Avi Playback Macroblocks

[Aaron407]

I have a problem.

Until about two days ago, I've had nothing but good luck with playback of all avi movies on my computer. But now there are macroblocks on playback that weren't there before. It's like the movie is encoded with a very low bitrate so it shows block noise when there's low contrast. I though it was just the file but I tried a different one that I knew was fine and it did the same thing. I reloaded the divx (4.x and 5.x) and 3ivx codecs to no avail. It's not just windows media player either, the blocks occur when I view the frames through tmpgenc. Any ideas?

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[Prospero424]

All I can think of is to make sure your Gamma, contrast, and brightness settings of your video drivers are set properly, especially the overlay adjustments if you are using an Ati card. I have seen these cause this, especially when the gamma is too high and the brightness way down.

I know it's a longshot, but it's all I could come up with


Prospero



EDIT: Hmmm weird. Are these files exhibiting the problem all of the same codec? If so, which one? You say that if you transcode the files to DivX using virtualdub, it solves the issue? If the file is already DivX, this doesn't make much sense unless the files (through some weird dimensional warp) all became corrupted.

If you would like, go ahead and send my a sample in email (2megs or less) my address is available in my profile.

One more thing, can you think of any changes whatsoever you have done to your 'puter in the last few days that could POSSIBLY affect video playback? Installed any video players, codecs, filters, even a game of some sort? Something had to change to cause this, if we can figure out what it was, maybe we can help some other people as well.

Prospero

[Aaron407]

Sorry, I messed up my reply, that was supposed to be under a different topic about xvid. Anyway (for this topic), the files encode properly and play good in the resulting mpeg format, so it seems to be some problem with playback and display of avi files only, not the actual decoding for transcoding to mpeg. I'm still stumped though.

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