Individual frames

[rich2020]

Is it possible for me to access the individual frames streamed?

I would like to calculate how long it takes for a frame rendered on the server to arrive on the client.
I'd also like to have the ability to intercept individual frames and say, drop one/many, etc.

Where should I look in the source to accomplish this? Any advice?

Many thanks

 

[dodgepong]

Er, what exactly are you trying to do?

 

[rich2020]

I'm sorry, I'm not really sure how else to phrase my question. I'd like to access the frame before it is sent over the network to the client machine. I have OBS running on an Amazon EC2 instance and I'd like to, before OBS streams the frame over the network, to access that frame.

 

[dodgepong]

To what end? It sounds like a strange thing to want to do.

I ask because I could just answer your question (kind of a complicated answer), but in my experience, when people ask strange questions like this, it's because they are trying to do something where there is a better solution available to them.

 

[rich2020]

I want to understand how OBS-MP is hooking into an application and intercepting the draw calls. I'd like to, for experimental and learning purposes, know where OBS does the injection, but also where it captures the frames. I have had a look through graphics.c and obs-video.c (specifically at output_frame & output_video_data), but I am unsure of how to work with the frame. How could I pipe that frame to a .PNG file, for example?

 

[Lain]

If you want to access raw frame data you'd just create a custom output for it. Custom outputs aren't entirely supported in the "basic" front-end though at the moment, so you'd probably want to write a test front-end if you're just testing things. It's actually not very difficult to set up.