Prores 444 + Alpha Channel in MediaEncoder

Gio

Hi. I want video with alpha channel in Prores codec in Media Encoder, but nothing happening. Video renders with black background not transparent. Can someone explain, what am I doing wrong?

Here my configuration:

Vouk

You're not doing anything wrong. Alpha channel support is still on my TODO-list.

Gio

Thank you for your answer!

Gio

Hello! I'm just interested, what about your TODO list and alpha channel position in it?)

Vouk

Thanks for reminding me.

Can you please try the premiere connector 1.2.0 and tell me if it works?

You have to choose a pixel format with an alpha channel to enable this (like you showed correctly in your screenshot above).

https://github.com/Vouk/voukoder-connectors

Gio

Sad but it didn't work for me

On the left what it should be, on the right what it looks like (alpha channel/transparency don't work)

I tried settings from the screenshot in my first comment, also tried different options with 8 bit alpha and 4444 XQ it didn't work either.

Vouk

It worked for me.

I created a MOV/prores file with default settings:

And imported it again with transparent background:

Gio

Strange, I tried again with default settings from your first screenshot, but nothing changed.

Same situation with another simple video i created.

Vouk

Please be aware, that you can't just test for transparency by playing it with MPC-HC or any other player. You need to import it in a project again. In MPC-HC the transparent video looked faulty to me too.

Gio

Nope, I also tried the same as you did on yours second screenshot. Maybe my problem is, cause I use older version of the Premier Pro.

Vouk

Are you using Connector 1.2.0 and Voukoder 3?

Gio

Yes, also reinstall them couple times, thought it might help.

Gio

Hello again. I just want to say, that on newer versions of the Voukoder 4.1 and the Premiere Connector 1.2.2

I still don't get Alpha Channel on the Prores 444/442. I thought maybe you'll be interested in log file.

Vouk

Found the issue. You don't get any alpha channel information because the connector you're using does not supply any alpha information:

Zitat

[19:47:31] FFmpeg: w:3840 h:2160 fmt:yuv444p16le sar:1/1 -> w:3840 h:2160 fmt:yuva444p10le sar:1/1 flags:0x2

For some time now the connectors provide a different format:

Zitat

[09:57:46] FFmpeg: w:1920 h:1080 fmt:ayuv64le sar:1/1 -> w:1920 h:1080 fmt:yuva444p10le sar:1/1 flags:0x2

So it seems you are still using a very old connector, even if you have installed the latest one. Please perform these steps:

Uninstall all premiere connectors from the control panel (Apps & Features)
Manually delete all Voukoder.prm and VoukoderR2.prm files from these folders (and its subfolders):
1. C:\Program Files\Adobe\Adobe Premiere Pro 2020\Plug-Ins\Common (Replace the version/year numbers)
2. C:\Program Files\Adobe\Common\Plug-ins\7.0\MediaCore
There should be no Voukoder.prm or VoukoderR2.prm left on your system anymore
Install the latest premiere connector again.

This should help.

Gio

Thank you! Sadly enough, nothing helped me. I even reinstalled premier pro, the program is still showing yuv444p16le in log.

Also it's continue to show Voukoder not Voukoder R2, like on your previous screenshots here.

I'm planning to reinstall Windows in near future, maybe it will help.

Vouk

Please try connector version 1.2.4. It seems your processor is not capable of the AVX/2 instruction set and I had to make a little change for this path.

Gio

OMG! Thank you! It works! It still shows "Voukoder" and also yuv444p16le, but works!

Big Thanks!!!

Also I attached Log File if you interested:

Vouk

Take a closer look

it is yuva444p16le

Gio

YES! You're a magician! Marvelous!

Thank YOU!

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