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| isidro |
| Posted: Nov 19 2012, 10:47 PM |
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Advanced Member
Group: Members
Posts: 82
Member No.: 7195
Joined: 8-November 03
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When I binary compare extracted WAVs from AVIs, I find out that there's a small block (titled JUNK followed by some 0x00) right after the header, I get some warnings in other programs (ie FLAC) about this metadata being lost. Could it be posible to generate WAVs without this metadata?
Or else whats the use for it?
Thanks! |
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| dloneranger |
| Posted: Nov 20 2012, 06:15 AM |
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Moderator
Group: Moderators
Posts: 2366
Member No.: 22158
Joined: 26-September 07
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It's normal behaviour for virtualdub
JUNK sections are just that, a small section of 'you can ignore this bit' that can be discarded
You can just let any other program discard it
There are 2 sizes of wav headers - the normal wav header and a larger one for files over 2GB
What happens is that the largest size is saved at the beginning, then the wav data is saved
Then if the file is >2GB the WAV64 header is filled in
If the file is <2GB, the normal wav header is filled in
But because the normal header is smaller, there are a few bytes of nothing in between the header and the data, so that's filled in with the JUNK section
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MultiAdjust JoinWav WavNormalize FFMPeg Input Plugin v1827 UnSharpMask
Windows7/8 Codec Chooser
All FccHandlers Stuff inc. Installers for acm codecs AAC, AC3, LameMp3 |
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| phaeron |
| Posted: Nov 24 2012, 08:47 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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That's pretty strange... no program should be warning about a "JUNK" chunk being lost. It's specifically for padding out parts of the file and doesn't have any attached meaning.
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