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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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JJZolx
post Sep 22 2012, 17:09
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Man, that's only 30.3%.

A sample size of three doesn't mean much, but I'm surprised at the range - from 30.3% to 41.9% compression. I'm guessing that library content must be the big difference maker here.
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- 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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