KVCD: macroblock Problems with new templates
 

Hi Kwag

For the most part the quality is great , but what is happening when a slow scene is being shown macroblocks start to appear and if the camera starts to pan its like a wet paint streak forms and it stays the colour from the original macroblock.

This does not happen at all when played from the mpg file through media player, but does in PowerDVD and worse when its cut to a CDR in power DVD or WinDVD (played through a Pioneer 16x - Liteon 24x10x40 - Teac 40x)

When playing it on mine or a mates standalone player instead of the streaking effect they are just plain white macroblocks that appear, as if there is no data being displayed.

I have tried this now on a few movies with the previous templates and the new ones just to make sure it was not a hardware fault i may have, but the original templates work fine.

Something for you to puzzle over :roll:

missing info :oops:

These are PAL and tried at 352x576 and 352x288 <-- this one being slightly better.

New Template problems
 

Kwag,

I went back to the original template. In certain scenes the Video would be slower than the audio. It's as if the Video gets stuck and the audio keeps going then it catches up. This happens in panning and some fast action scenes. I did the same movie with last template prior to your most recent updates and It played great.

Re: New Template problems
 

Then change the audio back to "Joint Stereo", or "Stereo".

There shouldn't be any difference, other than that, as far as audio is concerned.

As far as the video, the main difference is that CQ is now 80, instead of 70. And the GOP is 6 I frames longer.

This shouldn't make a difference as far as compatibility from the old template.

kwag

Re: Problems with new templates
 

Hi Pnumonic:

Please double check your settings. I have personally done 3 movies already with the new temlpate, and the results are far above better than the old template.

I'm also getting E-Mail reports, too many to handle in a quick response time!, also positive in results.

I don't understand how you can see macro blocks on slow scenes, because the quality is better in the new template. Only in extremely high speed scenes, where there's not enough bit rate for the data bandwidth, TMPEG would generate a high Q and only if you do a "Pause" on your DVD player, you might see some un-aligned macro blocks.

Are you sure that you didn't increase the TemporalSmoother filter too high?, if you user an AviSynth script.

Because what you describe as a "Wet paint streak", is exactly what would happen if you use a high value in TemporalSmoother.

kwag

I'm testing the new template now and so far it looks pretty good but haven't yet tried it on the home player. However, I have been using cq80 for quite a while now using the template before this one and have been getting near dvd quality even though I have to split the movie to 2 disks. The only thing I changed was in tmpg/quantize matrix I select output YUV data as basic YCbCr to make the black colors smoother.