User level: Level 1 (19 points)Since the latest update Compressor doesn't render alpha 4444 image sequences.
How do I revert to an older version.
Allready tried all the suggestions to reboot and fix it but to no avail.
Posted on Nov 17, 2025 7:30 AM
User level: Level 6 (14,029 points)Nov 17, 2025 8:36 AM in response to Alain Boisvert
Just tested with 14.11.1 and it works great for me.
Took a 10 second Motion project with a white box moving and resizing, exported as PNG image sequence.
In Compressor applied the "QuickTime ProRes with Alpha" preset.
Resulting .mov works as expected in FCP.
Can you tell us exactly what you're doing in Compressor?
Did you run the Repair function inside Compressor?
User level: Level 9 (77,942 points)Nov 17, 2025 8:18 AM in response to Alain Boisvert
Which version of Compressor? 4.11?
Which version of macOS? Sequoia 15.6? Tahoe 26.1? What?
Where does the material in question come from? FCP? Somewhere else?
Are you sure the source material does have transparency?
Would it be possible to share a sample source file so we can test?
User level: Level 1 (19 points)Nov 17, 2025 8:47 AM in response to BenB
Well I haven't change anything in my workflow.
Open Compressor.
Open IMG sequence.
Choose Prores with alpha Codec.
Render and...fails.
Wait...I just tried with an older folder of PNG's and it works.
I will test something out...report soon.
User level: Level 1 (19 points)Nov 17, 2025 8:25 AM in response to Luis Sequeira1
Compressor 4.11.1 latest
Sequoia 15.6.1
It is a folder with PNG's inside. Yes they have transparency.
Here are 1 of them. You can duplicate it 24 times. It will be static but should be transparent.
Worked fine before update ! My fault for not saving my older version Compressor !!!
I need the alpha and it just won't export. 3x can not encode error.
Thanks.
User level: Level 6 (14,029 points)Nov 17, 2025 8:56 AM in response to Alain Boisvert
I just tested with the image you provided, and it works fine for me.
User level: Level 9 (77,942 points)Nov 17, 2025 9:04 AM in response to BenB
BenB wrote:
I just tested with the image you provided, and it works fine for me.
+1
User level: Level 1 (19 points)Nov 17, 2025 9:39 AM in response to Alain Boisvert
Problem is related to one specific folder. So it looks like Compressor is fine.
Thank you for your comments.
User level: Level 1 (19 points)Nov 17, 2025 8:35 AM in response to Luis Sequeira1
I also just tried importing into FC.
I can export the image sequence with the alpha. Sort of a...not useful workaround.
It not quick.
So the alpha codec works inside FC but not with compressor.
Originally posted at discussions.apple.com/thread/256190693