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What is the compression percentage of your FLAC library?
JJZolx
post Sep 22 2012, 03:32
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I've always been curious about the average compression rate across my whole FLAC library.

My library is just shy of 36,000 files, with a makeup of about 40% rock, 40% jazz, and the remainder a mixture of bluegrass, country, classical, folk, rap, electronic, etc. It's all encoded at the default -5 level, and the tagging consists of basic text fields, with no embedded images. I compared the total file sizes in bytes to the calculated expanded music size.

It worked out to 41.9% compression on the entire library.

Total FLAC files size: 925.092 GB (993,310,377,824 bytes)
Total uncompressed size: 1580.926 GB (1,708,243,555,030 bytes)
Ratio: 0.581
Compression: 41.9%
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[JAZ]
post Sep 22 2012, 19:11
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What is wrong is the assumtion that kilobits per second (kbps) are in powers of 2. They are not.

Also, your calculation would be like doing the opposite (as if 16 x 2 x 44100 was in powers of 2). . Actually, that was correct (you're dividing the samplerate. I had read it backwards)

This post has been edited by [JAZ]: Sep 22 2012, 19:30
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Posts in this topic
- JJZolx   What is the compression percentage of your FLAC library?   Sep 22 2012, 03:32
- - Porcus   All encoded with -8, figures reported by foobar200...   Sep 22 2012, 10:56
- - JJZolx   So only 35% and 38.6%, respectively. Interesting.   Sep 22 2012, 14:59
- - xnor   I limited results to: %codec% IS flac AND %__bitsp...   Sep 22 2012, 15:42
- - JJZolx   Man, that's only 30.3%. A sample size of thre...   Sep 22 2012, 17:09
- - [JAZ]   you didn't calculate Porcus's values corre...   Sep 22 2012, 18:38
|- - JJZolx   Thanks. The 614 kbps calculation was wrong, but as...   Sep 22 2012, 19:03
- - xnor   The files I selected above have a total duration o...   Sep 22 2012, 19:09
- - [JAZ]   What is wrong is the assumtion that kilobits per s...   Sep 22 2012, 19:11
- - xnor   Afaik kbit/s means kilo bits per second = 10^3 bit...   Sep 22 2012, 19:15
- - Porcus   As long as the denominator of 1411.2 k has the sam...   Sep 23 2012, 13:48
- - Remedial Sound   FWIW my lossless library is "only" 3,800...   Sep 23 2012, 19:50
- - shakey_snake   CODEDuration : 1wk 6d 18:13:27.801 ...   Sep 26 2012, 06:21
- - A_Man_Eating_Duck   mine is CODE GB MB B Compression WAV...   Sep 26 2012, 07:05
|- - Porcus   QUOTE (shakey_snake @ Sep 26 2012, 07:21)...   Sep 26 2012, 19:10
- - Kohlrabi   I only have FLAC -8 files, and filtering via ...   Sep 26 2012, 08:09
- - A_Man_Eating_Duck   Ha The encode script i'm running is only che...   Sep 27 2012, 23:56
- - tuffy   Not counting the metadata blocks, it works out to:...   Sep 28 2012, 14:33
|- - godrick   QUOTE (tuffy @ Sep 28 2012, 15:33) Not co...   Oct 6 2012, 22:58
|- - tuffy   QUOTE (godrick @ Oct 6 2012, 16:58) Tuffy...   Oct 7 2012, 02:52
|- - godrick   QUOTE (tuffy @ Oct 7 2012, 03:52) QUOTE (...   Oct 10 2012, 00:08
|- - tuffy   QUOTE (godrick @ Oct 9 2012, 18:08) To ch...   Oct 10 2012, 14:21
- - imre_herceg   My library is about 95% Classical music. Average ...   Oct 6 2012, 15:35
- - SigHunter   my FLAC library has an average of 930 kbps which m...   Oct 12 2012, 12:14
- - godrick   tuffy, thank you for posting the script - it works...   Oct 14 2012, 14:21


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