Whats the difference between DVD and AVI playback?

[xMax]

If an uncompressed AVI animation in binary form, simply stores the RGB values for each pixel of each image that makes up the animation, then what would a DVD animation be.

Is it simply a higher resolution? And if it is, then whats the difference between an AVI animation and a DVD animation if they both have the same resolution.

 

[kylebisme]

AVIs tend to be progresive scan, while DVDs are always interlaced. And yeah, resolution can go either way on AVIs while DVDs are 720x480.

 

[xtknight]

A DVD is compressed with MPEG-2 whereas you're talking about an uncompressed format in an AVI container.

 

[xtknight]

For the record, the MPEG-2 is not a big table of RGB values like AVI. An MPEG-2 stream contains GOPs (groups of pictures). These GOPs contain I (key frame), P (prediction), and B (bidirectional) frames. I frames contain a very good quality image while P and B frames predict the delta between the I frame and the next frame to save space. The amount of I, P, and B frames varies per implementation.

Edit: sorry didn't see your summary, but aren't consumer DVD-R movies always compressed? What specifically do you mean by DVD? You can burn an uncompressed video on to a DVD-R disc.

 

[zephyrprime]

Is it even possible to have an uncompressed DVD? Aren't DVDs always compressed with mpeg2?

Anyway, AVI is just a wrapper format. It can be anything some programmer wants it to be. At the same file size & resolution, an AVI could be worse, the same, or better than a DVD depending on the codec used.

 

[xMax]

to Xtknight: what i ment was DVD file format. but all is ok. i just want an uncompressed file format like AVI uncompressed or even BMP playback. dont ask me why, because its not for a typical reason. but now i know that DVD is something complex and involves compression and is not made up of basic table of RGB values.

thank you. you gave me all the info that i needed.