Artifacts exporting in Premiere 2024 on PC only

Old thread, but recently ran into a version of this kind of glitch and wanted to share a possible fix -

Problem: Video file exports ok to ProRes, but exporting to h.264 (or transcoding from the good ProRes export to h.264) would result in video glitching similar to OP's image. Happened both directly out of Premiere and through Media Encoder.

Solution: Had to change from 2-pass to 1-pass encoding, and that fixed it. Alternative solution, if 2-pass encoding is a must, would be to use Handbrake (or your other transcoder of choice) to create an h.264 based off of a ProRes (or other all-i) export.

I hope this helps - the fix for me was changing the renderer to the Mercury OpenCl:

Hi,
I have the same problem for a few weeks. I tried everything that was written in this discussion. No effect. Additionally, after converting the file in Sony Catalyst, Adobe Premiere makes the same, unpleasant errors. In VLC, the video displays correctly. After converting to proxy, the video displays without error. However, when I want to render in full quality, the error we already know still appears.

Interesting development to this issue.... Randomly a co-worker tried rendering this problem file, and Media Encoder rendered the video perfectly. Nothing had been changed, and all files were in their original configuration (I had walked back all troubleshooting efforts). To be sure this stuck, I installed an NVIDIA GPU update, and did a restart. Now the problem is back....consistently the same as it was before 😞 

After having an Adobe tech work remotely through all the possible combinations on my comp the best option he came up with was to "render and replace" the trouble clip. He ran with the GoPro preset option which worked although it still doesn't explain why I was able to export out the exact same project with all the same settings a month ago with no artifacts.  

I too have been dealing with the exact same issues regarding artifacts on export. On A PC as well with everything updated. Rolled back Premiere and AME to the previous version where it seemed to work but doesn't anymore.  The software rendering option still causes issues but they are never in the same spots on the exports and it is ALWAYS on MXF files from a Sony FX6. I've exported other MXF files from the same camera over the past few years and didn't have this issue until the last update. I deleted all the render files as well although everything in the timeline plays as it should. I appreciate the help.

That is a graphics issue ... go to the Project panel dialog, change the GPU setting to Software Only, and see if it disappears. If so, there's your issue ...

Which GPU and what driver version are you using? If Nvidia, try updating to the most recent Studio driver, and using the "Clean install" options.

Is the media on your timeline an All-I codec? While it doesn't help diagnose your exact problem, a solution that should work would be to convert your raw/source media to ProRes or Cineform, and then replace your media on the timeline with that, then try exporting.

I've seen the inverse of your problem (Macs having this issue where PCs didn't) and more or less came to the conclusion that the machines we were using were underpowered. Converting the source media (less work for the computer to use all-I codecs) worked for me.

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

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