AVI Type 1 and 2 at DVinfo.net

Adam Rench · December 20th, 2005, 09:15 PM

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

Andre De Clercq · December 23rd, 2005, 10:15 AM

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.

Adam Rench · December 23rd, 2005, 10:31 PM

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?

Andre De Clercq · December 24th, 2005, 05:00 AM

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

December 20th, 2005, 09:15 PM	#1
Adam Rench Major Player Join Date: Nov 2004 Location: Dallas, Texas, USA Posts: 386	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

December 23rd, 2005, 10:15 AM	#2
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	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.

December 23rd, 2005, 10:31 PM	#3
Adam Rench Major Player Join Date: Nov 2004 Location: Dallas, Texas, USA Posts: 386	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?

December 24th, 2005, 05:00 AM	#4
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	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