Configuring v4l2 source parameters in deepstream-app

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
Jetson Orin DevKit
• DeepStream Version
7.1
• JetPack Version (valid for Jetson only)

• TensorRT Version
10.3
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

I am trying to run the deepstream-app with the configuration file for using a usb camera as the source.

When I try to specify the desired resolution in the config file, to use MJPG format for full-hd video and higher fps, it crashes with the error of “incorrect camera parameters”. I read in previous topics that you can modify the source code and adjust those parameter manually.
The referred file does not exist any more, and I couldn’t find a post that provided any insights.

I would appreciate any help.

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  1. Please find out your USB camera’s correct pipeline and parameters as DeepStream SDK FAQ - Intelligent Video Analytics / DeepStream SDK - NVIDIA Developer Forums
  2. With the correct pipeline, please modify the create_camera_source_bin() function and the corresponding definitions in /opt/nvidia/deepstream/deepstream/sources/apps/apps-common/src/deepstream_source_bin.c to implement the correct source bin.
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Thank you!

Edit:I followed the steps in FAQ and found the working pipeline which is:

gst-laucnh-1.0 v4l2src device=/dev/video0 ! 'image/jpeg, width=1920, height=1080, framerate=30/1' ! nvv4l2decoder mjpeg=true ! nvvideoconvert ! 'video/x-raw(memory:NVMM), format=NV12' ! mux.sink_0 nvstreammux name=mux width=1920 height=1080 batch-size=1 ! fakesink

In /opt/nvidia/deepstream/deepstream/sources/apps/apps-common/src/deepstream_source_bin.c I can only modify the parameters for the v4l2 camera, according to what works in the pipeline. Do I need to take care of the rest of the pipeline (handling the v4l2decoder, nvvideoconvert) as well or is it done automatically by the application?

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Please modify the code to implement this part as the source bin. The nvv4l2decoder and nvvideoconvert should be added to the source bin.