AME - Mixdown from 8 discrete channel .mpg file to stereo ProRes? Is it possible

[epdfilm]

I have a .mpg file with video and 8 discrete channels of audio that I'm trying to transcode to a stereo ProRes .mov file. I assumed in transcoding that the 8 discrete audio channels would be mixdown on the ProRes export BUT that is not the case. Please advise.

thx

[EckiAME · Accepted solution]

Should be also possible in AME. I just tested it with an 8ch MXF track transcoding into ProRes 422 MOV using the audio channelization. Result is a stereo ProRes. See attached screenshot.

[epdfilm]

Thanks, I did the same thing but some audio from 8 channel source still didn't come across. Adobe support said that my issue is a Quicktime issue.

[EckiAME]

That would qualify as a bug then. Would you be able to share some media? I can private message you with the instructions in this forum. What are your specs (OS, CPU, GPU, memory)?

[epdfilm]

Sorry, I wish that i could share but this is a work video file and I'm unable to do it.

2023 MBP 16" (M2), Sonoma 14.5, 32 gb RAM

Adobe Support said it couldn't be done and closed my case

[EckiAME]

I will look for 8-channel ProRes files and give it a try.

[EckiAME]

I used two different ProRes 422 files with an 8-channel layout on my MacBook Pro (2021, M1 Max, macOS 14.5) and converted them to QuickTime > ProRes 422 > stereo. Both examples worked well and did not show any weird effects, such as audio looping. For my testing, I used Adobe Media Encoder 24.4.0.46 and Adobe Media Encoder (Beta) 24.5.0.43.

So, which hardware or software produced your ProRes 422 8-channel files?