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Problem with large multichannel file, 7 channels, 24-bit @ 48 kHz, & 3:48:18.77
xslig
post Mar 7 2012, 17:09
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The uncompressed file is ~12.9 GB and the "wavpack -f" file is ~6.8 GB
QUOTE
#$ wavpack -f --raw-pcm=48000,24,7 --channel-order=FL,FR,FC,LFE,BC,SL,SR fellowship.raw

WAVPACK Hybrid Lossless Audio Compressor Linux Version 4.60.1
Copyright © 1998 - 2009 Conifer Software. All Rights Reserved.

created fellowship.wv in 1116.22 secs (lossless, 78.56%)
#$ wvunpack -ss fellowship.wv

WVUNPACK Hybrid Lossless Audio Decompressor Linux Version 4.60.1
Copyright © 1998 - 2009 Conifer Software. All Rights Reserved.


file name: fellowship.wv
file size: 2960974266 bytes
source: 24-bit ints at 48000 Hz
channels: 7 (FL,FR,FC,LFE,BC,SL,SR)
duration: 3:48:18.77
modalities: lossless, fast
compression: 78.56%
ave bitrate: 1729 kbps
encoder version: 4
file wrapper: 68 byte RIFF header

I can play the file in DeadBeef (it uses libwavpack instead of ffwavpack), but can't seek past ~92 minutes. DeadBeef will play everything beyond ~92 minutes as long as I start playing the file before ~92 minutes.

I've compressed similarly large 24-bit but 6-channel files before, and this didn't happen.

The source file is the lossless audio from the "Lord of the Rings: The Fellowship of the Ring: Special Extended Edition" blu-ray
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xslig
post Mar 8 2012, 15:50
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QUOTE
Another weird thing is that on my Linux distro (Ubuntu 8.04; I know itís old ) I canít even create or open(!) files over 2 GB with the command-line tools. What distro are you using? Did you create a custom build or something?

I was using the version from Debian Stable. http://packages.debian.org/stable/sound/wavpack
I also tried the version from Debian Unstable, but got the same results. http://packages.debian.org/unstable/sound/wavpack

QUOTE
Iím not sure about the stuttering on hybrid lossless either. Especially in ďfastĒ mode you should not be running out of CPU...does it play better if you rename or move the correction file so itís not used?

Heres a sample. http://www.mediafire.com/?15jms455cpxxpj6
I used "wvunpack -i" to produce this sample. (The uploaded sample is the lossy compressed as lossless.) Using "wvunpack" (using the correction file) also produced these results. In the sample, you'll notice that only the channels that are paired together (FL+FR, SL+SR) are affected by stuttering.
The lossless (not hybrid lossless) decompressed correctly.

QUOTE
In any event, all these problems will be fixed once I finish the development Iím working on with large file support

It may be possible that some of the previous files I've compressed may be affected by this (but I don't think so, because I check them after encoding; also this is also my first file of >6 channels that I've encoded.) Would I have to re-encode them for proper playback once you implement large file support? (All of the files should be in matroskas if that matters.)

When is the library that can handle larger files schelduled to be released?

Thank you for your response.
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