[FFmpeg-user] A question on the Quadro P6000 and maximum simultaneous NVENC encodes in FFmpeg

Dennis Mungai dmngaie at gmail.com
Thu Aug 23 19:54:14 EEST 2018

Hello there,

For users with this specific card (and FFmpeg installed), kindly clarify on
the following:

(a). How many simultaneous encoder sessions can you run on this card?

(b). Have you ran into any issues, such as stuttering and dropping streams
with multiple concurrent encodes?

I ask because of a recent case where adding more than ~40 concurrent
encodes would make the output "drop" and stutter massively, as if FFmpeg
itself was hanging, despite the GPU having more than enough VRAM (24GB?)
and resources (under ~11% utilization according to nvidia-smi), implying
some sort of artificial limitation in effect despite the GPU support matrix
specifying otherwise:

Your feedback on this is appreciated.

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