same, im still have some probs whit Certain Codec.. I use, k-lite basic,,,, The Best one for me, cuz i dont want Media Player Classic.... i hate it.... and, ,, he have no Bugs in this one....
anyway....
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NOTE
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The K-Lite Codec Pack contains a tool called MediaInfo Lite. With that you can get a lot of useful information about a media file. For example what kind of audio and video format it contains.
See this link for more info !! :
http://codecs.freeforums.org/tutorial-getting-information-about-a-video-file-t1014.html
****this link is only for help whit Codec, Nothing related whit ''VideoThumbnailsMaker''*****
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So, i suppose , if we use this tool of k-lite, we will know what codec or Filter we need to Decode WMV Files.....
I hope i can help a little bit....
Peace