Workflow block velocity

Hi
I am running a workflow with inference workflows process-video on my local inference server.

I am trying to use the workflow block “velocity”, but I am continuously getting errors:

RuntimeError: Encountered the following errors while processing the video:
{
“error_type”: “ExecutionEngineRuntimeError”,
“error_message”: “Requested Workflow output serialization, but for output velocity which evaluates into Python
type: <class ‘supervision.detection.core.Detections’> cannot successfully apply any of registered serializers.”,
“error_context”: “inference_thread”

It is not clear, how to vizualize the outputs of velocity. I am trying to use label visualizalization, but the error remains. the documentation of this building block seems a bit “light”, but I would appreciate any hints on how to get that running. (both for visualizing and for sinking the data for later analysis)

thx & cheers
Thomas

  • **Project Type:**inference on mp4 videos
  • **Operating System & Browser:**roboflow inference server GPU latest running on Docker/Debian12
  • **Project Universe Link or Workspace/Project ID:**beeometer

Hi @Thomas ,

Thank you for reporting this issue. Indeed, there was a problem with output representation of velocity block - this was fixed in Inference package and fix will be included in next release of Inference.

Thanks again,
Grzegorz

Hi Grzegorz

cool, thanks for the quick fix…so that will be available in v0.50.5 ?

thx & cheers

Thomas

Hi @Thomas,

We are already at 0.50.5 - so next release, most likely this Friday

Thanks again,
Grzegorz