16" MacBook Pro M1 Max displays video with alpha channel as black

Unfortunately, it only caught their attention. New update is out, same problem still persists. My machine is M1 Pro and I have written and spoken many times since the first day I bought it, unfortunately no solution has been found for such a long time. I have no faith that they will fix it.

I am having this issue as well. 2021 MBP 16", running 12.2.1. I was told by a vendor to update to "the latest version" and that seems to have been when the fun started. So I'm now wondering, reading all these comments, whether there may have been some sort of a regression in 12.2.1.

I can export a sequence in ProRes 4444 on my Intel Mac mini and it renders just fine, exactly as expected. If I try to render the same sequence on my MBP, there is no alpha and I get a black background where it's supposed to be transparent. The kicker (and the one I don't see people mentioning above) --> if I render the file on my Intel machine (where it plays correct), then move it over to my MBP, I get black instead of transparency again.

Anyone else still seeing this?

Same here. Projects rendered on Intel are perfect, but with the latest FCPX and Monterrey they are black. It is not just an export issue, files rendered in Intel and imported into M1 lose the alpha channel (aka is not properly identified/understood by the system). Really frustrating and amazed not so many people are complaining.

Hmm... seems resolved in FCPX, but alpha still not behaving correctly across the board. Alpha appears OK in FCPX now, but if I take a video file with a known good alpha channel (one rendered on an Intel machine) and try to view it in QuickView (select file in Finder, then hit spacebar), the alpha still renders as black. Similarly, if I take that same video, import it into FCPX and render it as a 4444, it will render properly. But once you try to view it in QuickView, the alpha still shows as black. This is the same behavior in 12.3.1 as in 12.2.1

Same behavior for me. QuickTime and QuickView do not display the video with alpha channel correctly, so that regression still exists. But they do appear to function correctly in all video editors now unlike previously, and even the ffmpeg encoder / decoder functions.

Well, let's bump this again. It's no big help if this works in the occasional program. I need ProRes 4444 with Alpha to just WORK. In it's intended function as an INTERMEDIATE in my workflow. It did on Intel. If there's some problem in the Hardware, unfixable… so be it - give me a working software solution!

OK, update.

Don't know why I haven't tested this yet, but:

If I start BM Fusion in Rosetta IT WORKS! ProRes4444 mov with alpha. Come on Apple, DO SOMETHING!

Edit:

The file works in Resolve 17.4.6, it works as input footage in BM Fusion under rosetta - but it doesn't work in Fusion native M1. Well. If the M2 Machines are out, can anybody confirm if the Problem ist a HW bug of the M1?

Well, I have a M1 Pro MBP, and have the same issue. Hardware? That would be really bad.

Please make them aware, that the M1 Pro has the same Issue.

Because the normal garden variety M1 doesn't have the ProRes/H264/H265 HW Codecs… that's where the problem seems to be.

Yep. Latest versions of Resolve and Fusion don't fix that problem either. This ist really frustration. It IS Apple's problem, I think.