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P: Glitching playback, including green flashes, during playback and export of 10-bit 4:2:2 media on Windows

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We're receiving reports of customers in Premiere v26.5 having glitching issues, such as green flashes, during playback and exports.

The issue appears to be specific to media that is:

Long GOP
Recorded in the MXF container
10-bit 4:2:2
Recorded using a Canon camera, including the EOS R5 C, EOS C50, EOS C70, EOS C80, and EOS C400

If you are having this issue with a file that doesn’t match this description, we are eager to hear from you.

We are currently investigating with a top priority to fix this. For now, the temporary workaround is to roll back to v26.3.2. Apologies for any frustrations with this and appreciate your patience while we investigate.

Thanks!
Katie

Pinned Reply By Fergus H

Hi all,

We have identified the cause of this problem and fixed it. A patch for v26 that includes this fix will be available very soon, likely in less than one week.

The fix is also now in Premiere Beta v27.0, build 57 or higher. While we do not suggest customers use beta for production, it is safe to install the beta alongside v26 if you would like to test the fix yourself.

Some customers in this thread have said that rolling back to a version of Premiere v26.x before v26.5.x did not fix the problem - even with the older version, green flashing was still seen in the media. If you’re experiencing this, please hold down the shift key and launch Premiere. In the Reset options dialog that appear, check the box to clear the media cache.

Regards,

Fergus

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Desoto Studios

Participating Frequently

Thank you for the update, If I record in intra frame will i still get this issue?

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Amy the Stuv

Community Manager

@Desoto Studios, We don't have any reports of intraframe footage causing this issue as of now, but we are still investigating the cause. Feel free to shoot test footage and if you're willing to share it with us, we would appreciate it. I can DM you a private upload link to share with our engineers.

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Desoto Studios

Participating Frequently

I just did a test shot , Long op is definitely the issue, Intra frame seems to have no issues. I did two videos of the same item side by side and imported it into Premeire and instantly the longop glitched green every few seconds while the intra frame remained fine

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KatieToo

Author

Community Manager

Hi @IslandFox

Thanks for stopping by the Premiere forums and giving us those details about your playback/export issues on. I saw you were having issues on XF-AVC footage and mentioned canon c50 & c70. May we request a sample file for both your c50 and c70? Happy to DM you our Dropbox upload link for that.

I saw you mentioned as well down in comments that the issue fixed by rolling back your Nvidia drivers, could we get more specifics on the version/build driver you’re using and which helped?

@Piers27993239ra3u I saw you mentioned that issue particularly with mxf files shot on the Sony FX6, and working on 5 year old Dell laptop with Nvidia graphics/1 year old Asus NUC Performance (5070 mobile). May we request a sample file of your FX6 MXF for further troubleshooting? I’ll also DM you our Dropbox upload link for this.

It sounds as though you both might be using v26.5 Premiere as well, but just to confirm on a few details if you could:
1) Are you in v26.5 Premiere or if not, which version/build of Premiere you’re seeing this issue in?
2) Is this happening in all your projects, just some, or if you open new one with a few sample clips, is it still there? Reading the comments seems as though it is affecting other projects.
3) if using Mac let us know what kind and which macOS, or if PC, are you on win11/10 and what driver version and build?
4) Last working version of Premiere where playback/exports were behaving as expected?

I also wanted to make you aware of this Known Issue we’re tracking as this sounds somewhat familiar. See below:

The current temporary workaround is working in v26.3.2, and we’re still gathering user specs and details on what is working for them.

If you are indeed experiencing that same above issue, I’d like to merge this post there if that’s alright. Nothing will be lost, it just gets all the feedback in one spot for the engineers.

Hope to help!
Katie

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IslandFox

Known Participant

Yes the main issues were in 26.5. all projects. PC see attached specs.

Oddly, even after reverting I have been having select issues with some playback/ caching on some clips. I am getting a green screen which ive never seen before.

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Piers27993239ra3u

Participating Frequently

Can confirm rolling back to the previous version fixes the issue.

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IslandFox

Known Participant

I spoke too soon. It seems one of my video files is still acting weird. I might actually have to roll back the nvidia drivers. Going to try reinstall first.

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IslandFox

Known Participant

rolled back nvidia drivers and it fixed the remaining issues

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Piers27993239ra3u

Participating Frequently

Have the exact same issue. One on a 5 year old Dell laptop with Nvidia graphics, and one on a 1 year old Asus NUC Performance (5070 mobile). Started with the latest premiere pro update within the last few days

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IslandFox

Known Participant

Agreed. Weird thing is its only happening with one of my projects and It all contains footage shot from the same cameras. So not sure why its only the one file...

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Piers27993239ra3u

Participating Frequently

Same. Standard MP4 files play back fine in the same project but all the mxf files shot on the Sony FX6 won’t play back. Also exporting a video which contains those files takes about 30-60 times longer than usual. A 1m 45 seconds video is currently estimated to take 53 minutes to export and it’s just standard cuts and overlay

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IslandFox

Known Participant

unable to playback any xf-avc footage in my file. if i turn of hardware accelerated encoding the problem goes away but obviously I want to keep that setting on because its better. This happened when i updated my NVidia drivers and premiere so it could be either...

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brendonf

Participating Frequently

Convert back to v26.3.2 then upgrade to v26.5 again solve my green flickering screen issues.

EOS R5 MXF S-Log 10bit

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Desoto Studios

Participating Frequently

That doesnt work for me - Im a canon c80 user

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brendonf

Participating Frequently

Hi,

I was having issues on PC Premier version v26.5 where ever few frames were glitching and showing a green screen. After reading this forum I revered back to v26.3.2 (Build 2) now all frames are showing green.

Windows 11

GPU NVIDIA 5080 asus studio driver

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brendonf

Participating Frequently

As an update to this, after rolling back i decided to upgrade again to v26.5 and the green flickering frames have gone. Has anyone else found this? My project is only small, would be interested to know if somone with a larger project has the same experience?

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Irishoffspring

Participating Frequently

Currently experiencing the same issue… Attached video is using V26.3.2 (I hope premiere pro hasn’t destroyed my raw files somehow...)

Windows 11

GPU NVIDIA 5070

Cameras: Canon R5C, Canon C70 MXF files. Full green frames. I was on the latest update of premiere. When I opened my project, it was giving me errors for every single frame. Literally every frame was erroring and attempting to substitute frame. I deleted my render cache and attempted to relink all footage. Partially fixed the issue. No more substituting frames but that’s when the green frames were introduced - including errors in export. I also noticed it adjusted my color in a handful of clips. When I relinked those, it fixed the color, but the green frames remained.

Multiple drives and from older projects from years ago. I tested projects I had from over a year ago as well as the most current project I was working on on different external hard drives. Same issue - green frames scattered around.

Installed older version of premiere: v26.3.2 - footage is taking awhile to reload since my render cache is gone. However I had all green frames. After holding the playhead still on the timeline, eventually a frame will load. However I can’t play anything back without full green screen again.

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Premiere Pro_Green Frames Issue.mp4

Irishoffspring

Participating Frequently

Also like to add MOV footage from a DJI Air 2s and MP4 from a Canon R8 are working perfectly - no issues even though its in the same project.

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resourceful_Coconut5FAB

Participant

...

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Amy the Stuv

Community Manager

Hello @matthewfhenry

Welcome to the Premiere Forum and thank you for your Bug Report. I’m wondering if we could get more information on the file formats. Do you know what camera these are from, and could you include a screenshot of the Media file Properties? In fact, it could really help us to get samples of files presenting this problem in 26.5. Do you have a clip that had this issue you’d be willing to share with our engineering team? I could DM you a private upload link for it.

We truly appreciate you bringing this to our attention and giving us an indication of where this issue was introduced.

Best,

Amy

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matthewfhenry

Participant

Hi Amy,

I can’t really provide a clip unfortunately but I can give you details on the file format, camera, etc. The clip is of confidential information that isn’t intended to be publically viewable, otherwise I would be happy to share. The footate was recorded with a Canon C80.

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Amy the Stuv

Community Manager

Thank you, @matthewfhenry

We have had many reports of this so I will be merging this onto a main thread we will be using to track this issue. This will also make it easier to update everyone when there is a fix in the works.

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