File size: 2,108 Bytes
0d4136a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | # SPDX-License-Identifier: MIT
# Copyright (C) Intel Corporation
#
# Object Counting: DLStreamer pipeline sample.
# See README.md for prerequisites and inputs. Run: python3 dlstreamer_sample.py
from collections import Counter
import gi
gi.require_version("Gst", "1.0")
gi.require_version("GstAnalytics", "1.0")
from gi.repository import Gst, GLib, GstAnalytics
Gst.init([])
INPUT_VIDEO = "test_video.mp4"
# Only these classes are counted; the sample video contains pedestrians,
# a cyclist, and cars.
CLASSES_OF_INTEREST = {"person", "bicycle", "car"}
# Select the model: "yolo26n" (default) or "detr-resnet-50".
MODEL = "yolo26n"
# For CPU: change device=GPU to device=CPU.
# For NPU: change device=GPU to device=NPU (batch-size=1, nireq=4 recommended).
pipeline_str = (
f"filesrc location={INPUT_VIDEO} ! decodebin3 ! "
"videoconvert ! "
f"gvadetect model={MODEL}_openvino_model/{MODEL}.xml "
"device=GPU "
"threshold=0.4 ! queue ! "
"gvawatermark ! videoconvert ! video/x-raw,format=I420 ! "
"openh264enc ! h264parse ! "
"mp4mux ! filesink name=sink location=output_dlstreamer.mp4"
)
pipeline = Gst.parse_launch(pipeline_str)
def on_buffer(pad, info):
buf = info.get_buffer()
rmeta = GstAnalytics.buffer_get_analytics_relation_meta(buf)
if rmeta is None:
return Gst.PadProbeReturn.OK
counts = Counter()
idx = 1
while True:
ok, od = rmeta.get_od_mtd(idx)
if not ok:
break
label = GLib.quark_to_string(od.get_obj_type())
if label in CLASSES_OF_INTEREST:
counts[label] += 1
idx += 1
if counts:
summary = ", ".join(f"{n} {name}" for name, n in counts.items())
print(f"Object counts: {summary}", flush=True)
return Gst.PadProbeReturn.OK
sink = pipeline.get_by_name("sink")
sink.get_static_pad("sink").add_probe(Gst.PadProbeType.BUFFER, on_buffer)
pipeline.set_state(Gst.State.PLAYING)
bus = pipeline.get_bus()
bus.timed_pop_filtered(
Gst.CLOCK_TIME_NONE,
Gst.MessageType.EOS | Gst.MessageType.ERROR,
)
pipeline.set_state(Gst.State.NULL)
|