Megui - serious macroblocking

[enchant]

I haven't done a lot of configuration with Megui, and don't know the ins and outs of video encoding like most of you, but I've never had a lot of problems before. I've always been able to take an avi or mp4 video and encode subtitles, getting a high quality output.

However, on the latest show I'm working on, there's serious macroblocking throughout. Here's a cropped section of a frame:

http://pat.ssih.com/images/macroblocking.jpg

I've pared down the avs file to nothing but:

directshowSource("Propose Kyoudai ep01 (1024x576 x264).mp4")

I find the myriad of configuration options in Megui a bit daunting, and I'd appreciate any help I could get.

Thanks in advance.

[Sharktooth]

broken directshow decoder. if you're on win7 install ffdshow and apply the Win7 DS filter tweak.

[enchant]

What if I'm on WinXP?

[Sharktooth]

oh. play the avs in a directshow media player (MPC for example) and see if the artifacts are still there.
in that case, it's still a broken decoder.

[enchant]

Good call, Sharktooth! I installed the latest version of the decoder, and it appears that the macroblocking is gone. Thanks!!