View Full Version : FLAC Encoding 0-8 Compression
Hello,
Regarding FLAC, if there's no difference in quality using 0-8 compression levels then what's the difference? If it just takes less encoding time using 0 and more using 8 and it's all lossless what's the difference? Something to do with error checking? What's the advantage? Output is the same right?
garym
01-12-2015, 07:04 PM
Hello,
Regarding FLAC, if there's no difference in quality using 0-8 compression levels then what's the difference? If it just takes less encoding time using 0 and more using 8 and it's all lossless what's the difference? Something to do with error checking? What's the advantage? Output is the same right?
decoded output file is the same, remember lossless=lossless=lossless! An "8" compression saves more space (slightly smaller files). But the difference is not large in terms of file size space saving. It takes LONGER to compress at 8 vs 0 as you note, but with modern CPUs this is not a major issue either. Error checking, etc. is the same regardless of compression level. So bottom line, there really is no practical difference.
Doesn't "0" compression level mean no compression at all, i.e., a pure PCM file in a FLAC container? If that's the case, the file size would likely be about twice that of a file compressed at level 5. My recommendation: Use the default value of "5" and don't worry about it. I think it will take longer to compress at level 8 and the gains realized are insignificant.
Dennis..aka "d2b"
Spoon
02-07-2015, 05:28 AM
No 0 is still compressed, it is the special 'uncompressed' option that is uncompressed.
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