Known Issues#

Pipeline server exits with 2 GPU streams#

Symptoms:

  • When two GPU pipeline streams are started, the pipeline server exits from the container.

Hardware:

  • Issue observed on BMG-580 discrete GPU.

RTSP Stream not reachable from Live Video Captioning Application#

Symptoms:

  • Stream not able to play or pipline not able to start

  • DLSPS container shows logs as below:

    dlstreamer-pipeline-server  | 0:01:06.194223369     8 0x7060180012c0 ERROR           default gstrtspconnection.c:1291:gst_rtsp_connection_connect_with_response_usec: failed to connect: Could not connect to 10.102.14.14: Socket I/O timed out

Checks:

  • Include rtsp stream ip in no_proxy environment variable.

WebRTC connectivity issues#

Symptoms:

  • Black video, no stream, or connection failures in the dashboard.

Checks:

  • Verify HOST_IP in .env is reachable from the browser client.

  • Confirm firewall rules allow the configured ports.

No models in dropdown#

Symptoms:

  • Model list is empty in the UI.

Checks:

  • Ensure ov_models/ contains at least one model directory with OpenVINO IR files.

  • If you downloaded models, re-run the stack so the service rescans.

Pipeline server unreachable#

Symptoms:

  • Starting a run fails; backend reports it cannot reach the pipeline server.

Checks:

  • Ensure the dlstreamer-pipeline-server service is running.

  • Verify PIPELINE_SERVER_URL (defaults to http://dlstreamer-pipeline-server:8080).

Port conflicts#

If the dashboard or APIs are not reachable, check whether the ports are already in use and update the .env values (for example DASHBOARD_PORT).

Performance/throughput lower than expected#

  • Larger VLMs require more compute and memory; try a smaller model.

  • Reduce max_tokens.

  • Ensure hardware acceleration and drivers are installed if using GPU.

Gemma model not working in GPU#

  • Gemma model is not working on GPU. Only working on CPU.

Limited testing on EMT-S and EMT-D#

  • This release includes only limited testing on EMT‑S and EMT‑D, some behaviors may not yet be fully validated across all scenarios.

Known EMT Limitation with External RTSP Streams#

Due to an EMT networking limitation, RTSP streams must be deployed within the same Docker network as the application (accessed via container/service name). RTSP streams hosted outside the Docker network or accessed using are not supported