Sync loitering-detection from metro-analytics-catalog

.gitattributes

@@ -33,3 +33,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+expected_output_dlstreamer.gif filter=lfs diff=lfs merge=lfs -text

README.md

@@ -1,7 +1,5 @@
 # Loitering Detection
 
-> **Validated with:** OpenVINO 2026.1.0, NNCF 3.0.0, DLStreamer 2026.0, Ultralytics 8.4.46, Python 3.11+
-
 | Property | Value |
 |---|---|
 | **Category** | Object Detection + Tracking + Zone Analytics |
@@ -152,15 +150,16 @@ LOITERING_SECONDS = 5.0
 
 pipeline_str = (
     f"filesrc location={INPUT_VIDEO} ! decodebin3 ! "
+    f"videoconvert ! "
     f"gvaattachroi roi={ROI} ! "
-    f"gvadetect inference-region=1 model={MODEL_XML} device=CPU "
+    f"gvadetect inference-region=1 model={MODEL_XML} device=GPU "
     f"threshold=0.5 ! queue ! "
     f"gvatrack tracking-type=short-term-imageless ! queue ! "
     f"gvametaconvert add-empty-results=true ! queue ! "
     f"gvafpscounter ! "
     f"gvawatermark ! videoconvert ! video/x-raw,format=I420 ! "
     f"openh264enc ! h264parse ! "
-    f"mp4mux ! filesink name=sink location=output.mp4"
+    f"mp4mux ! filesink name=sink location=output_dlstreamer.mp4"
 )
 pipeline = Gst.parse_launch(pipeline_str)
 
@@ -248,7 +247,7 @@ LOITERING id=29 dwell=5.0s anchor=(90,322)
 
 Approximately 10–12 loitering events are expected over the full video.
 
-The annotated video is saved to `output.mp4` with green bounding boxes and
+The annotated video is saved to `output_dlstreamer.mp4` with green bounding boxes and
 track IDs drawn by `gvawatermark` around every detected person.
 
 > **Known warning:** The `openh264enc` element prints
@@ -257,6 +256,16 @@ track IDs drawn by `gvawatermark` around every detected person.
 > video is encoded correctly. The warning comes from the OpenH264 library's
 > internal logging and does not indicate a real error.
 
+#### Expected Output
+
+![DLStreamer expected output](expected_output_dlstreamer.gif)
+
+**Device targets:**
+
+- `device=GPU` -- default in the sample code.
+- `device=CPU` -- change `device=GPU` to `device=CPU`.
+- `device=NPU` -- change `device=GPU` to `device=NPU`; use `batch-size=1` and `nireq=4` for best NPU utilization.
+
 ---
 
 ## License

export_and_quantize.sh

@@ -39,7 +39,7 @@ fi
 echo "--- Downloading sample test video ---"
 if [[ ! -f VIRAT_S_000101.mp4 ]]; then
     wget -O VIRAT_S_000101.mp4 \
-        https://github.com/intel/metro-ai-suite/raw/refs/heads/videos/videos/VIRAT_S_000101.mp4
+        https://github.com/open-edge-platform/edge-ai-resources/raw/refs/heads/main/videos/VIRAT_S_000101.mp4
     echo "Downloaded: VIRAT_S_000101.mp4"
 else
     echo "Already present: VIRAT_S_000101.mp4"