How are you judging the footage? If you are opening the interlaced footage in AE then the MXF files are probably not being interpreted with Separated Fields and the Pro REZ files are. Check file interpretation of the MXF files and make sure the fields are being separated in AE in the proper order. You can quickly see the interpretation in the info panel at the top of the Project Panel when the footage is selected. Jaggy edges on interlaced files are normal unless you tell the software to fix them by separating fields. The more movement in the frame the worse the jaggies.
Thanks for your answer. I'm judging them on a Broadcast Monitor that is hooked up to my editing station via an AJA Video Card. In my example above, you can clearly see, that the jagged edges are only in the red color, not the other ones. I think it has something to do with the MXF Wrapper.
Are you previewing an AE comp? Did you separate fields? A broadcast monitor is not going to separate fields and the only true judgement of quality, especially with interlaced files is when they are playing back at full frame rate, full resolution and 100% magnification ratio.
I preview the file in Premiere at 100%, full res and full frame rate. I'm aware of most of the interlace issues because I work as a broadcast editor and motion designer for more than 10 years. But this is something new to me. It's not a normal interlace issues because it only affects the red color and not the other ones.
There may be some new problems with the compression of the MXF files when you render interlaced. What do the files look like with you render them progressive? The only difference between a progressive file and an interlaced file when the footage is played back on an interlaced system is that the progressive file has two fields that are identical slices in time making up each frame and the interlaced file has two fields that are different slices in time making up each frame. There could also be a problem with the way your AJA card is displaying interlaced files. Are the screen captures from the computer monitor or your broadcast monitor?
This definitely looks like interlacing from a freeze frame with separate fields turned off.
There are fewer artifacts in the red when there is a yellow background. This magnified closeup of the Pro-Rez shows no interlacing artifacts:
There are a couple of things that I would try. The easiest and first option would be to render an MXF file progressive, then re-render the same file as interlaced. See if that fixes the problem. The only thing that can possibly effect in playback is the way motion looks when the movement is at or near critical panning speeds. The second thing I would try is slightly changing the color values. Your red is 224, 0, 10, your black is 0, 0, 0. The yellow is 254, 218, 0.
Compressing any fully saturated color against a black background that is 0, 0, 0 is almost always going to cause problems. Introducing a bit of noise in the black background or raising the values slightly will help. Notice how much cleaner the red is against the yellow. if the yellow was brought down just a bit or even had 4 or 5 points of blue added you may get a clean render. If the red had a bit of blue in it that would also help. Bringing the black value up to 5, 5, 5 or 10, 10, 10 would also help. There would be some room for the compression to make calculations when it is dealing with the edges.
I hope this helps. I've never seen an interlaced video system that couldn't playback progressive footage without problems but I'll acknowledge that there may be new compression problems with the MXF format that are giving you these nasty interlacing issues.