[Michael Sacci] “But the real question is what do you mean by “Pulsating?” Do you have a field order issue? “
I think I might know what he’s describing. I’ve seen this myself once or twice, and I’ve occasionally heard similar complaints from others. Occasionally, depending on the footage, Compressor’s MPEG-2 output can have regularly repeating, visible blocking artifacts on a single frame about every 15 frames or so (probably coinciding with the closed GOP structure). I think “pulsating” is how some people describe the regular pattern of blocking.
I’m not sure if this only occurs only in VBR encodes, but some things to try would be:
1. Use CBR encoding instead of VBR
2. Select open (vs. closed) GOP structure in the Encoder pane of the Inspector tab. If you’re encoding assets for multi-angle content, a closed GOP structure is necessary.
I don’t really run into this issue myself, as I use BitVice and not Compressor, but I have seen this before. I’m not sure what causes it, but it’s definitely real.