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Dan203 said:
One possible explanation for these quality problems could be framerate conversion. TiVos only support video with a frame rate of 29.97fps. Some movies are actually filmed at 24fps. That means that Amazon has to use some sort of framerate conversion to make them compatible with TiVo. There are various methods for doing framerate conversion, and some work better then others. These sort of motion artifacts are actually characteristic of some of the poorer techniques.

If it is a framerate conversion problem, then it would explain why it only effects some movies as only some use the 24fps "film mode".

This isn't a new Unbox problem. All NTSC video is 29.97 fps - any film to video conversion has to deal with the 24-->29.97 conversion. Obviously there are known ways to do it right or we'd have been complaining about DVDs years ago.
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