[$100] obs_reset_video causes black monitor_capture

[Segergren]

EDIT! I've now setup a minimalistic repo to reproduce the issue: https://github.com/Segergren/obs-csharp-example/tree/working-with-screen-tearing-and-lag

Hi! So I have had this issue where monitor_capture lags a lot when recording. It does not lag when recording through OBS so there must be some type of bug in my application. One thing I can think of is that I'm not loading the modules in the correct order according to the docs: https://docs.obsproject.com/frontends#initialization-and-shutdown

Docs: obs_startup() -> obs_reset_video() -> obs_reset_audio() -> obs_add_module_path() -> obs_load_all_modules() -> obs_post_load_modules().

Segra: obs_startup() -> obs_add_module_path() -> obs_reset_audio() -> obs_load_all_modules() -> obs_reset_video() -> obs_post_load_modules()

If I change the order in Segra so that I run obs_reset_video() before obs_load_all_modules(); it causes monitor_capture to have

12:49:03:726	[12:49:03 INF] info: [duplicator-monitor-capture: 'display'] update settings:
12:49:03:726		display:  (0x0)
12:49:03:726		cursor: false
12:49:03:726		method: WGC
12:49:03:726		id: 
12:49:03:726		alt_id: 
12:49:03:726		setting_id: DUMMY
12:49:03:726		force SDR: false
12:49:03:726	[12:49:03 INF] debug: source 'display' (monitor_capture) created

instead of just logging

12:49:03:726	[12:49:03 INF] debug: source 'display' (monitor_capture) created

Does anyone have any clue on what can cause this behaviour or any idea on how to fix this.
If you can help me with any clue that lead to the black screen and the lag is gone, I'll issue a $100 bug bounty to you :)

Here is the current initialization code (without black screen because I call obs_load_all_modules() before obs_reset_video().
Code for init: https://github.com/Segergren/Segra/blob/984bba1ab30a26100f34a88f8190e85657a6af86/Backend/Utils/OBSUtils.cs#L227
Code for setting up monitor_capture: https://github.com/Segergren/Segra/blob/984bba1ab30a26100f34a88f8190e85657a6af86/Backend/Utils/OBSUtils.cs#L382

[alinsavix]

Are you trying to record a game? Is that game framerate-limited? If it's not, the game will starve your app of resources and everything will be laggy. The nvidia driver (if that's what I you're using) automatically prioritizes official OBS builds, but not other builds.

If run as admin, OBS will give itself priority for GPU resources, you could presumably do the same.