My render shows a horizontal line distortion during playback. Increasing the render samples to 500 did not improve the quality at all. How can I make it smooth throughout?
It looks to me like a problem occurring during playback, it's not part of the file.
The distortion is inconsistent between playbacks, and I've only seen it (sometimes) when using VLC. mplayer has no problems.
I don't know if there is anything you can do, this looks like a problem with the program doing the decoding.