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#399 exhaustive-model-search causes enormous multi-gigabyte files in rare cases
Hi,
On a particular input file, FLAC (testing with current git) greatly inflates its output if I encode at level 7, which enables --exhaustive-model-search. The source is a 24-bit WAV file of about 60MB; flac -6 encodes this to a 43MB FLAC file, but flac -7 produces a 9.1GB (!) file.
The enormous file does seem to be perfectly valid, FWIW -- it (eventually) decodes to a WAV that's identical to the source file.
The copyright on the offending file belongs to the band that uploaded it to our service, so I can't provide it as a public download, but I can supply it to a developer privately.
Command lines and encoder output is as follows:
lsd@cletus:~/projects/flac-bug$ time ./flac/src/flac/flac -f -7 -o /data/moredata/flac-bug/7.flac 2303997286.wav 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. 2303997286.wav: WARNING: legacy WAVE file has format type 1 but bits-per-sample=24 2303997286.wav: WARNING: skipping unknown chunk 'cue ' (use --keep-foreign-metadata to keep) 2303997286.wav: wrote 9708061456 bytes, ratio=164.494 real 2m18.059s user 0m34.836s sys 0m4.480s lsd@cletus:~/projects/flac-bug$ time ./flac/src/flac/flac -f -6 -o /data/moredata/flac-bug/6.flac 2303997286.wav 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. 2303997286.wav: WARNING: legacy WAVE file has format type 1 but bits-per-sample=24 2303997286.wav: WARNING: skipping unknown chunk 'cue ' (use --keep-foreign-metadata to keep) 2303997286.wav: wrote 44402581 bytes, ratio=0.752 real 0m1.471s user 0m1.368s sys 0m0.065s
Is this still a problem with the 1.3.1 release?