[borealcat]

(Also posted in feature request forum, posting here in case any current capabilities natively or through plug-ins)

Curious whether this would possible for art gallery 3D video installation:
synchronised simultaneous playback of separate stereo3D 24fps frame-packing video files to separate projector outputs.

Synchronised playback of side by side 3D files is possible with players such as VLC, however only for regular 2D content, or compressed side-by-side 3D content fitting into 1920x1080p frame, which cuts resolution in half.

Kodi playing frame packed 3D content natively is very interesting for maintaining high image fidelity.... just need to be able to synchronise multiple files to multiple screens (2-3). Anyone out there familiar with whether such plugins exist, or the coding this would require?

How accurate does synchronization need to be ? 

If its just in the order of 1 second or so, then you probably just need to write some script that some of the remote control APIs of kodi to start playback of video clips at the same time.  

how would the videos be displayed anyhow ? 3D tv screens with active glasses ? 

Hi there, sorry slow reply as was off grid for a while. Synchronisation in order of one second would be fine for the content. However I have learned that synchronisation of active shutter glasses across multiple projectors requires the videos to play back as the same, ie frequency needs to be identical, as though they are the same file. (if this is not done, then the glasses sync between projectors differs, with unacceptable results when looking from one screen to another)

I have succeeded with this by creating a two channel compressed side by side 3D video file, where two sbs videos fill the frame that is 3840x1080, and spans two screens, one video appearing on each screen, and perfectly synchronised since they are embedded in the same video file. This level of synchronisation is what i would also need to accomplish in a  frame-packing environment, which would double the resolution. 

Alas, I know nothing about writing code.