PP Export has Pixelation artifacts/aliasing - Need help

[Audionut]

I'm pretty sure Vimeo uses x264 for conversion, and using the right settings, means no conversion of footage.

So there are 2 ways really (from a quality standpoint).  Having the bandwidth to upload some minimal compressed footage and letting Vimeo deal with it.
Using correct settings, and gaining full control over the rendered quality (you can tweak AQ, psy-rd, some other settings, and use things like experimental FGO without affecting the things that determine if the footage needs to be converted by Vimeo).

[Luiz Roberto dos Santos]

Audionut, you are sure that vimeo will not make a new compression? I wonder, because if we decide to use some parameters like "high-level" (more complex algorithm) ME and subpixel ME and other tricks, the final file will be very large in some cases... how vimeo deal with it? Vimeo are using high accelerated HTML5 streaming, but I don't think it will be sufficient for 3GB file size, or so on. You know about it?