Converting to Divx Issues?

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fafafake

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My friend gave me some shows recently; he downloaded them as .avi and converted them to .divx video. As I understand it, divx is generally the best video codec, but i dont know much about that. Anyway, I had a choice between getting the shows in their original format or divx, but I chose the original avi because the divx files were half the size. Where an episode in the original package was 350mb, the converted divx file was 175mb.

If divx is greater quality, why is it so much smaller? Might it be something my friend did in the conversion process?
 
DivX files are simply a compressed form of AVI files. You'll notice the file extension for DivX or XviD files is still .avi. DivX is a very good way to greatly reduce the file size of video files with much less loss of quality compared to older methods like video CD (MPEG1). But, compressing an uncompressed AVI file will of course result in lesser quality than the original uncompressed AVI.

DivX is a very high quality way to compress video files. But, the original files will always look better. 4GB+ DVDs are often compressed and converted to 700MB DivX files when people post them on the web. The DivX files look pretty good considering the great reduction in file size. But, they don't look near as good as the DVD. Think of DivX for video as you would think of mp3 for audio. It's amazing the quality that can be retained while greatly reducing the size of a file, but an mp3 will never sound as good as a CD it was compressed from.

It's possible the AVI files you downloaded were already converted to DivX or XviD and your friend just compressed them even more. It's not common to download uncompressed AVI files. You can use a program like AVIcodec to analyze just about any video file and get all the information about the file. Bitrate, audio, frame size, codec used, etc... http://avicodec.duby.info/
 
DivX files are simply a compressed form of AVI files. You'll notice the file extension for DivX or XviD files is still .avi. DivX is a very good way to greatly reduce the file size of video files with much less loss of quality compared to older methods like video CD (MPEG1). But, compressing an uncompressed AVI file will of course result in lesser quality than the original uncompressed AVI.

DivX is a very high quality way to compress video files. But, the original files will always look better. 4GB+ DVDs are often compressed and converted to 700MB DivX files when people post them on the web. The DivX files look pretty good considering the great reduction in file size. But, they don't look near as good as the DVD. Think of DivX for video as you would think of mp3 for audio. It's amazing the quality that can be retained while greatly reducing the size of a file, but an mp3 will never sound as good as a CD it was compressed from.

It's possible the AVI files you downloaded were already converted to DivX or XviD and your friend just compressed them even more. It's not common to download uncompressed AVI files. You can use a program like AVIcodec to analyze just about any video file and get all the information about the file. Bitrate, audio, frame size, codec used, etc... http://avicodec.duby.info/
 
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