Black background appears when playing transparent video (Apple ProRes 4444 with alpha)

Hello,

Everything was working perfectly until last week. Now, when I'm playing the presentation, all the videos with alpha are displaying with a black background. Is this something related to the last update?

Posted on Sep 25, 2023 5:25 AM

Similar questions

FCP 12 has alpha channel problem? In this latest Creator Studio version of FCP, I'm having issue with alpha videos that I mostly use for transitions. The problem is, the area where it should be transparent, it's showing black. I tried different video clips like Prores 4444 Alpha, Photo JPEG - all having same issues. Anyone has same problem? I'm using Mac Mini M4 with Tahoe.
289 5
Why does half my video clip go black when I add a Title Motion Blur to it? I have downloaded numerous Motion Titles, and for some reason everytime I add the layer to my timeline half the selected clip goes black.... I have tried restarting the computer, 4-5 different Motion Blur Titles, Different clips, Different projects, and it still the problem stays the same. It’s not that this is happening on my first project itself. It was working just fine a few days back with vertical timeline and footage’s. Almost everything is same but the problem suddenly popped up this time. I’ve also updated both my FCP & Mac OS to the latest one just to be sure about any bugs. What else can I do? Please help!
509 6
Keynote will not handle video properly with Alpha channel I'm adding a video with Alpha channel to my Keynote presentations. However, the transparency is not displayed; instead, the background turns white. They work when i play them in preview mode. I'm getting a message "This movie may not play on iPhone or iPad." When I toggle the optimization it still doesn't work. My old Alpha videos are also broken. I'm rendering them in as usual in Pro4444 Any ideas?
658 1

2 replies

Noblett

Level 1

42 points

Sep 28, 2023 12:39 PM in response to elizapa88

Yep, two intel based MBPS. Both showing alpha as black. I spoke with Apple, was advised to roll back my OS so I could install an older version of Keynote. It fixed it, but when I update to Keynote 13.2 it breaks again. Annoyingly, I can't install 13.1, just 12.x if I roll back to Monterrey.

Sep 25, 2023 8:20 AM in response to elizapa88

Yes, tell Apple about it here: Feedback - Keynote - Apple

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Black background appears when playing transparent video (Apple ProRes 4444 with alpha)

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up