Bitrate and latency in DCS

[Sparviero1978]

I'm having some trouble understanding how bitrate works in relation to latency, in particular in Virtual Desktop. Obviously the former influences the latter, but do the effects vary depending on the game? Let me explain: my 6G system handles h.264+ well at 500, in fact even selecting the automatic mode VD suggests values of 450+. With most games I don't have lag, but with DCS (notoriously heavy despite the 5090) I do. Lowering it to 300 makes the lag disappear. Is this normal? I thought that latency depended only on the bitrate, since if set to 500 (or another value) the flow of data to be processed is always the same, regardless of the game/setting. I notices that the spikes I got at 500 may be linked to ms increase in network latency. What do you think? Thanks

[peachmonkey]

VD is a display streamer, and DCS has no knowledge of the VD. It's everything to do with your system software and hardware, starting with your motherboard, 802.11ax router, clean channel availability, etc, as well as VD configuration. Increased latency can indicate a retransmission situation, i.e. increased/high error correction, however figuring out at which exact layer it's happening is a rather involved troubleshooting activity. The VD app itself can be fighting for the pc resources with DCS running, so a windows process prioritization is also important, i.e. the lower bandwidth requires less CPU resources for compression, vs. high bandwidth, etc. 

[Sparviero1978]

Ok, I understand that is not specifically due to DCS, but what about relation of total latency, bitrate and game setting? Eg. in a performance wise scenario, at h.264 500 bitrate, all runs fine with game latency below 11, total latency 37. Conversely, in a fps-heavy scenario, besides game latency still under 11 (thus solid 90 fps), total latency rise to 48, with some randomized spikes here and there. At 300, light or heavy scenario are the same, total latency 37 ms. Is it normal? Is due to connection? I though that once enstablished a good bitrate for your wifi config, no matter what you stream/gfx settings. Am I wrong? Thanks

[sleighzy]

You may want to ask these questions on the Virtual Desktop Discord server, they’ll have all your answers.

https://discord.gg/FTEcbPGUa8