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Old December 20th, 2005, 09:15 PM   #1
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AVI Type 1 and 2

Hey all,

I'm seeing that there are two versions of AVI formats. 1 and 2. I googled and couldn't find anything. Could anyone explain to me what the differences are?

Thanks
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Old December 23rd, 2005, 10:15 AM   #2
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DV is one of the datastreams which can be packed in an AVI format. The standard AVI packing has an audio stream and a video stream. DV however has merged audio and video streams and thus Microsoft made a special type for DV named Type 1 containing only the DV stream. For the standard and most universal version (Type 2), the audio stream is being extracted and copied in a separate audiostream. while the original audio also remains in the DV stream.Type 2 is more universal. but needs some extra processing power when captured (splitting) and somewhat more space (5%)because of the DV audio is not removed in the DV stream part.
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Old December 23rd, 2005, 10:31 PM   #3
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ahh. very interesting. Thanks for the easy to understand explanation. Just one more question then. When importing an AVI Type 1 file into an NLE (in my case, Avid) does it split the video into one track, then the audio into left and right audio tracks?
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Old December 24th, 2005, 05:00 AM   #4
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Yes, depending on the NLE, which interprets the header, it will use (split) DV audio (L and R) for type1 or the AVI audio stream for type2
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