I'm attempting to record (to a file) three or more 1080p webcams on a single computer simultaneously.
I successfully used two instances of OBS studio to record two webcams. The third instance throws this error:
"Starting the output failed. Please check the log for details. Note: If you are using the NVENC or AMD encoders, make sure your video drivers are up to date."
Digging deeper I found on the Nvidia NVENC wiki:
Consumer targeted GeForce graphics cards support no more than 2 simultaneously encoding video streams, regardless on the count of the cards installed. Professional cards support between 2 and 21 simultaneous streams per card, depending on card model and compression quality.
What video card or what configuration of video cards do I need to be able to get more NVENC video streams?
This Nvidia forum post indicated that video cards not in sli would each contribute to the encoding. However, the wiki link quoted above indicated that this would not give more NVENC streams.