Sync worker-safety-detection from metro-analytics-catalog

README.md

@@ -110,7 +110,7 @@ pipeline_str = (
     f"filesrc location={INPUT_VIDEO} ! decodebin3 ! "
     f"gvadetect model={MODEL_XML} device=CPU threshold=0.4 ! queue ! "
     f"gvawatermark ! videoconvert ! video/x-raw,format=I420 ! "
-    f"openh264enc ! h264parse ! "
+    f"x264enc ! h264parse ! "
     f"mp4mux ! filesink name=sink location=output.mp4"
 )
 pipeline = Gst.parse_launch(pipeline_str)
@@ -139,6 +139,22 @@ bus.timed_pop_filtered(
 pipeline.set_state(Gst.State.NULL)
 ```
 
+### Try It on a Sample Video
+
+The `export_and_quantize.sh` script downloads `test_video.avi` automatically.
+Run the DLStreamer sample above.
+The buffer probe prints one line per detected safety item per frame.
+
+Expected console output (representative):
+
+```text
+  [PPE] safety_helmet conf=0.87
+  [PPE] safety_jacket conf=0.82
+```
+
+The annotated video is saved to `output.mp4` with bounding boxes drawn by
+`gvawatermark` around each detected `safety_helmet` and `safety_jacket`.
+
 **Device targets:**
 
 - `device=CPU` -- default in the sample code.