Archived from groups: rec.video.desktop (
More info?)
don wrote:
> kaczor wrote:
>
>> I am a newbie, but a newbie who is going insane over this...
>>
>> I have a bunch of DV-AVI files that are over 4GB in size. I want to
>> split them into smaller files, such that I can use the Panasonic
>
> ...
>
>> Can someone please enlighten me? This should not be this challenging!
>
>
> ...
>
> Maybe you could get an old ulead on ebay.
I actually found a program that seems to do a relatively good job:
Solveig AVI trimmer. I believe it does not re-render the files, and is
relatively fast.
http://www.solveigmm.com/?Products&p=AVITrimmer
>
> BTW, what is AVI type 2?
I am not an expert, but I belive that the only real difference between
AVI type 1 (DV-AVI) and AVI type 2 is that the latter has a separete
audio track, in addition to the interleaved one.
A proper explanation, from another post:
Markus Zingg Jan 4 2004, 11:33 am
Newsgroups: rec.video.desktop
From: Markus Zingg <m.zi...@nct.ch>
Date: Sun, 04 Jan 2004 20:33:27 +0100
Local: Sun, Jan 4 2004 11:33 am
Subject: Re: What does type-1 and type-2 mean?
....
However,
the difference between type 1 and type 2 avi is:
Type 1 DV avis actually contain the data mostly as it came in from the
camcorder just lightly wrapped into the avi file format. With DV avi,
audio is interleaved into each video frame. That's one of the main
reasons why DV avi is usually quite resistant to a/v synchronisation
issues.
Type 2 DV avis also contain the original data stream as sent from the
camcorder. However, the capture application - during the capture
process - extracts the audio part out of the frames and a second
dedicated audio data stream is stored within the avi file. If this is
done propperly this does not form a problem.
The advantage of type 1 avi's is that they obviousely need less space
on the HD and need less processing power during capture. The
disadvantage fo type1 avi's is that they are not compatible with
standard avi's. Standard avis always expect a dedicated aditional
audio datastream and in order to avoid problems. M$ created the avi
type 1 specification so as this kind of files get a special header
which avoids that standard software can operate on them. A severe
disadvantage of type 1 avi's is that the editing process is a lot more
complicated because audio must be constantly written into the video
frames to the propper places and those who know the DV format in
detail will agree that this is a night mare. The DV format was choosen
with robustness with regard to the camcorder hardware (video heads &
tape) in mind. From a software only point of view it apears to be
braindead but it's of course not.
The advantage of type 2 avi's is that they can be processed with any
video editing/processing software povided a working DV decompression
filter or codec (depending no the technology used by said software) is
installed in the system. The disadvantage with type 2 avi's is that
they are slightly bigger (due to the doubled audio data). Editing is -
as oposed to type 1 - not more difficult that with any other avi
format. The original audio data within the video frames just remains
there unchanged, the aditional audio stream contains the "real" audio
data. This showes another disadvantage of type 2 in that the audio
data - during print back to tape - must be injected into the video
frames before they are transmitted to the camcorder.
You can see that both formats have their pros and cons. If you have
compatibility / interoperatibility in mind, type 2 is the way to go.
If all the software you intend to use supports type 1 then there is
nothing wrong with using type 1. Btw, there is an easy trick to
remember which is which. Type 1 means 1 audio stream (the original
one) type 2 means two audio streams (the original one and the copy).
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