Scaling Aspect Ratio Bug
Latest upgrade is causing my 4K 4096x2160 25p when placed on a 1440x1080 25fps timeline (keep existing settings) and reduced to 50% scale to squeeze to 4:3 aspect. However, if I scale to 51% it holds it's 16:9 aspect.
NB: The 1440x1080 frame holds it's 16:9 aspect, it is only the clip which squeezes to 4:3 losing it's uniformity. This is not just a playback issue it carries over to export leaving black bars on either side of the vision.
Current and least ridiculous workaround - 'Scale to Frame Size' and increase clip size to around 107% to avoid letterboxing.
You can also change the Mercury Playback Engine to 'Software Only', but editing 4K in this mode is arduous.
What has changed in the upgrade and how can I remedy this issue?
Premiere Pro 14.4.0 (Build 38)
Mac OS Catalina 10.15.7
MacBook Pro (15-inch, 2019)
2.3GHz 8-Core Intel Core i9
32 GB 2400 MHz DDR4
Radeon Pro Vega 20 4GB
Intel UHD Graphics 630 1536 MB
Antoine Autokroma commented
Darren could you upload a faulty footage for us ? Thanks
Darren Manden commented
We're seeing this with Amira anamorphic footage (3840x2160 in a 1920x1080 timeline). As soon as the footage is scaled to where it no longer fills the screen vertically, the footage is squeezed. The only workaround we have found is to use non-uniform scaling in the motion tab, but that's far less than ideal.
As always, I am happy to share more information with anyone from Adobe on this.
Joel Rose commented
This isn't limited to 4k video. I have a simple png file that I'm trying to reduce below 50% and do a simple animation to make it increase in size. The moment I change scale below 50%, it squishes the image. Even if I scale the width and height independently, it still has the issue.
Jason Conduit commented
The below thread appears to highlight the same problem.
Stanley Jones commented
See this forum thread that Jason started:
I confirmed the problem on PC Win10, PR 14.4.0 with UHD material. Created HDV 1440x1080 sequence and used 3840x2160 video.