I have been working on a workflow for a two camera green screen shoot done with a Sony F5 and Sony A7s camera. I shot the interviews both in 4K for the F5 and UHD for the A7s
Problems I encountered where;
A7s XAVC s has no AMA plug-in for Avid. Have to transcode footage in DaVinci Resolve before linking in Avid.
Difficult to key UHD 4:2:0 A7s footage in Avid using SpectraMatt, After Effects new Keylight nails it.
The workflow sort of falls apart at the end when I have to manually reassemble the time line using the linked keyed footage from After Effects.
2 cameras F5 and A7s both green-screen backgrounds
Transcode the A7s files in DaVinci Resolve to QT MPEG 4 at source resolution 3840x2160 export to a 2nd camera transcode folder.
In Avid, link F5 files via AMA and transcode to DNxHD 36mbps proxy
When DaVinci Resolve files finish, link transcoded A7s files into avid and transcode to DNxHD 36 proxy
Group Clips (waveform analysis did not work) using visual sync.
Cut sequence
Commit Multi-cam edit
Export No Groups sequence out via AAF
Import AAF into DaVinci Resolve and link using source camera files, for the A7s the source files are the MPEG 4 files transcoded earlier in DaVinci Resolve
Color correct in Resolve and export out as MPEG 4 files using source resolutions.
Import into After Effects resize and key with background using Key-light with advanced suppression. (note; SpectraMatte had problems keying the UHD 4:2:0 A7s footage, the new Keylight in After Effects nails it.
Render out of After Eeffects as 1920x1080 files DnxHD
In Avid AMA Link the files from AE, consolidate and duplicate the multi-cam timeline manually, add fonts, export out for delivery.
Is there a better way to do this? The final looks great, just getting there is difficult.
Lessons Learned;
We bid on this project knowing we would have to use an inexpensive second camera, the A7s properly setup looks incredibly close to my F5, all that was needed was a slight color correction in Resolve to take some red out of the second camera, we used canon stills lenses on the A7s camera. But the workflow is the killer, everything I saved in production I will loose in post.