Output key and fill to video switcher

    Sep 21 2022 | 1:38 pm
    I am interested in using Jitter to output key and fill to a Blackmagic ATEM video switcher for overlay graphics. Are there any solutions to creating synchronized fill and key (alpha) channels to output either via the graphics card or using a Blackmagic Decklink Duo 2 with combined output channels. Has anyone tried to do this in Jitter? There are easy methods in OBS, Vmix, ProPresenter, etc., but I would like to do it in Jitter. (of course...)

    • Sep 21 2022 | 2:38 pm
      use syphon or spout to send jitter output to OBS
    • Sep 21 2022 | 3:25 pm
      Thanks Rob!
      So you are saying to send Jitter via syphon (NDI) to OBS (which I have already running on another machine), then pass the Jitter content from OBS via the Decklink card's key and fill outputs to the ATEM Switcher.
      For years I have been using Jitter as my primary video mixer and then sending the final output to the encoder for broadcast, but now I am changing my setup so that the ATEM Switcher combines outputs from Jitter, OBS (key and fill), 2 Hyperdeck Studios, and another Hyperdeck Mini for an additional key and fill. I think it will be much easier to manage this complex setup, plus the switcher has a lot of versatility in terms of layering, keying, and compositing.
      My project involves online performance with virtual sets.
    • Sep 22 2022 | 1:13 pm
      if you need to send from one computer to another, then yes NDI is the protocol to use. However if you only want to send from Jitter to some other device that is supported by OBS, you can simply run both apps on the same machine and send from Jitter to OBS using the Syphon protocol (no need for NDI, keeps everything on the GPU).
    • Sep 23 2022 | 9:50 am
      Thanks again Rob.
      Right now I am using SyphonNDI to send a feed via NDI to another computer that is outputting live to on air guests. I have assumed this method keeps the feed on the GPU. Do you know if this is true?
      But the idea of using OBS on the same machine to JUST get the Jitter output to a Decklink Duo 2 card for key + fill on an ATEM switcher is an excellent idea. And on that note, I couldn't find any documentation for preparing Jitter output for two channel key + fill. Do you have any thoughts on that as well?