Red color as MC MPEG2 looks blocky

dmcmeans wrote on 4/18/2003, 11:30 AM

I rendered some Easter Canata footage that had Roman soldiers with their bright red capes and plumes in it over the weeked.

I used the Main Concept MPEG-2 template, DVD NTSC. I moved the quality up to 31 and set the data rate to 6M, 4M, and 192K, and checked the separate streams box.

The bright red colors of the Roman uniforms looks blocky, pixellated, in the resulting .m2v file.

I tried using the Conservative Broadcast Colors filter, which did clean up the brightness of the reds, but didn't help the blockiness in the m2v file any.

Anyone know what's going on here?

David

Comments

SonyEPM wrote on 4/18/2003, 1:13 PM
Do you have 4.0b?

Are you seeing these blocks during DVD disc playback or is this software playback?
MCTech wrote on 4/18/2003, 1:14 PM
Are you seeing this on an LCD monitor, by chance?

Mark
MainConcept
dmcmeans wrote on 4/18/2003, 4:37 PM
It is noticeable when played back on the PC, and detectable when played back on the DVD player connected to the TV.
dmcmeans wrote on 4/18/2003, 4:39 PM
Nope. CRT. I can see the blockiness on the PC and on the DVD player attached to the TV.

You are implying that I should not be seeing any blockiness of the reds, yes?

May I post a sample project that illustrates what I'm seeing?
Musha wrote on 4/19/2003, 1:59 PM
Hey, I had the same problem with the red color! The image has been created in Photoshop, then saved as png file, imported to a separate video track... Rendered to an uncompressed avi it looks good, but as MC MPEG 2 it is blocky indeed! To avoid possible missunderstandings between Photoshop & Vegas, I tried to use generated text media (red color again) and the red text looked pretty bad when compressed to mpeg2...

Mark, any suggestions?
Thanks!
dmcmeans wrote on 4/22/2003, 12:42 PM
Had 4.0.

Applying the 4.0b update corrected the red blockiness.

However, now the quality doesn't seem to be as crisp. Using the DVD NTSC template, but set VBR to 6M, 4M, 192K, and with separate streams.

Under 4.0, the mpeg looked very smooth. Under 4.0b, it looks a little "shimmery".

Will do more investigation.

David