Need help dealing with blockiness

[dragon_warrior]

Ok, here comes another question from me :)

As usual, sample first: http://www.multiupload.com/XSEIB2Y90H

Here are the problem that I've encountered so far: the sparks 'rain' that mpeg2 can't encode transparently at a bitrate of ~ 7Mbit is causing blockiness, which is very nasty and annoying.

So can we make them look as they're supposed to? Also, I'm gonna encode the video to h264 using crf mode, what is the value of --crf xx should I choose to achieve a smooth view during playback? Thanks

[dragon_warrior]

Looks like not many of you interested in this problem for the last couple of days. I'll provide some shots of what I was talking about:

http://thumbnails28.imagebam.com/13652/bceb67136510331.jpg (http://www.imagebam.com/image/bceb67136510331) http://thumbnails26.imagebam.com/13652/c26a0e136510337.jpg (http://www.imagebam.com/image/c26a0e136510337) http://thumbnails28.imagebam.com/13652/8650db136510345.jpg (http://www.imagebam.com/image/8650db136510345)
http://thumbnails44.imagebam.com/13652/ced4b5136510351.jpg (http://www.imagebam.com/image/ced4b5136510351) http://thumbnails11.imagebam.com/13652/4933db136510356.jpg (http://www.imagebam.com/image/4933db136510356) http://thumbnails26.imagebam.com/13652/2d71b4136510361.jpg (http://www.imagebam.com/image/2d71b4136510361)

And new problem coming up when I ran into another video.
Actual size: http://thumbnails15.imagebam.com/13652/65a66f136510829.jpg (http://www.imagebam.com/image/65a66f136510829) http://thumbnails26.imagebam.com/13652/2be56d136510830.jpg (http://www.imagebam.com/image/2be56d136510830)

2x upsized using Spline36Resize http://thumbnails35.imagebam.com/13652/72913e136510832.jpg (http://www.imagebam.com/image/72913e136510832) (the noise / blocking around her head) http://thumbnails12.imagebam.com/13652/05e0be136510838.jpg (http://www.imagebam.com/image/05e0be136510838) (the color "ghosting")

Hope someone will help me find a decent solution, many thanks