50af368ce60a5a69460
     SHA-1: c356080e0e508d26b8d7b625229af0d2ca2dde7b


so George... you have made a believer of me! empirical evidence, right there for me and everyone else to see.... congrats!
I am about to do a second test on a second system, then I will post those results below.

Results from test #2:

original FLAC encoder (-8 compression) = 1 minute, 07 seconds
and George FP's encoder (-8 compression) = 21 seconds

just for kicks I tried flaCUDA...

flaCUDA encoder (-11 compression) = 58 seconds
flaCUDA encoder (-8 compression) = 16 seconds

CODE
E:\Temp>CUETools.FlaCuda.exe -11 encode.wav -o encode3.flac
      CUETools.FlaCuda, Copyright (C) 2009 Gregory S. Chudov.
    Filename  : encode.wav
      File Info : 44100kHz; 2 channel; 16 bit; 00:52:53.4930000
      Results   : 53.89x; 373021162 bytes in 00:00:58.8901034 seconds;
      
      E:\Temp>CUETools.FlaCuda.exe -8 encode.wav -o encode4.flac
      CUETools.FlaCuda, Copyright (C) 2009 Gregory S. Chudov.
      Filename  : encode.wav
      File Info : 44100kHz; 2 channel; 16 bit; 00:52:53.4930000
      Results   : 198.27x; 373969399 bytes in 00:00:16.0056281 seconds;


but there is a discrepancy.... flaCUDA's compression scheme goes up to 11, and that is what the 58 second result was based on... when I use compression -8, the encoding time ends up only taking 16 seconds. jeez. I'm not sure how the compression numbers crossover though. all 4 output files are identical to the original and each other (same audio MD5's), the two files produced by FLAC and fpFLAC both have a bitrate of 944, whereas the flaCUDA -11 encode shows a 940 bitrate, and the flaCUDA -8 encode shows a 943 bitrate (in foobar2000) -- all end-product FLAC files are sized between 355MB and 357MB, so negligible difference, size wise. *shrug* i have no idea.... already put waaaay too much thought into this as it is haha wink.gif

anyways, with differing compression schemes, it's hard to make a solid conclusion.... other than that both of these two are VERY FAST encoders!

oh yeah, and of course, I forgot to include what specs I was using to test:

Intel i7-860 (2.8Ghz stock, 3.47Ghz in turbo mode -- it's a Quad-core with Hyper-Threading, so it sees it as 8 CPU's)
4GB DDR3-1600 RAM
Windows7 x64... I used of course the 64 bit version and the SSE4 instructions as George said in the readme
(and video card is Nvidia GeForce 9600 GSO)



This post has been edited by Chinch: Dec 2 2009, 08:18
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Posts in this topic
- GeorgeFP   A multicore FLAC encoder   Nov 15 2009, 19:38
- - Cokemonkey11   Good stuff, can't wait for the GUI.   Nov 15 2009, 21:49
- - punkrockdude   Yeah! I love that your make multi core applica...   Nov 15 2009, 23:03
- - flacflac   Wow, this is very interesting. The speed-gain you...   Nov 16 2009, 11:14
|- - GeorgeFP   QUOTE (flacflac @ Nov 16 2009, 11:14) Wow...   Nov 16 2009, 13:34
- - Maurits   Is there any chance that these improvements can be...   Nov 16 2009, 12:39
|- - GeorgeFP   QUOTE (Maurits @ Nov 16 2009, 12:39) Is t...   Nov 16 2009, 13:56
- - hlloyge   It would be interesting to compare it to CUDA FLAC...   Nov 16 2009, 12:55
|- - GeorgeFP   QUOTE (hlloyge @ Nov 16 2009, 12:55) It w...   Nov 16 2009, 20:51
- - Lucho   QUOTE (GeorgeFP @ Nov 15 2009, 20:38) COD...   Nov 16 2009, 16:12
|- - GeorgeFP   QUOTE (Lucho @ Nov 16 2009, 16:12) This i...   Nov 16 2009, 17:33
- - GeorgeFP   OK, I've uploaded a new version. The link is t...   Nov 16 2009, 18:25
- - flacflac   Hi GeorgeFP, thank you for this exciting multicor...   Nov 17 2009, 18:58
|- - GeorgeFP   Thanks for your feedback! QUOTE 1) Using Win7...   Nov 17 2009, 22:21
|- - flacflac   Hi George, thank you for that detailed reply! ...   Nov 18 2009, 03:10
||- - GeorgeFP   QUOTE (flacflac @ Nov 18 2009, 03:10) Awe...   Nov 18 2009, 07:05
|- - Cokemonkey11   QUOTE (GeorgeFP @ Nov 17 2009, 13:21) Yes...   Nov 18 2009, 03:58
|- - GeorgeFP   QUOTE (Cokemonkey11 @ Nov 18 2009, 03:58)...   Nov 18 2009, 06:59
|- - Cokemonkey11   QUOTE (GeorgeFP @ Nov 17 2009, 21:59) QUO...   Nov 18 2009, 07:09
|- - GeorgeFP   QUOTE (Cokemonkey11 @ Nov 18 2009, 07:09)...   Nov 18 2009, 13:25
- - GeorgeFP   I have uploaded a new version. The release notes ...   Nov 18 2009, 19:52
|- - flacflac   QUOTE (GeorgeFP @ Nov 18 2009, 13:52) I h...   Nov 19 2009, 09:17
|- - GeorgeFP   QUOTE (flacflac @ Nov 19 2009, 09:17) 1) ...   Nov 19 2009, 10:10
- - GeorgeFP   Here is a screenshot how to configure EAC to use f...   Nov 23 2009, 10:34
|- - howesz   For ease of integration with EAC (i.e. so you can ...   Dec 2 2009, 03:14
||- - GeorgeFP   QUOTE (howesz @ Dec 2 2009, 03:14) How ha...   Dec 4 2009, 21:37
|- - jamesbaud   QUOTE (GeorgeFP @ Nov 23 2009, 01:34) Her...   Dec 2 2009, 11:00
|- - JacksonGrey   QUOTE (jamesbaud @ Dec 2 2009, 10:00) Cou...   Dec 2 2009, 13:40
|- - GeorgeFP   QUOTE (jamesbaud @ Dec 2 2009, 11:00) Cou...   Dec 3 2009, 09:50
|- - gottkaiser   Wow, I'm impressed. Thanks for all the work ef...   Dec 3 2009, 12:26
- - Wombat   You may use it together with metaflac with linking...   Dec 2 2009, 03:36
- - Chinch   interesting project you have going here. i know th...   Dec 2 2009, 06:25
|- - GeorgeFP   QUOTE (Chinch @ Dec 2 2009, 06:25) 1) the...   Dec 4 2009, 22:02
- - Chinch   Alright! I'm impressed. I have to say that...   Dec 2 2009, 07:23
- - Glenda   Such a nice upgrade to EAC, thankyou   Dec 3 2009, 14:14
|- - Glenda   QUOTE (Glenda @ Dec 3 2009, 09:14) Such a...   Dec 3 2009, 14:22
- - Glenda   QUOTE (Glenda @ Dec 3 2009, 09:22) QUOTE ...   Dec 3 2009, 14:36
- - GeorgeFP   Hi! The new version can be downloaded here: ...   Dec 4 2009, 12:27
|- - gottkaiser   QUOTE (GeorgeFP @ Dec 4 2009, 12:27) To u...   Dec 4 2009, 13:08
||- - jamesbaud   QUOTE (gottkaiser @ Dec 4 2009, 04:08) QU...   Dec 5 2009, 14:32
|- - johnsonlam   QUOTE (GeorgeFP @ Dec 4 2009, 19:27) 64-B...   Dec 4 2009, 13:25
|- - GeorgeFP   QUOTE (johnsonlam @ Dec 4 2009, 13:25) QU...   Dec 4 2009, 14:03
- - GeorgeFP   And here is the screenshot for foobar2000: You s...   Dec 4 2009, 12:47
- - greynol   Considering that EAC only passes one file at a tim...   Dec 4 2009, 18:12
|- - Gregory S. Chudov   This encoder is useful, because it can use all the...   Dec 4 2009, 20:04
|- - GeorgeFP   QUOTE (greynol @ Dec 4 2009, 18:12) Consi...   Dec 4 2009, 22:21
- - pdq   So are you saying that it is pointless to use this...   Dec 4 2009, 19:51
- - greynol   I know I'm usually a sarcastic cynic, but this...   Dec 4 2009, 19:57
- - greynol   So it's a departure from this? http://www.hydr...   Dec 4 2009, 20:10
- - pdq   Wouldn't the time to compress a single image f...   Dec 4 2009, 20:20
- - greynol   EAC doesn't start encoding with an external co...   Dec 4 2009, 20:36
- - pdq   I'm just saying that the time to encode after ...   Dec 4 2009, 21:25
- - greynol   On my system it still takes longer to encode @ -8 ...   Dec 4 2009, 21:29
- - greynol   Perhaps you could have made it a little more clear...   Dec 4 2009, 22:29
|- - GeorgeFP   QUOTE (greynol @ Dec 4 2009, 22:29) Perha...   Dec 4 2009, 22:43
- - greynol   Well no. Why didn't you provide that link in ...   Dec 4 2009, 22:50
- - GeorgeFP   A new version with two bug fixes is available for ...   Dec 7 2009, 19:55
- - JacksonGrey   I keep getting an error that a number of files ...   Dec 8 2009, 00:59
|- - GeorgeFP   QUOTE (JacksonGrey @ Dec 8 2009, 00:59) I...   Dec 8 2009, 07:14
- - GeorgeFP   I've found the problem with the installer: Sev...   Dec 8 2009, 13:12
- - greynol   I'd love to see this done with metaflac so tha...   Dec 8 2009, 17:34
- - NuSkooler   I cannot wait for this to be ready for production ...   Dec 23 2009, 18:16
|- - GeorgeFP   QUOTE (NuSkooler @ Dec 23 2009, 18:16) I ...   Dec 24 2009, 12:47
|- - Bylie   QUOTE (GeorgeFP @ Dec 24 2009, 12:47) Wel...   Dec 24 2009, 14:59
||- - GeorgeFP   QUOTE (Bylie @ Dec 24 2009, 14:59) But, p...   Dec 25 2009, 13:33
||- - Bylie   QUOTE (GeorgeFP @ Dec 25 2009, 13:33) Bel...   Dec 25 2009, 18:43
||- - GeorgeFP   QUOTE (Bylie @ Dec 25 2009, 18:43) I real...   Dec 25 2009, 22:11
|- - _mē_   QUOTE (GeorgeFP @ Dec 24 2009, 12:47) QUO...   Dec 25 2009, 00:56
|- - NuSkooler   QUOTE (_mē_ @ Dec 24 2009, 16:56) 1. For ...   Dec 25 2009, 01:03
||- - GeorgeFP   QUOTE (NuSkooler @ Dec 25 2009, 01:03) QU...   Dec 25 2009, 20:51
||- - NuSkooler   QUOTE (GeorgeFP @ Dec 25 2009, 12:51) My ...   Dec 26 2009, 03:24
||- - GeorgeFP   QUOTE (NuSkooler @ Dec 26 2009, 03:24) Th...   Dec 26 2009, 09:27
||- - NuSkooler   QUOTE (GeorgeFP @ Dec 26 2009, 01:27) Ano...   Dec 26 2009, 17:17
||- - GeorgeFP   QUOTE (NuSkooler @ Dec 26 2009, 17:17) QU...   Dec 26 2009, 20:05
|- - flacflac   QUOTE (_mē_ @ Dec 24 2009, 18:56) Well, t...   Feb 6 2010, 12:11
|- - GeorgeFP   QUOTE (flacflac @ Feb 6 2010, 12:11) Is i...   Feb 6 2010, 19:04
- - Gregory S. Chudov   Agree. Josh, if you are interested, i'm ready ...   Dec 24 2009, 15:20
|- - skamp   QUOTE (Gregory S. Chudov @ Dec 24 2009, 15...   Dec 24 2009, 16:30
- - Qest   It would be outstanding if the defacto flac tools ...   Dec 25 2009, 01:02
- - Zarggg   Will this program yield any benefit to a (single c...   Dec 25 2009, 05:02
|- - GeorgeFP   QUOTE (Zarggg @ Dec 25 2009, 05:02) Will ...   Dec 25 2009, 22:20
|- - Fandango   QUOTE (GeorgeFP @ Dec 25 2009, 22:20) QUO...   Dec 25 2009, 23:05
- - Fandango   Uhm, I would happily replace all single-threaded c...   Dec 25 2009, 19:29
- - skamp   Encoding two files at once on my Intel Atom with h...   Dec 25 2009, 22:44
- - GeorgeFP   BTW, I've decided to add some missing command-...   Dec 26 2009, 20:18
|- - howesz   QUOTE (GeorgeFP @ Dec 26 2009, 14:18) BTW...   Jul 10 2010, 02:24
|- - Glenda   QUOTE (howesz @ Jul 9 2010, 21:24) QUOTE ...   Aug 7 2010, 09:36
||- - GeorgeFP   QUOTE (Glenda @ Aug 7 2010, 09:36) Same h...   Aug 29 2010, 11:14
|- - GeorgeFP   QUOTE (howesz @ Jul 10 2010, 03:24) QUOTE...   Sep 3 2010, 11:11
|- - gimp   QUOTE (GeorgeFP @ Sep 3 2010, 02:11) QUOT...   Sep 16 2010, 22:09
|- - GeorgeFP   QUOTE (gimp @ Sep 16 2010, 23:09) Removed...   Sep 17 2010, 07:16
- - Meeko   So I'm guessing a multicore FLAC encoder would...   Dec 28 2009, 13:52
- - Fandango   You are right, multi-threaded encoders are for fas...   Dec 28 2009, 15:22
- - clintb   Any chance someone could whip up a batch file for ...   Jan 29 2010, 16:06
|- - Synthetic Soul   QUOTE (clintb @ Jan 29 2010, 15:06) Any c...   Feb 6 2010, 14:29
- - GeorgeFP   An updated version is now available on my site. I...   Sep 19 2010, 09:05
- - Glenda   The encoder flags errors on every attempt with EAC...   Jan 17 2011, 08:47
|- - GeorgeFP   QUOTE (Glenda @ Jan 17 2011, 08:47) The e...   Jan 17 2011, 18:48
|- - Glenda   QUOTE (GeorgeFP @ Jan 17 2011, 12:48) QUO...   Jan 18 2011, 11:02
- - GeorgeFP   It seems that the libraries are of mixed type (32 ...   Jan 18 2011, 12:47
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