I'm trying to finish a documentary and I was hoping to render it all in Vegas. It needs to be Prores (intermediate) and 8 channels of audio (preferably 24 bit). It has 5.1 mix files and a stereo mix. I can't seem to find a way to do that in with the available presets. Is it possible? Thanks

At this time I don't think it is possible with the the current implementation of their intermediate options. Perhaps once they obtain full official ProRes certification that should hopefully become an option.

I tried one work around, which for my particular situation worked well. I made a 6 channel wav file then an Intermediate render with its locked in two channel mix. I took these two renders into Virtual Dub (free-ware) and muxed the two files together without any decode / encode taking place. But like the Intermediate format itself, its still not officially ProRes certified, so testing with your delivery facility would be recommended.

Thanks, I figured as much. I think I'm going to turn over my Prores picture file and let the audio mixer combine them on his end as he can then double check and sign off on the lip sync. Thanks again for the help and suggestions. Appreciate it.

and let the audio mixer combine them on his end as he can then double

If an audio person is going to mix the project, I would export an AAF file which would have your audio timeline and include the picture locked ProRes with a stereo refernce track fro sync verification. ProTools and many other DAWs can open AAF, OMF and XML files.

@ddm Way I've done it is to render the Intermediate for a stereo mix, save as a project with a different name, change the Project Properties, audio tab, from Stereo to 5.1 Surround Bus, add audio tracks, do the surround mix, then render to a separate audio mix file and deliver them both. I think the surround options only show up in render templates if you select that as the audio bus in project properties. Just make sure the video starts and stays the same in both projects and the renders will sync. Can use Wave (Microsoft) for the audio file but Sony Wave64 gets you longer runtimes. I think the only possibility for a video render with multi-channel audio is one of the Windows video formats... Video for Windows is good if your target is making a dvd or Windows Media Audio v11 is slightly more recent. Both top out at 1080p.