USB Capture (MacroSilicon 534d:2109) – Device detected but black screen in Hyperion / ffmpeg test

Hello everyone,

I’m having an issue with a USB video capture device that is detected correctly, but only produces a black image in Hyperion and during tests.

System

• OS: DietPi (arm64)

• Hyperion: latest repo version

• Capture device: USB3.0 capture

  ID 534d:2109 (MacroSilicon)

• LEDs: APA102 (SPI)

USB / Kernel

Device is detected correctly:

lsusb
ID 534d:2109 MacroSilicon USB3.0 capture

Kernel driver:

dmesg | grep -i uvc
Found UVC 1.00 device USB3.0 capture
uvcvideo registered

V4L2 Devices

v4l2-ctl --list-devices
USB3.0 capture:    /dev/video1    /dev/video2    /dev/media0

Hyperion uses /dev/video1.

Hyperion status

Hyperion starts the V4L2 grabber without errors:

Pixel format = mpjeg
V4L2 grabber started

But the image is completely black.

ffmpeg Test

With Hyperion stopped:

service hyperion@root stop

ffmpeg -f v4l2 \  -input_format mpjeg \  -video_size 1280x720 \  -i /dev/video1 \  -frames:v 1 test.jpg

Result:

• Command runs

• Output file is created

• Image is black

Additional notes

• Device is busy when Hyperion is running (expected)

• No error messages from kernel or Hyperion

• Tried different resolutions and frame rates

• MJPEG and YUYV tested

Questions

1. Is /dev/video1 the correct node for this capture device?

2. Could /dev/video2 be the actual video stream?

3. Are there known issues with MacroSilicon 534d:2109 grabbers producing black frames?

4. Any recommended format / resolution settings for this device in Hyperion?