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Page 1 of 1: ASF to AVI Conversion Guide

Note: If the instructions below does not work, you can try this alternative ASF to AVI conversion guide.

Microsoft's ASF format is also based on the MPEG-4 compression technology (an earlier version of the format used in DivX), but the problem with this container format is that it is proprietary, and not too many ASF editing/conversion tools are freely available.

By converting ASF to AVI, one can access the wide range of AVI/DivX software tools, and luckily, converting between the two containers is extremely easy and will only take a few seconds. Another advantage of converting ASF files to AVI is that you will be able to easily skip to sections in the video (ie. keyframes) and in a few of my conversions, the file size actually decreased by about 20% without any loss in quality.

Below is an short instruction on how to do this :

Start by downloading and installing the following software :


1. Installing the required software :
    Please install both the MPEG-4 VKI codec and the VirtualDub software. Instructions on installing the MPEG-4 codec are on the download page.


2. VirtualDub conversion :
    Once you have all the required software installed, you'll need to do the following in VirtualDub :


      1. Load your ASF file into VirtualDUB.
      2. From the "Video" menu, select "Direct Stream Copy".
      3. From the "Audio" menu, select "Direct Stream Copy".
      4. Save the AVI file - your have just converted your ASF file to a brand new AVI file - it should have only taken a few seconds for the "conversion", since all you really did was change the container from ASF to AVI.

 

 

 

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  • Date Updated: Feb 25, 2001

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You8 do not specify if your downloads are for Windows or for Macs
Posted by: sailez, 19:44:26, Oct 18, 2006


Did not work, will not even load the file. Sadly it has an .avi extension, yet says there is not .asf support. Ideas?
Posted by: Pcubed, 07:29:28, Jan 19, 2007


Pcubed: The download link was linked to a wrong file, it has now been fixed. With that said, ASF support is still fairly hit and miss.
Posted by: DVDGuy, 14:51:54, Jan 19, 2007



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