Glitch on 4K footage in 1080p sequence

Forum|Forum|6 years ago
October 15, 2019
12 replies
3029 views

I have 4k footage shot on an alexa mini that plays fine in VLC or a sequence that matches the clip's settings. Once it's rendered in a 1080p DNxHD sequence a strange glitch appears over the vertical bars of a balcony railing during playback of each zoom shot. I'm using the 4K footage to zoom in further on some of the shots.

You can see a sample here: https://vimeo.com/366054599/ded9632c4d. The glitch is in the balcony railing to the left of center.

I was editing the footage in a DNxHD sequence on a windows machine with Premiere 2019, and now I'm finishing it on an iMac Pro with Premiere 2019. I also tried it in ProRes 4444 and 422 sequences. The same problem appears in all cases.

Any guidance would be much appreciated!

Footage:
Apple Pro Res 4444 / 3840 x 2160

Sequence:
DNX RGB 444 1080p 25 / square pixel

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jasontcox

Inspiring

Have you tried disabling GPU acceleration (under File - Project Settings - General). I know that's annoying, but I want to rule out a GPU issue.

A

andandrewrewAuthor

Known Participant

Yes, I have. Thank you.

B

Byron Cortez

Community Expert

Did you left active "Use Maximun Render Quality" checkbox in Export Settings window when you exports? This option is for a best process in render when you are scaled clips or stills.

Byron.