120 FPS camera stuck at 30 FPS

[dustinlieu]

My camera reports that it supports 120 FPS at 320x240, but PhotonVision is maxing out at 30 FPS, even in driver mode. I tried another camera, different model, and that was able to get past 30 FPS, so it seems like an issue with this camera specifically.

Hardware:

• RUBIK Pi 3, powered through USB-C
• ELP-USBFHD01M-L 180

PhotonVision version: dev-v2025.3.2-83-ge84e3e7c

ubuntu@photonvision:~$ v4l2-ctl --list-devices
cam-req-mgr-devnode (no bus info):
        /dev/media2
        /dev/media3

msm_vidc_media (platform:aa00000.video-codec):
        /dev/media1

msm_vidc_decoder (platform:msm_vidc_bus):
        /dev/video32
        /dev/video33

USB 2.0 Camera: HD USB Camera (usb-0000:01:00.0-2):
        /dev/video0
        /dev/video1
        /dev/media0

ubuntu@photonvision:~$ v4l2-ctl --device /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
        Type: Video Capture

        [0]: 'MJPG' (Motion-JPEG, compressed)
                Size: Discrete 1920x1080
                        Interval: Discrete 0.033s (30.000 fps)
                Size: Discrete 1280x720
                        Interval: Discrete 0.017s (60.000 fps)
                Size: Discrete 1024x768
                        Interval: Discrete 0.033s (30.000 fps)
                Size: Discrete 640x480
                        Interval: Discrete 0.008s (120.101 fps)
                Size: Discrete 800x600
                        Interval: Discrete 0.017s (60.000 fps)
                Size: Discrete 1280x1024
                        Interval: Discrete 0.033s (30.000 fps)
                Size: Discrete 320x240
                        Interval: Discrete 0.008s (120.101 fps)
        [1]: 'YUYV' (YUYV 4:2:2)
                Size: Discrete 1920x1080
                        Interval: Discrete 0.167s (6.000 fps)
                Size: Discrete 1280x720
                        Interval: Discrete 0.111s (9.000 fps)
                Size: Discrete 1024x768
                        Interval: Discrete 0.167s (6.000 fps)
                Size: Discrete 640x480
                        Interval: Discrete 0.033s (30.000 fps)
                Size: Discrete 800x600
                        Interval: Discrete 0.050s (20.000 fps)
                Size: Discrete 1280x1024
                        Interval: Discrete 0.167s (6.000 fps)
                Size: Discrete 320x240
                        Interval: Discrete 0.033s (30.000 fps)

photonvision-logs.zip

[samfreund]

Note for other devs: this camera model uses an OV2710 sensor

[mcm001]

I think we should give one of the v4l cli tools to make sure the camera will give at least userland frames at full rate and go from there