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AVI Testing Ground
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If you suspect that one of the codecs are missing from your machine, click on the "Test" active link to the right of the codec type and it will load a standardized 3 second clip using that codec. The last column contains the known information as to where to get the codec. CODECs marked by GREEN BACKGROUNDS are those that were not designed by their makers to be shared between machines. While many a downloader has added these codecs, DO SO AT YOUR OWN RISK!


Codec/Extension
"4cc" Name
 Avi Codec type and information
Press to test
Link to download the Codec
Mpg4.1
( NOT MPG or MPEG)
vidc:mpg4 Mpg4x.x (wrongly referred to as mpeg ) -- AVI by Microsoft. Known as Mpeg4c32. It is widely accepted that Microsoft attempted to take control of the MPG$ standard by coming out with an avi version of the codec prior to the MPG consortium having voted a final standard. The code had to be completely reworked 3 times. Making matters worse, M$ refused to rename the files, and since they were not backwardly compatable even more distress was created. 
from M$
Mpg4.2
( NOT MPG or MPEG)
vidc:mp42 For a few months 4.2 wasn't supported - now some can download it from M$, others can't.  If you can't, after re downloading wmp6.4, get the mpeg4.x files to play, you might want to try the Smr patch (look for the "smr patch" between current newsgroups and Powerpost).
from M$
SMRpatch
Mpg4.3
( NOT MPG or MPEG)
vidc:mp43 For alnost a year mpeg43 was not supported,  now with the "new Media Player 6.4 and 7.1" they are all back - Mostly. If you still can't, after re downloading wmp6.4, get the mpeg4.x files to play, you might want to try the Smr patch (look for the "smr patch" between current newsgroups and Powerpost).
from M$
SMRpatch
RLE
vidc:mrle RLE - early RAW codec.  Used by several current codecs in decoding/reading. Codec should load with the standard Microsoft bundle Codec download with it's player.
fromM$
Techsmith
vidc:tscc The standalone TechSmith Screen Capture Codec. Used often for live stream capture of video content. Look for the Techsmith Camtasia download.
Techsmith
un-
compressed
Avi
vidc.avi0 AVI -- NativeVideo for Windows format.
AVI video codec developedby Intel for Microsoft as M$ started to compeate with Apple. Multiple codecs used this as their startiing point. The sample here is only 1 second long, and still is three times larger than any other clip here. 
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