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Proxy multichannel audio doesn't include all audio + bogus waveform

Forum|Forum|4 years ago
March 11, 2021
3 replies
6757 views

Premiere Pro 15.0

macOS 10.15.6

I created a custom ingest preset for my Sony FX6 - 8 channels mapped to 8 mono tracks - but this is not working as it should:

1) As you can see from the waveforms; the master files various audio channels have not been transfered to the proxy file. Not that you can trust the waveform, because the waveform indicates that all 8 proxy-channels have been filled with channel 1 from the master file, but in reality...

2) ... I only have sound on the first proxy-channel - the seven remaing channels are, despite the lovely waveform, mute.

???

This topic has been closed for replies.

Correct answer Richard M Knight

Sorry for the delay in replying, I have never used the Proxy workflow and I needed a couple of days to see how it works. Making new ingest presets is not the easiest, it should be more straight forward. Having said that I created a Prores proxy with 8 audio channels and I had the same problem as you, the audio was not mapped correctly. This was with the ProRes 422 Proxy. I then had a look at other codec options and I found this one seemed to work:

Your original footage

Proxy version

R

Richard M Knight

Correct answer

Community Expert

Sorry for the delay in replying, I have never used the Proxy workflow and I needed a couple of days to see how it works. Making new ingest presets is not the easiest, it should be more straight forward. Having said that I created a Prores proxy with 8 audio channels and I had the same problem as you, the audio was not mapped correctly. This was with the ProRes 422 Proxy. I then had a look at other codec options and I found this one seemed to work:

Your original footage

Proxy version

R Neil Haugen

Legend

Interesting, Richard. The audio between t-code or proxy processes can be painful to sort out.

Neil

Everyone's mileage always varies ...

M

Michael Grenadier

Legend

I have never been able to create functioning proxies with sony fx7 material and this sounds like the problem you're experiencing. Seems to be an issue with the way the 8 channels of audio are configured, but I did figure out a workaround. Create the proxies but rather than use them as proxies, select your camera original in premiere and "make offline" and the connect them to the proxies. Then when you're ready to output, make the clips offline in premiere and reconnect to the camera original. works just fine although not as elegant as the full proxy workflow.

Richard, thanks for the solution. Next time I'm presented with this sort of camera original, I'll give it a shot.

R

Richard M Knight

Community Expert

Would it be possible for you to Dropbox a short sample of the 8 track original?

pettermAuthor

Participating Frequently

As it so happens I have an amazing 4 second clip perfect for this situation 🙂

https://www.dropbox.com/s/5b03hgtwebwo04w/20210309_Zinus_int_Ronny_1.MXF?dl=0

A shotgun mic is connected to channel 1, a lapel mic to channel 2, and channels 3&4 are the internal mics.
And the language in question is Norwegian.

neil wilkes

Legend

You don't give us any details about your project, it's sequence setup, your audio hardware & how everything is set up & mapped in your system so I have to ask - is this a question about something, please, or a point, or a bug report or what?

pettermAuthor

Participating Frequently

For me the three question marks kinda give away the fact that I don't understand what's going on, but based on your tone I'm guessing you’re tired of people not understanding their own issues? In that case I'm sorry, because at the moment I don't know if this is a bug report or not. But I'd prefer it to be lack of knowledge on my part, because then I can find out what's wrong and fix it. With your kind help, of course 🙂

The reason I didn't include any setup information was I didn't think my problem related to that kind of information beyond what I already wrote regarding the audio channels. Again, sorry.

MXF wrapper: H264 MPEG-4 XAVC-I 3840x2160 25fps, with 8-channels of audio.

The sequence in Premiere was created using new sequence from clip, so that shouldn't be a problem. But maybe it is?

My audio hardware is a Universal Audio Apollo Twin interface.

How everything is set up and mapped beyond me choosing my interface as my default input/output I don’t know - I don’t speak tech, hence this post.

As mentioned the Sony FX6 has 8 audio channels, so my previous proxy ingests don't work (I got the famous “matching audio channels” error). I created a new Apple ProRes Proxy ingest; 8 mono channels with the various source channels set up:

And there you have it. The result is as described above;

Only channel 1 from the source files is transfered to the proxy files while cannels 2-8 are discarded. The waveform however indicates that all 8 proxy-channels have audio (but only from channel 1), but they are in fact dead quiet.

So – is this a bug? Is it me?

Any help is appreciated! 🙂

neil wilkes

Legend

I'm still trying to understand the project so please bear with me.

Are the 8 tracks on the source separate source material - along the lines of Dialogue, M&E, SFX etc, or are they final mixes configured in a similar way to the old-style DTRS tapes - Left, Right, Centre, LFE, Left Rear, Right Rear, M&E Left, M&E Right (or sometimes Stereo left/right for channels 7/8).

So are we talking a project that needs the audio to still be mixed, or a set of completed mixes already in sync?

Also, what is the project's purpose - it's end result? Do you need stereo or surround? I suspect I am probably reading too much into the 8-channel audio here simply because it sounds so similar to DTRS whereas it may well be that what you have on the source is not necessarily containing 8 separate audio mmixes - I have seen transfers sent to me that supposedly have 4 channels of audio but closer examination revealed one mix printed twice, for some reason. Is there any documentation with the source material, and what's your brief for the project?

I ask because this will have a definite bearing on how to set up an Audio template you will later be able to recall and adapt for other content.

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