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| njahnke |
| Posted: Apr 23 2013, 05:31 PM |
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Newbie
Group: Members
Posts: 2
Member No.: 24228
Joined: 17-September 08
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having trouble finding discussion on this by searching the forum. i know that virtualdub writes pcm audio to avi files without being limited by the (2^32)-1 length limit in the riff header. then i can successfully read all of the audio data with other software such as ffmpeg. however i have less luck with avisynth's avisource() - the audio is cut off at the 32-bit boundary (something like 6 hours in for cd-quality stereo audio). does vdub simply write sequential 4 gb chunks? if so then that would explain the occasional incompatibility - some software doesn't look for more than one audio chunk. any insight on this would be appreciated. i'm not looking to solve a specific problem here, just curious what the conventions are and where incompatibilities arise. thanks. |
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| phaeron |
| Posted: May 5 2013, 08:13 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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There's a base AVI segment and extension AVIX segments. I think in Avisynth you need an alternate import path to read the extended file, like OpenDMLSource or something like that (don't have the docs in front of me at the moment). |
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