High motion = blockiness in mpeg

[Todd7]

I have a video I captured with virtualdub and encoded with tmpgenc to mpeg (my ultimate goal is to put it on a vcd). The quality for 90% of the video is great. The average person would not see any digital blocks, artifacts. However there is one scene where the camera is panning and half a dozen people are all dancing around and their is a lot of motion in the scene. The quality goes to pot, with blocks (I think they are called digital artifacts) most places and very noticable to the average eye.

Should I encode this scene with different settings to compensate for the high motion, and if so what settings?

To my eye the avi looks fine. The mpeg is where the problems come up.

[andkiich]

If you are going to keep this as a spec VCD, then you'll just have to live with the macro blocks. The only way to prevent this is to throw more bitrate at the MPEG during conversion time. VCD standard dictates 1150 across the board.

If you want to make a non-standard VCD, then that will most likely fix your problem as you can increase the bitrate, but you might then run into compatibility issues with some stand alone players.

[Todd7]

I tried again with the fxVHS filter through virtualdub for this one scene and encoded the scene with tmpgenc. This has much better results, but not perfect.

The avi looked good to my eye, but I guess there could be noise that I don't notice. My therory is that the mpeg has a fixed bitrate as you mentioned. If there is noise then that noise could be using some of the available bitrate, right? By eliminating some of the noise then that bitrate can be used for true motion?

Does this make sense? Any other suggestions to get the best results that vcd can have? (Yeah I know if I want "best" try dvd, but I am stuck on this vcd thing)