DNxHD Render Error - Win 7 - PPro CS6

C

Chris Adler

Veteran
So I'm running into a problem. I have transcoded a fair amount of my MTS footage (GH2) to DNxHD. I find that when I render (in Premiere Pro CS6) that footage out regardless of target codec my super whites render with an odd blue and purple pixelation. So, the brightest portion of exterior sky shots, etc. will render with the bizarre blocking.

Anyone run into this before? Some of the footage was converted to DNxHD from MTS using 5D2RGB and some was rendered to DNxHD from After Effects. I've tried both options regarding the color space, but it doesn't seem to matter.

The footage when played back in Premiere doesn't display the pixelation. It only appears in the rendered footage.
 
I just discovered the artifacts only render when I check the "Use Maximum Bit Depth" check box and "Maximum Quality" check box.
 
Okay, more details. It only renders the artifacts when USE MAXIMUM BIT DEPTH is checked. I can render with maximum quality, but if I choose the bit depth box then it appears that the pure white pixels get screwed up and the purple and blue blocks appear. I can at least avoid the problem by unchecking the box, but does anyone have a clue why it's happening? Just a bug?
 
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