mp4 h.264 artifacts with animation

Displaying 1 to 5 of 5 matches.
mbortolino
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Video downloadsMember is a contributor and has less than 250 Illustration downloadsExclusive
Posted Tue May 31, 2011 4:44PM

Hi, I'm preparing some work for video contributor application & trying to get 3d rendered animation to encode nicely in the requested mp4 h.264 format. I can't seem to get rid of blocky artifacts on red areas, even with the highest quality settings in compressed mp4 or mov files unless i use the 'animation' option for mov format, which gives very large file sizes but solves the aliased reds.


Here's a comparison, h.264 mp4 first & animation mov at the bottom. In both cases settings are at their highest quality:


kGkQf


Does anyone know if it's ok to submit this high quality .mov format instead of mp4? & is there a solution to the aliased reds?


Thanks
Forrestbro
Member is a Bronze contributor and has 250 - 2,499 Photo downloadsMember is a Diamond contributor and has 12,500 - 99,999 Video downloadsExclusiveExclusive iStockphoto VideographerMember has had a File Of The Week
Posted Tue May 31, 2011 5:11PM
You might want to check that your data rate setting is high enough. But the quality for the application is not that important. It's more to show that you have some video talent.

Once you get accepted, uploads are compressed with PhotoJPEG.
mbortolino
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Video downloadsMember is a contributor and has less than 250 Illustration downloadsExclusive
Posted Wed Jun 1, 2011 4:00AM

The data rate didn't have any effect on the aliased reds, even with huge 10k+ rates.


& the blockiness remains with photojpeg. Here's an example still from a quicktime mov with photojpeg at highest quality settings:


2pss1
Daedalum
Member is a Silver contributor and has 1,250 - 4,999 Video downloadsExclusive iStockphoto VideographerMember has had a File Of The Week
Posted Wed Jun 1, 2011 4:35AM
that looks like DV ( sideways squashed) pixel altering,,, are you sure its set to square pixel and right dimensions?
mbortolino
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Video downloadsMember is a contributor and has less than 250 Illustration downloadsExclusive
Posted Wed Jun 1, 2011 4:59AM
yes square pixels & the output dimensions are same as source (which was a tga sequence rendered from the 3d app).
This thread has been locked.
Displaying 1 to 5 of 5 matches.
Not a member?Join
Cart (0)