obs-studio | OBS Studio - Free and open source software for live streaming and screen recording | Video Utils library

I recently started learning how to use Vulkan. I'm following this tutorial but even with a copy/paste of their code I got an error because VK_LAYER_KHRONOS_validation is not listed when I call vkEnumerateInstanceLayerProperties().

In the Vulkan configurator, VK_LAYER_KHRONOS_validation appear in the right panel but not in the bottom one (I'm not sure about what this configurator is for but there is an "Available Layers" category in the bottom panel and the names written there are the one listed by vkEnumerateInstanceLayerProperties()).

Good day, I have here a batch file (I call Installer.bat because it installs softwares)

I am trying obs-studio-node.
This module require libobs as dependency. While building this module it download a pre-built version of libobs if none is specified. We can specify out custom libobs as mentioned in README.md

I followed these steps to build libobs. These steps are listed in README.md

1. git clone https://github.com/stream-labs/obs-studio
2. cd obs-studio
3. git submodule update --init --recursive
4. mkdir build
5. cd build
6. cmake .. -DENABLE_UI=false -DDepsPath="C:\Users\alokm\Downloads\dependencies2019\win64" -DENABLE_SCRIPTING=false -G"Visual Studio 16 2019" -A x64
7. cmake --build .
8. cpack -G ZIP

Last step (cpack -G ZIP) is failing with errors

• I use NVENC (nvEncodeAPI) interface hardware encoding H264, and then RTMP to stream out, when using ffplay to pull the stream to watch, I found that the picture is obviously distorted: the green lines become sharper? the text color becomes lighter and blurred, it is not improved even if I increase the video bitrate to 3Mbps(720P). I also know that H264 encoding is lossy, and some information will be discarded.
• Then I try to adjust the NV_ENC_CONFIG_H264_VUI_PARAMETERS parameter: when set color-space to "pc, bt709", there are some minor improvements. Maybe the color-space setting has more potential for improvement? For NVENC encoding, is there a higher video clarity setting scheme? I don't know how much space for technical improvement is here? based on the code: https://github.com/obsproject/obs-studio/blob/master/plugins/obs-ffmpeg/obs-ffmpeg-nvenc.c

I am trying to write a script that manages dotfiles for me, and this is what I have:

I am trying to create simplest virtual webcam application which can display image file on my local filesystem.

After initial research on stackoverflow links and seeing OBS Studio source code I got some idea how can I achieve this.

1. I would need to use Microsoft DirectShow.

2. I would need to develop one source filter that would work as capture filter using IBaseFilter

3. I would need to develop another source filter that would work as output filter or virtual webcam filter. I would need to compile this filter as .dll file and will need to register using regsvr32.exe
   As given on https://docs.microsoft.com/en-us/windows/win32/directshow/building-directshow-filters

4. I would need to create Filter Graph and Capture Filter Graph using CoCreateInstance like

   hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IFilterGraph, (void **)&graph);

   hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void **)&builder);

5. Then I would need to add these filters to Filter Graph

6. Then I would set Filter Graph to Capture Filter Graph like hr = builder->SetFiltergraph(graph);

Here is my confusion now:
After these steps I am not sure if I have to wrap these Graph Filters and Capture Graph Filter in one application which would be having main method and compile it to get .exe file or I need to compile as another .dll file.

Or How should I wrap these steps to create final application?

I want to stream a static image to the android studio emulator. To do that I created a virtual camera using v4l2loopback v.12.5 in linux ubuntu 20.04. The virtual camera is created in /dev/video2. I can stream there using obs and a plugin, ffmpeg or gstreamer but I've got different issues with each one. I don't care which software works... I always use an image with the resolution 1920x1080 to test this.

OBS: I installed the obs plugin following this tutorial here. It explains how to install v4l2loopback and add the plugin to obs. The plugin is called obs-v4l2sink. I start v4l2loopback using this command:

I followed this guide to create a very basic Vulkan program, and for some reason, even when completely copying the code from the guide (and not using my own version which is slightly different and modified to my needs) I still receive the following two validation layer errors upon starting the program:

I am trying to install this plugin: https://github.com/CatxFish/obs-v4l2sink

I followed all the steps (Installed QT, got obs-studio source code and then tried to build the plugin):