Frame Synchronization for Multiple Cameras on Nvidia Jetson Orin Nano

Issue Overview

Users are experiencing difficulties with camera frame synchronization when using multiple cameras on the Nvidia Jetson Orin Nano development board. The main concerns include:

• Lack of clear documentation on how to implement frame synchronization
• Uncertainty about the presence of FSYNC (frame sync) pins on the Nvidia module
• Questions about hardware design recommendations for achieving synchronization
• Confusion regarding the difference between processing synchronized images and actually synchronizing the camera modules

This issue is particularly relevant for embedded systems that require precise timing and coordination between multiple camera inputs.

Possible Causes

1. Hardware Limitations: The Nvidia Jetson Orin Nano module may not have dedicated FSYNC pins for hardware-level synchronization.

2. Lack of Reference Design: Nvidia does not currently provide a reference camera module with FSYNC capabilities, which may contribute to the uncertainty in implementation.

3. Software Configuration: Users might be confusing software-based synchronization processing with hardware-level frame synchronization.

4. Documentation Gaps: The absence of clear documentation on hardware-level synchronization methods for multiple cameras may lead to confusion among developers.

5. Misunderstanding of Available Resources: Users may not be aware of the existing software solutions and examples provided by Nvidia for handling synchronized image processing.

Troubleshooting Steps, Solutions & Fixes

1. Explore MMAPI Package

   • Install the Nvidia L4T Jetson Multimedia API package:

     sudo apt install nvidia-l4t-jetson-multimedia-api
     

   • Examine the Argus samples, particularly the syncSensor and syncStereo examples located at:
     /usr/src/jetson_multimedia_api/argus/samples/
     These samples demonstrate how to process synchronized images in software.

2. Understand Hardware Limitations

   • Be aware that the Nvidia Jetson Orin Nano module itself may not have dedicated FSYNC pins for hardware-level synchronization.
   • Consider designing custom carrier boards or camera modules that incorporate FSYNC functionality if hardware-level synchronization is required.

3. Consult Camera Partners

   • Reach out to Nvidia’s Jetson Camera Partners for specialized camera solutions that may offer built-in synchronization capabilities.
   • Discuss your specific requirements and explore options for camera modules with integrated FSYNC functionality.

4. Review Technical Resources

   • Read the Nvidia Technical Blog post on "Selecting the Right Camera for the NVIDIA Jetson and Other Embedded Systems" for insights into camera selection and integration.
   • Pay special attention to any sections discussing multi-camera setups or synchronization techniques.

5. Implement Software-based Synchronization

   • If hardware-level synchronization is not feasible, focus on optimizing software-based synchronization methods.
   • Utilize the Argus API and provided samples to develop robust software synchronization algorithms for your specific use case.

6. Consider Alternative Synchronization Methods

   • Explore the possibility of using external trigger signals or precision time protocols (PTP) for synchronizing multiple cameras.
   • Investigate third-party solutions or hardware add-ons that could facilitate frame synchronization across multiple camera modules.

7. Engage with Developer Community

   • Participate in Nvidia Developer forums and community discussions to share your specific requirements and challenges.
   • Collaborate with other developers who may have implemented custom solutions for multi-camera synchronization on Jetson platforms.

8. Custom Hardware Development

   • If your application absolutely requires hardware-level frame synchronization, consider developing a custom carrier board that incorporates FSYNC functionality.
   • Work with hardware engineering teams or consultants to design a solution that meets your specific synchronization needs.

9. Stay Updated

   • Regularly check Nvidia’s documentation and release notes for any updates or new features related to camera synchronization on Jetson platforms.
   • Subscribe to Nvidia Developer newsletters or follow their social media channels for announcements about new camera modules or synchronization solutions.