GLITCHY FRAMES throughout whole project timeline, even on exported videos.

[WONDR Media]

When working on a sports video for a client, I keep getting these glitched frames throughout the project. It happens everytime a camera flash happens on the footage. All the frames leading up to the flash are fine, but as soon as the flash happens, the glitch shows and it ruins the video product. And this is only happening in Premiere Pro. When I view the footage outside of Priemere, no glitches.

For reference, I am working on:

2022 Mac Studio M1 Max (Sequoia 15.6.1)

Premiere Pro Version 25.5

I have tried everything I could think of, from deleting cache file, to transcoding the footage to Apple Pro Res 422, changing the sequences frame rate. Still no solution.

I've attached some photos and a recording to show the issue. Hope someone can help, as this is causing issues for my company.

[IanB_360]

Hi @WONDR Media 

Welcome to the Premiere Pro Forum community. Thank you for taking the time to report a problem. It would help us if you could use the link here, How to Report a Problem, which has steps to provide more information that can help us identify the issue. Does this happen only with certain videos, or is it every video you have in a project? Can you send me a direct message with a link to the file you use in the videos causing this error? We can look at it better and see what is causing the pixelation. 

Here to help.

Ian

[WONDR Media]

Thanks @IanB_360 ,

Just sent over a DM.

[WONDR Media]

Can anyone else help with this? @IanB_360 hasn't responded in a few days.

[Stan Jones]

@WONDR Media,

I also see the glitch, exactly one frame, in VLC media player.

In PR, I just cut out the one frame. It is such a quick clip, I didn't see any difference - just no glitch.

The clip is variable frame rate, but I don't know that it mattered.

Anyone have any suggestions on this? I'll have to try shooting a bit of video with a flash going off!

Stan

[IanB_360]

Hi @WONDR Media 
I have not been able to reproduce this yet. Are there any filters or effects on the clips? Is this sequence composed solely of the clips themselves? I sent a message with the screen grabs at the time you sent me, and it has been hard to find a pixelated artifact frame like you showed. 
Here to help
Ian

[Stan Jones]

@IanB_360,

As I said in my post, I saw it in VLC and in PR.

New sequence from clip. Frame 36.

Stan

[IanB_360]

Hi @WONDR Media 
Thank you for sending the project! That helped solve this little dilemma you have been facing. I sent you a direct message with more info.
The key point is that the clips in the project are not suitable for using speed/duration of 112% and the time interpolation "Optical Flow".
You will find that switching the time interpolation to "Frame Sampling" yields a better result. 
I have added a screen grab of the settings for the clip speed/duration tab.
Your exports after switching those settings will give you the result you are looking for. Check any clips using Optical Flow and adjust the settings to "Frame Sampling"; that alone will yield much better results in your sequences. 
Here to help
Ian

[WONDR Media]

@IanB_360 This solved the issue we were having. Thank you Ian!