More than just 5.1 audio export

[jeffr68402967]

For PrAudioChannelType, there is only:

	kPrAudioChannelType_Mono = 1,
	kPrAudioChannelType_Stereo = 2,
	kPrAudioChannelType_51 = 3,

defined.  How do I export 7.1 audio?  How do I get arbitrary tracks out?  If they had 24 tracks, say.  How to get the number of tracks and how to get each one without the matching channeltype in MakeAudioRenderer()?

[Zac Lam · Accepted solution]

Hi Jeff,

First you'd need to set up a sequence so that the master audio track is multichannel:

http://blogs.adobe.com/VideoRoad/2015/02/multichannel-audio-in-premiere-pro.html

Then, in an exporter, use the latest version of the Sequence Audio Suite (currently that's version 2, added in CC 2015).  The MakeAudioRenderer() call takes an inNumChannels value, and a PrAudioChannelLabel parameter.  So if the exporter parameter UI shows a 7.1 option, and the user selects that, then set inNumChannels = 8 and pass in the same sized array of PrAudioChannelLabels.

Regards,

Zac

[jeffr68402967]

> MakeAudioRenderer() call takes an inNumChannels value, and a PrAudioChannelLabel parameter

Can I use this for stereo and 5.1 too, then, so there is only one code path?

> PrAudioChannelLabels

What are the labels?  Are those input or output parameters?

[Zac Lam]

Yes, you can use it for stereo and 5.1 too.

The labels are input parameters.

[jeffr68402967]

> The labels are input parameters.

So, "Front Left", "Front Right", etc?  Is there a way to query the names, if I don't care and just want the linear order of the tracks in the master Multichannel track?

[jeffr68402967]

Oh, also, is there a way to get the count of tracks in the master multichannel track, so I can offer a reasonable default?

Thanks much!

[Zac Lam]

Yes, you can call PrSDKExportInfoSuite->GetExportSourceInfo() with kExportInfo_NumAudioChannels

I don't think there is a query for the names.

[jeffr68402967]

> I don't think there is a query for the names.

How do I get them then?  Do I have to ask the user to supply matching names for the up-to 32 input channels???

[jeffr68402967]

> The PrAudioChannelLabels are input parameters.

Are there numeric input channel labels?  I just want to be able to export up to the 32-bit tracks that they might have in a sequence - the ones beyond 7.1 could be anything?  Or are the label names in the audiochannellabel enum in audio track order?  Basically, say they have 32-audio channels, how do I pull all of those out?

[jeffr68402967]

It looks like if I pass an array of 32 values of kPrAudioChannelLabel_Discrete, I get the 32 individual channels - is this correct?