4K NDI High Bandwidth Mode about klakndi

[keijiro]

(Reformatted the original post)

[blueRonc3]

I'm not sure were to go with this to find a working solution, but in case someone experiences this challenge with 4K High Bandwidth I got this response from NDI support:

As I checked the code of the NDIlib_util_P216_to_V210, the portion of it is require for the user to as attached below to define the V210 portion. Assuming that is the only error is that then it seems to me they is not enough memory allocated to handle 4k frames at 60fps when you are encoding it. Since NDI does define that portion, that is up to the users to allocate memory for it and then NDI will outputted for the user.

// This is a helper function that you may use to convert from 10-bit packed UYVY into 16-bit semi-planar. The
// FourCC on the source is ignored in this function since we do not define a V210 format in NDI. You must
// make sure that there is memory and a stride allocated in p_dst.

[blueRonc3]

I found the solution. For our system, capturing at 4K 30 fps rather than 4K 60fps worked. The background consisted of a massive LED wall. When the contrast or brightness quickly changed from dark to light (approx 1 sec) in the background LED wall content, there was a massive spike in network resource traffic coming from the NDI PTZ (Panasonic AW-UE100) camera. Which would then crash my Unity app. It always happened at the same function in the Processing.NDI.Lib.x64.dll. I was happy to find a setting to reduce the capture to 30fps on the camera.