WebRTC Visualization Error in Isaac Lab 2.1 Docker Container

[yk785496878]

docker pull nvcr.io/nvidia/isaac-lab:2.1.0

in docker :
./isaaclab.sh -p scripts/tutorials/00_sim/create_empty.py --livestream 2

Running isaacsim-webrtc-streaming-client on the host machine, but isaacsim-webrtc-streaming-client nodisplay

log:
[60.411s] [ext: omni.physx.fabric-106.5.7] startup
[INFO]: Setup complete...
main: thread_init: already added for thread
2025-07-29 03:34:46 [72,348ms] [Warning] [carb.livestream-rtc.plugin] onClientResizeRequested: Stream can't be resized, please make sure that /app/livestream/allowResize is set to true.
2025-07-29 03:35:02 [88,361ms] [Warning] [carb.livestream-rtc.plugin] onClientEventRaised: NVST_CCE_DISCONNECTED when m_connectionCount 0 != 1

[KirdenKe]

I encountered a similar issue, but it occurred when I executed the following command: LIVESTREAM=2 ./isaaclab.sh -p scripts/tutorials/00_sim/launch_app.py --size 0.5.

Env setting:

• NVIDIA RTX A6000
• Driver Version: 535.247.01

Then I noticed that if I ran runheadless.sh, it connected successfully. It seems that the disconnect issue only occurs when the livestream is opened via the python file.

Currently, the only way to run the program without issues is to add the --headless flag.

[yk785496878]

I encountered a similar issue, but it occurred when I executed the following command: LIVESTREAM=2 ./isaaclab.sh -p scripts/tutorials/00_sim/launch_app.py --size 0.5.

Env setting:

• NVIDIA RTX A6000
• Driver Version: 535.247.01

Then I noticed that if I ran runheadless.sh, it connected successfully. It seems that the disconnect issue only occurs when the livestream is opened via the python file.

Currently, the only way to run the program without issues is to add the --headless flag.

Are you run in docker?

[yk785496878]

I added --headless, but the running result remains the same in docker

./isaaclab.sh -p scripts/tutorials/00_sim/create_empty.py --headless --livestream 2

[58.819s] Simulation App Startup Complete
[59.031s] [ext: omni.physx.fabric-106.5.7] startup
[INFO]: Setup complete...
main: thread_init: already added for thread
2025-07-30 08:53:20 [63,024ms] [Warning] [carb.livestream-rtc.plugin] onClientResizeRequested: Stream can't be resized, please make sure that /app/livestream/allowResize is set to true.
2025-07-30 08:53:36 [79,044ms] [Warning] [carb.livestream-rtc.plugin] onClientEventRaised: NVST_CCE_DISCONNECTED when m_connectionCount 0 != 1
main: thread_init: already added for thread
main: thread_init: already added for thread
2025-07-30 09:11:45 [1,167,375ms] [Warning] [carb.livestream-rtc.plugin] onClientResizeRequested: Stream can't be resized, please make sure that /app/livestream/allowResize is set to true.
2025-07-30 09:11:48 [1,170,987ms] [Warning] [carb.livestream-rtc.plugin] onClientEventRaised: NVST_CCE_DISCONNECTED when m_connectionCount 4294967295 != 1
2025-07-30 09:11:48 [1,170,992ms] [Warning] [carb.livestream-rtc.plugin] onClientEventRaised: NVST_CCE_DISCONNECTED when m_connectionCount 4294967294 != 1
main: thread_init: already added for thread
main: thread_init: already added for thread
2025-07-30 09:12:59 [1,241,963ms] [Warning] [carb.livestream-rtc.plugin] onClientResizeRequested: Stream can't be resized, please make sure that /app/livestream/allowResize is set to true.
2025-07-30 09:13:15 [1,257,974ms] [Warning] [carb.livestream-rtc.plugin] onClientEventRaised: NVST_CCE_DISCONNECTED when m_connectionCount 4294967293 != 1

[KirdenKe]

Sorry for the unclear reply earlier.
According to the official documentation, I don't think the headless and livestream flags can be used together.
I suggest you just remove the livestream flag from the command and it should work as expected.

New command:

./isaaclab.sh -p scripts/tutorials/00_sim/create_empty.py --headless

The output will be:

[INFO]: Setup complete...

Of course, adding the “headless” flag means there will be no GUI.
Currently, I still need to open the GUI on the host’s physical OS (Windows) to confirm everything is okay before running it on the remote host for acceleration.

I would also like someone can response the issue where running runheadless.sh connects successfully, but executing LIVESTREAM=2 ./isaaclab.sh -p scripts/tutorials/00_sim/launch_app.py always fails to connect.

[RandomOakForest]

You may want to try the latest version of Isaac Lab. Follow #3021 to update. I'll move this issue to our Discussions for follow up.