We have an AJA io 4k in the studio for testing purposes.
A few notes…
- Within VDMX it will work for basic usage through AVFoundation as inputs, if there’s any specific tests you’d like us to try out let me know.
- Beyond that, we’ve been looking into possibly adding native support in VDMX through their SDK, and / or potentially releasing a freebie app similar to BlackSyphon; last time I asked around there wasn’t much demand for it (compared to other new features we can focus on), but we have written a bunch of test code for this already and it might happen at some point.
- With regard to video outputs, this is something we could do with native AJA support in VDMX (similar to how we support BlackMagic output), however! there is a big gotcha. While these device are handy for doing an ‘extra’ output, there is actually a big performance hit compared to doing a direct output from your graphics card. Since all the video rendering in VDMX takes place on the GPU, images need to be read back to the CPU in order to be sent out by such devices. We we generally recommend against this technique unless absolutely needed; to get the best performance you’d be best off using an HDMI to HD-SDI adapter from your regular monitor outputs.
- While it might be technically possible to capture multiple audio streams of input through an IO 4k, you might be best off using a more traditional audio interface (see notes below). I say this because the IO 4k does not have any RCA, 1/4" or other audio cable inputs; you’d need some way to attach that multi-track audio along with a video input stream. That might work for your particular needs, but it is generally a pain.
- If you haven’t already scoped it out, this thread has some discussion around devices that people seem to be commonly using for video capture recently, Video capture devices thread
And as far as multi-channel audio inputs…
- When it comes to multi-channel audio inputs, you’ve got a lot of options (a quick google search brings up this nice looking comparison, https://www.gearank.com/guides/audio-interface and the top ranked 4-6 channel input interface appears to be only $100)
- VDMX will work with multiple audio interfaces, so if you get a couple of cheap stereo inputs and a USB hub, that might be your lowest cost option if you are just looking to play around before deciding on a more expensive purchase.
- Here is a tutorial on using multi-channel audio from app to app through Soundflower (https://vdmx.vidvox.net/tutorials/analyzing-multiple-audio-tracks-from-live-in-vdmx-with-soundflower) and the same basic idea / technique applies when working with external interfaces / multiple interfaces.