Blocky Artifacts with High Bitrate

[Finno]

Having problems getting blocky artifacts during high motion scenes even though I am encoding using a high bitrate.

I'm using TMPGEnc for encoding about 30 mins of PAL video from a DVD source to 480x576 with a constant bitrate of 2550kbps. Audio is 192kbps downsampled to 44khz.

I use DVD2AVI to save a project for frameserving to TMPGEnc.

It's quite annoying because I have done several SVCD's using this method and not come across this problem.

I was under the impression that a very high bitrate should pretty much eliminate motion artifacts.

Any tips or advice would be much appreciated.

[ultimatebilly]

Well, 2550kbps is in no way a high bitrate...
Seems that you will either have to use different TMPEG-settings, and/or have to use prefiltering in avisynth to make the movie more compressible...
Try not using the highest search-precision in TMPEG, but only high...
Some experts think that highest is too much (will detect motion where is none->blocks)...

Oh, and welcome to the forum :D

[Finno]

I thought that the maximum video bitrate for SVCD was 2600kbps. And that the combined video and audio bitrate must be under 2756kbps.

That's why I refered to 2550kbps as high.

I will try changing the motion search precision down a notch to 'high'. Is this still used when I am encoding as constant bitrate? Would variable bitrate actually be better than constant?

Because I am only encoding about 30 mins I thought using constant at almost the highest bitrate would produce the best results but it doesn't seem to.

Thanks for welcoming me! :)