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Old 01-09-2009, 08:00 AM
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Default Re: Compressing large JPEG files.

Quote:
Originally Posted by kgun View Post
Do you know the game Free Tetris ? (Note different levels).

You may get holes there if you are not clever enough.

That is why "fractal compression" has been so efficient.

Related thread:

http://www.webproworld.com/breakroom...tml#post397214

There is not much difference in quality between the 33.9 Mb movie (post #20) and the compressed:

I just tested it and converted your video to a full screen .wmv file of approx 7mb (down from your file that was about 34mb). (post #29).

See post 33# if the link in post #29 get removed.

So in a sense, efficient compression is like being an advanced tetris player
(I keep getting the same homepage loop every time I click the link on the page "Click here to play").

I've found video compression totally different than image compression. A movie can be compressed a lot and still look the same. I would guess this is because most of the movie/video clips are of such low quality and low sampling rate that they can be compressed more without looking any different. There's a free program called "SUPER.exe" that will convert any kind of video file to any other kind of video file. I've found it very interesting in learning about bit rates, formats, and Codecs with regards to file size Vs. quality. Another thing, if you want to convert a poor quality FLV into say a WMV or AVI, if you use the better settings the result will look WORSE than using a lower setting (lower bit rate), because the lower bit rate won't show the detail, therefore won't show the huge compression artifacts and other artifacting associated with low quality files. It, in a manner of speaking, "smooths out" the jagged edges and compression anomalies.
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