Audio channels duplicated when adding TC track and re-timing

New Here ,
Mar 02, 2018 Mar 02, 2018

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I'm getting a very strange issue when re-timing some content and adding TC through AME.

My current workflow is:

  1. Add HD ProRes 422 HQ 23.98fps file with no TC and 8chs audio (1-6 - 5.1, 7-8 - 2.0) to Media encoder
  2. Interpret the footage as 25fps
  3. Add my custom preset which adds a TC track (not BITC) and exports as is (ProRes 422 HQ, 25fps, 8chs audio)

Within the preset the audio is set up as 8 streams of mono audio (each mapped to the correct source channel) but on the outputted file the 2nd channel of audio (in this case the front right of the 5.1) gets duplicated across channels 3-8. The audio of the source file is 8 individual tracks - but if I use a source where chs 1-6 are separate tracks but chs 7-8 are a stereo pair then the outputted file has channel 2 duplicated across chs 3-6 and the stereo pair is taken across correctly.

This issue only occurs when I add TC and interpret the footage as 25fps simultaneously. I've run test files through where I only do one or the other and don't get any issues.

I'm using Media Encoder CC version 12.0.1 (build 64)

Can anyone tell me why this is happening and how I can resolve it?

Thanks,
Ash

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