I’m building a connection via a framegrabber (AV.io), combined with a electromagnetic tracker, to 3D Slicer via the Plus Server. However, I noticed a too high temporal resolution for tracked ultrasound (+/-130 ms) while streaming my videostream via the Microsfot Media Foundation protocol, following the protocols of the Plus Server: Plus applications user manual: Device set configuration
Although a better and specific Epiphan streaming protocol is working for the DVI2USB 3.0 grabbers, those framegrabbers are discontinued. Which current available Epiphan framegrabber should I buy? I think that the latency will be better if I can use the dedicated Plus Server streaming protocol for the Epiphan framegrabber instead of current streaming protocol.
That’s correct. Via the Plus Server, we can stream both video and tracking data. This resulting in a video latency of 130 ms. How can we improve the video stream via the Plus Server Launcher? Or is it still able to buy the DVI2USB?
The delay is likely coming from the software itself - Plus Server, as the DVI2USB3.0, and our AVio capture cards, will pass uncompressed video via USB to the connected computer. Typically, the HDMI/DVI → USB conversion adds about 16 - 33 ms of delay.
Unfortunately the DVI2USB3.0 is discontinued and not available for purchase.
The AVio capture cards are available and use half the power, have an onboard scaller, 3.5 mm audio jack, and are UVC/UAC; no drivers required. The caveat is that the AVio devices will not work in the Epiphan Capture Tool, but it sounds like you’re not using that anyways.
Is Plus Server scaling the video from the DVI2USB3.0? If it is, you could try to match the resolutions of your video in Plus Server and hopefully that passes it through quicker