Old 08-08-2002   #1
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Difference Between .asf and .avi Files

When I go to dl videos, usually animes, from DC++, I usually get em in .avi format, but sometimes they also come in .asf format. What's the difference between em? I'm pretty sure .asf is older and has worse compression, quality, and error correction. Also I find a bunch of different file formats annoying, so I want to rename .asf into .avi, is that ok? Will there be compatiblity problems on other machines or software?

Thanks in advance for your help,
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Old 08-08-2002   #2
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Well, actually AVI is quite older. ASF is Microsofts little attempt to own the video world as well as the OS world. However AVI and ASF are not the asme.

Simply renaming the files however, wouldn't work. They use different codecs to de-code the files.

The thing is, most AVI files you download would probably be encoded with DivX, much superior to the ASF encoding. SO if you don' t like the ASF format, don't download it.
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Old 08-08-2002   #3
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ASF uses codecs, just as AVI does. They only differ in the internal structur.
IMHO, Microsoft wanted just a new format, just as a child wants new toys now and then.

I have the ASF file format description here, it is about 100 pages large, but I can't find any advantage to the AVI file format.
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Old 08-08-2002   #4
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Thanks, I'll try to download only .avi, but some of the older fansubs are rare and only available in .asf formats. I tried to rename a few and some works and some don't, mostly works, so I guess I'll have to try to redownload em if I have the time.

Thanks, if you have any other comments or etc. please reply,
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Old 09-08-2002   #5
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See What is the difference between DivX, ASF, MPEG4, SMR, etc .

DivX 3 & 4 were hacked versions of the Microsoft ASF format which removed some of the proprietary limits. DivX 5 is not hacked, but was developed as a new project.

DivX files use the same AVI suffix as the standard Windows video file, but the DivX AVI will not play without the proper codec installed.
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Old 11-08-2002   #6
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DivX files use the same AVI suffix as the standard Windows video file

A divX IS a windows avi file. And you need the proper codec for every AVI file to play it.
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Old 12-08-2002   #7
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dfourthhorseman,

Since hacked DivX files are essentially ASF files with a different container, ASF files can be easily converted to AVI files by following the instructions in ASF TO AVI CONVERSION GUIDE v1.0.

A good definition of AVI files can be found at DivX FAQ - What is an AVI ?.
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