Hi,
I’m trying to set up a multi-camera configuration using the ZED Link Duo capture card and running into streaming issues when mixing the ZED X One 4K with other camera models. I’ve done extensive testing and documented all results below.
Environment:
- Platform: NVIDIA Jetson AGX Orin, JetPack 6.2.1, L4T R36.4.7
- ZED SDK: v5.2.2 (ZED_SDK_Tegra_L4T36.4_v5.2.2)
- ZED Link Driver: v1.4.1 (stereolabs-zedlink-duo_1.4.1-LI-MAX96712-L4T36.4.0_arm64)
Port configuration (per documentation):
- Port #0 (Group B): ZED X One 4K
- Port #1 (Group B): ZED X
- Port #2 (Group A): ZED X One 4K
- Port #3 (Group A): ZED X Mini
Test Results
Test 1 — ZED X + ZED X Mini only (2 cameras)
Ports: #1 (ZED X), #3 (ZED X Mini)
Detection: OK- ZED Explorer: Both cameras produce images
- ZED Studio: Simultaneous streaming works perfectly
Test 2 — 2x ZED X One 4K only (2 cameras)
Ports: #0 and #2 (per documentation)
- Detection: OK
- ZED Explorer: Both cameras produce images
- ZED Studio: Simultaneous streaming works perfectly
Test 3 — ZED X + ZED X Mini + ZED X One 4K (3 cameras, 4K on port #2)
Ports: #1 (ZED X), #2 (ZED X One 4K), #3 (ZED X Mini)
- Detection: All 3 cameras recognized
- ZED Explorer: Each camera produces images individually
ZED Studio (attempt A): Opened ZED X first → image OK. Opened ZED X Mini → no image. Tried ZED X One 4K → CAMERA STREAM FAILED TO START (code 28)(See Screenshot 1)- ZED Studio (attempt B): Opened ZED X One 4K first (3840x1200 @ 30fps) → OK. Opened ZED X (1920x1200 @ 30fps) → OK. Tried ZED X Mini →
CAMERA STREAM FAILED TO START (code 28)(See Screenshot 2) - → Only 2 cameras can stream simultaneously. The 3rd always fails with code 28.
Test 4 — ZED X + ZED X Mini + ZED X One 4K (3 cameras, 4K on port #0)
Ports: #0 (ZED X One 4K), #1 (ZED X), #3 (ZED X Mini)
- Detection: All 3 cameras recognized
- ZED Explorer: Unstable — 1st attempt: only ZED X One 4K produces images. 2nd attempt: ZED X One 4K and ZED X Mini produce images but ZED X does not. Results vary each time.
- ZED Studio: ZED X One 4K + ZED X Mini stream simultaneously, but ZED X does not produce an image.
- → Behavior is inconsistent and changes between attempts.
Test 5 — 2x ZED X One 4K + ZED X Mini (3 cameras)
Ports: #0 (ZED X One 4K), #2 (ZED X One 4K), #3 (ZED X Mini)
- Detection: All 3 cameras recognized
- ZED Explorer: ZED X One 4K units produce images, but ZED X Mini does not
- ZED Studio: ZED X Mini does not produce an image. After closing ZED X Mini and attempting to open a ZED X One 4K, it fails with
CAMERA STREAM FAILED TO START (code 28)
Test 6 — All 4 cameras
Ports: #0 (ZED X One 4K), #1 (ZED X), #2 (ZED X One 4K), #3 (ZED X Mini)
- Detection: All 4 cameras recognized
- ZED Explorer: Only the two ZED X One 4K units produce images. ZED X and ZED X Mini show either a black screen or the ZED Explorer logo.
- ZED Studio: Streaming is very unstable. Opening ZED X and ZED X Mini simultaneously fails with
"Couldn't open camera 58252258. Error: CAMERA STREAM FAILED TO START (code 28)". Even opening both ZED X One 4K units simultaneously is inconsistent — sometimes works, sometimes fails with the same error.
Questions:
- Is mixing ZED X One 4K with stereo cameras (ZED X / ZED X Mini) on the ZED Link Duo a supported configuration for simultaneous streaming?
- If so, is there a specific resolution/FPS setting or driver configuration required to make 3+ cameras stream simultaneously?
- Is the code 28 error a known bandwidth limitation of the ZED X One 4K, or could this indicate a hardware/driver issue?
Thank you!