[flac-dev] Message about compression ratio with stdin input
Erik de Castro Lopo
mle+la at mega-nerd.com
Tue Jul 1 03:25:48 PDT 2014
lvqcl wrote:
> Reproducible with the following command line:
>
> flac --ignore-chunk-sizes - -o out.flac < test.wav
> src/flac/flac --ignore-chunk-sizes - -o a.flac < flac-test-stereo.wav
I get this:
flac 1.3.0, Copyright (C) 2000-2009, 2011-2013 Josh Coalson & Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
welcome to redistribute it under certain conditions. Type `flac' for details.
INFO: Make sure you know what you're doing when using --ignore-chunk-sizes.
Improper use can cause flac to encode non-audio data as audio.
-: WARNING: skipping unknown chunk 'LIST' (use --keep-foreign-metadata to keep)
-: WARNING: 'data' chunk has non-zero size, using --ignore-chunk-sizes is probably a bad idea
(No runtime statistics possible; please wait for encoding to finish...)
(No runtime statistics possible; please wait for encoding to finish...)
-: INFO: hit EOF with --ignore-chunk-sizes, got 148471808 samples
FAILURE: Compression failed (ratio 7742270.591, should be < 1.0).
This happens for some files for one or more of the following reasons:
* Recompressing an existing FLAC from a higher to a lower compression setting.
* Insufficient input data (eg, very short files, < 10000 frames).
* The audio data is not compressable (eg a full range white noise signal).
Removing the last four lines is easy but is it sufficient?
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
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