I have attatched a demo based on deepstream_imagedata-multistream.py but with a tracker and analytics elements in the pipeline
there is the standard tiler_sink_pad_buffer_probe, aswell as nvdsanalytics_src_pad_buffer_prob,
In the analytics probe two functions are called process_nvdsanalytics_meta_data, we check if an object is in the ROI-RF bbox and remove them from the frame meta.
The second function process_tracker_meta_data reads the tracker_meta in a batch.
The goal is to completely remove an object from the pipline if it is within an ROI, maybe I am removing at the wrong point or am calling the wrong functions
def process_tracker_meta_data(batch_meta):
user_meta_list = batch_meta.batch_user_meta_list
# print('======================================================================================')
batch_tracker_decoded = {}
while user_meta_list is not None:
user_meta = pyds.NvDsUserMeta.cast(user_meta_list.data)
if user_meta.base_meta.meta_type != pyds.NvDsMetaType.NVDS_TRACKER_PAST_FRAME_META:
continue
past_frame_object_batch = pyds_tracker_meta.NvDsPastFrameObjBatch_cast(user_meta.user_meta_data)
for past_frame_object_stream in pyds_tracker_meta.NvDsPastFrameObjBatch_list(past_frame_object_batch):
streamId = past_frame_object_stream.streamID
# print(' past_frame_object_stream:', past_frame_object_stream)
# print(' streamID:', past_frame_object_stream.streamID)
# print(' surfaceStreamID:', past_frame_object_stream.surfaceStreamID)
tracked_vehicles = []
tracked_people = []
for past_frame_object_list in pyds_tracker_meta.NvDsPastFrameObjStream_list(past_frame_object_stream):
# print(' past_frame_object_list:', past_frame_object_list)
# print(' numObj:', past_frame_object_list.numObj)
# print(' uniqueId:', past_frame_object_list.uniqueId)
# print(' classId:', past_frame_object_list.classId)
# print(' objLabel:', past_frame_object_list.objLabel)
oldest_age = 0
classId = past_frame_object_list.classId
uniqueId = past_frame_object_list.uniqueId
bbox = []
conf = 0.0
counter = 0
for past_frame_object in pyds_tracker_meta.NvDsPastFrameObjList_list(past_frame_object_list):
counter += 1
# print(' past_frame_object:', past_frame_object)
# print(' frameNum:', past_frame_object.frameNum)
# print(' tBbox.left:', past_frame_object.tBbox.left)
# print(' tBbox.width:', past_frame_object.tBbox.width)
# print(' tBbox.top:', past_frame_object.tBbox.top)
# print(' tBbox.right:', past_frame_object.tBbox.height)
# print(' confidence:', past_frame_object.confidence)
# print(' age:', past_frame_object.age)
print('Unique ID',past_frame_object_list.uniqueId,' past frames: ',counter)
try:
user_meta_list = user_meta_list.next
except StopIteration:
break
def process_nvdsanalytics_meta_data(batch_meta):
# Iterate over list of FrameMeta
l_frame = batch_meta.frame_meta_list
# print('======================================================')
while l_frame is not None:
try:
# Casting l_frame.data to ipyds.NvDsFrameMeta
frame_meta = pyds.NvDsFrameMeta.cast(l_frame.data)
l_user = frame_meta.frame_user_meta_list
while l_user is not None:
try:
# Cast to NvDsUserMeta and check it either NvDsAnalyticsFrameMeta or not
user_meta = pyds.NvDsUserMeta.cast(l_user.data)
if user_meta.base_meta.meta_type != pyds.nvds_get_user_meta_type(
"NVIDIA.DSANALYTICSFRAME.USER_META"):
continue
user_meta_analytics = pyds_analytics_meta.NvDsAnalyticsFrameMeta.cast(user_meta.user_meta_data)
except Exception as ex:
print('Exception', ex)
try:
l_user = l_user.next
except StopIteration:
break
except StopIteration:
break
l_obj = frame_meta.obj_meta_list
while l_obj is not None:
try:
frame_meta = pyds.NvDsFrameMeta.cast(l_frame.data)
except StopIteration:
break
frame_number = frame_meta.frame_num
num_rects = frame_meta.num_obj_meta
remove_arr = []
try:
# Casting l_obj.data to pyds.NvDsObjectMeta
obj_meta = pyds.NvDsObjectMeta.cast(l_obj.data)
user_meta_list = obj_meta.obj_user_meta_list
remove = False
while user_meta_list is not None:
try:
user_meta = pyds.NvDsUserMeta.cast(user_meta_list.data)
display_meta = pyds.NvDsUserMeta.cast(user_meta_list.data)
rect_params = obj_meta.rect_params # NvOSD_RectParams *
text_params = obj_meta.text_params # NvOSD_TextParams *
unique_id = obj_meta.object_id
# print('ID: ',unique_id,' text_params', pyds.get_string(text_params.display_text))
user_meta_data = user_meta.user_meta_data
if user_meta.base_meta.meta_type != pyds.nvds_get_user_meta_type(
"NVIDIA.DSANALYTICSOBJ.USER_META"):
continue
user_meta_analytics = pyds_analytics_meta.NvDsAnalyticsObjInfo.cast(
user_meta.user_meta_data)
# print('unique_id:', user_meta_analytics.unique_id)
# print('lcStatus:', user_meta_analytics.lcStatus)
# print('dirStatus:', user_meta_analytics.dirStatus)
# print('ocStatus:', user_meta_analytics.ocStatus)
# print('roiStatus:', user_meta_analytics.roiStatus)
if 'RF' in user_meta_analytics.roiStatus:
remove = True
remove_arr.append(obj_meta)
# print('Remove')
# if remove:
# pyds.nvds_remove_obj_meta_from_frame(frame_meta, obj_meta)
except StopIteration:
break
try:
user_meta_list = user_meta_list.next
except StopIteration:
break
except StopIteration:
break
try:
l_obj = l_obj.next
for obj in remove_arr:
pyds.nvds_remove_obj_meta_from_frame(frame_meta, obj)
# print('REMOVE')
except StopIteration:
break
# Get next FrameMeta in list
try:
l_frame = l_frame.next
except StopIteration:
break
# if batch_meta_decoded[0]["current"]["people_count"]:
# print('batch_meta_decoded', batch_meta_decoded)
def nvdsanalytics_src_pad_buffer_probe(pad, info, u_data):
gst_buffer = info.get_buffer()
if not gst_buffer:
print("Unable to get GstBuffer ")
return
batch_meta = pyds.gst_buffer_get_nvds_batch_meta(hash(gst_buffer))
process_nvdsanalytics_meta_data(batch_meta)
process_tracker_meta_data(batch_meta)
# self.parse_nvdsanalytics_meta_data3(batch_meta)
return Gst.PadProbeReturn.OK
# tiler_sink_pad_buffer_probe will extract metadata received on tiler src pad
# and update params for drawing rectangle, object information etc.
def tiler_sink_pad_buffer_probe(pad,info,u_data):
frame_number=0
num_rects=0
gst_buffer = info.get_buffer()
if not gst_buffer:
print("Unable to get GstBuffer ")
return
# Retrieve batch metadata from the gst_buffer
# Note that pyds.gst_buffer_get_nvds_batch_meta() expects the
# C address of gst_buffer as input, which is obtained with hash(gst_buffer)
batch_meta = pyds.gst_buffer_get_nvds_batch_meta(hash(gst_buffer))
l_frame = batch_meta.frame_meta_list
while l_frame is not None:
try:
# Note that l_frame.data needs a cast to pyds.NvDsFrameMeta
# The casting is done by pyds.NvDsFrameMeta.cast()
# The casting also keeps ownership of the underlying memory
# in the C code, so the Python garbage collector will leave
# it alone.
frame_meta = pyds.NvDsFrameMeta.cast(l_frame.data)
except StopIteration:
break
frame_number=frame_meta.frame_num
l_obj=frame_meta.obj_meta_list
num_rects = frame_meta.num_obj_meta
is_first_obj = True
save_image = False
obj_counter = {
PGIE_CLASS_ID_VEHICLE:0,
PGIE_CLASS_ID_PERSON:0,
PGIE_CLASS_ID_BICYCLE:0,
PGIE_CLASS_ID_ROADSIGN:0
}
while l_obj is not None:
try:
# Casting l_obj.data to pyds.NvDsObjectMeta
obj_meta=pyds.NvDsObjectMeta.cast(l_obj.data)
except StopIteration:
break
obj_counter[obj_meta.class_id] += 1
# Periodically check for objects with borderline confidence value that may be false positive detections.
# If such detections are found, annoate the frame with bboxes and confidence value.
# Save the annotated frame to file.
if((saved_count["stream_"+str(frame_meta.pad_index)]%30==0) and (obj_meta.confidence>0.3 and obj_meta.confidence<0.31)):
if is_first_obj:
is_first_obj = False
# Getting Image data using nvbufsurface
# the input should be address of buffer and batch_id
n_frame=pyds.get_nvds_buf_surface(hash(gst_buffer),frame_meta.batch_id)
#convert python array into numy array format.
frame_image=np.array(n_frame,copy=True,order='C')
#covert the array into cv2 default color format
frame_image=cv2.cvtColor(frame_image,cv2.COLOR_RGBA2BGRA)
save_image = True
frame_image=draw_bounding_boxes(frame_image,obj_meta,obj_meta.confidence)
try:
l_obj=l_obj.next
except StopIteration:
break
# print("Frame Number=", frame_number, "Number of Objects=",num_rects,"Vehicle_count=",obj_counter[PGIE_CLASS_ID_VEHICLE],"Person_count=",obj_counter[PGIE_CLASS_ID_PERSON])
# Get frame rate through this probe
fps_streams["stream{0}".format(frame_meta.pad_index)].get_fps()
if save_image:
cv2.imwrite(folder_name+"/stream_"+str(frame_meta.pad_index)+"/frame_"+str(frame_number)+".jpg",frame_image)
saved_count["stream_"+str(frame_meta.pad_index)]+=1
try:
l_frame=l_frame.next
except StopIteration:
break
return Gst.PadProbeReturn.OK
def draw_bounding_boxes(image,obj_meta,confidence):
confidence='{0:.2f}'.format(confidence)
rect_params=obj_meta.rect_params
top=int(rect_params.top)
left=int(rect_params.left)
width=int(rect_params.width)
height=int(rect_params.height)
obj_name=pgie_classes_str[obj_meta.class_id]
image=cv2.rectangle(image,(left,top),(left+width,top+height),(0,0,255,0),2)
# Note that on some systems cv2.putText erroneously draws horizontal lines across the image
image=cv2.putText(image,obj_name+',C='+str(confidence),(left-10,top-10),cv2.FONT_HERSHEY_SIMPLEX,0.5,(0,0,255,0),2)
return image
def cb_newpad(decodebin, decoder_src_pad,data):
print("In cb_newpad\n")
caps=decoder_src_pad.get_current_caps()
gststruct=caps.get_structure(0)
gstname=gststruct.get_name()
source_bin=data
features=caps.get_features(0)
# Need to check if the pad created by the decodebin is for video and not
# audio.
if(gstname.find("video")!=-1):
# Link the decodebin pad only if decodebin has picked nvidia
# decoder plugin nvdec_*. We do this by checking if the pad caps contain
# NVMM memory features.
if features.contains("memory:NVMM"):
# Get the source bin ghost pad
bin_ghost_pad=source_bin.get_static_pad("src")
if not bin_ghost_pad.set_target(decoder_src_pad):
sys.stderr.write("Failed to link decoder src pad to source bin ghost pad\n")
else:
sys.stderr.write(" Error: Decodebin did not pick nvidia decoder plugin.\n")
def decodebin_child_added(child_proxy,Object,name,user_data):
print("Decodebin child added:", name, "\n")
if(name.find("decodebin") != -1):
Object.connect("child-added",decodebin_child_added,user_data)
if(is_aarch64() and name.find("nvv4l2decoder") != -1):
print("Seting bufapi_version\n")
Object.set_property("bufapi-version",True)
def create_source_bin(index,uri):
print("Creating source bin")
# Create a source GstBin to abstract this bin's content from the rest of the
# pipeline
bin_name="source-bin-%02d" %index
print(bin_name)
nbin=Gst.Bin.new(bin_name)
if not nbin:
sys.stderr.write(" Unable to create source bin \n")
# Source element for reading from the uri.
# We will use decodebin and let it figure out the container format of the
# stream and the codec and plug the appropriate demux and decode plugins.
uri_decode_bin=Gst.ElementFactory.make("uridecodebin", "uri-decode-bin")
if not uri_decode_bin:
sys.stderr.write(" Unable to create uri decode bin \n")
# We set the input uri to the source element
uri_decode_bin.set_property("uri",uri)
# Connect to the "pad-added" signal of the decodebin which generates a
# callback once a new pad for raw data has beed created by the decodebin
uri_decode_bin.connect("pad-added",cb_newpad,nbin)
uri_decode_bin.connect("child-added",decodebin_child_added,nbin)
# We need to create a ghost pad for the source bin which will act as a proxy
# for the video decoder src pad. The ghost pad will not have a target right
# now. Once the decode bin creates the video decoder and generates the
# cb_newpad callback, we will set the ghost pad target to the video decoder
# src pad.
Gst.Bin.add(nbin,uri_decode_bin)
bin_pad=nbin.add_pad(Gst.GhostPad.new_no_target("src",Gst.PadDirection.SRC))
if not bin_pad:
sys.stderr.write(" Failed to add ghost pad in source bin \n")
return None
return nbin
def main(args):
# Check input arguments
if len(args) < 2:
sys.stderr.write("usage: %s <uri1> [uri2] ... [uriN] <folder to save frames>\n" % args[0])
sys.exit(1)
for i in range(0,len(args)-2):
fps_streams["stream{0}".format(i)]=GETFPS(i)
number_sources=len(args)-2
global folder_name
folder_name=args[-1]
if path.exists(folder_name):
sys.stderr.write("The output folder %s already exists. Please remove it first.\n" % folder_name)
sys.exit(1)
os.mkdir(folder_name)
print("Frames will be saved in ",folder_name)
# Standard GStreamer initialization
GObject.threads_init()
Gst.init(None)
# Create gstreamer elements */
# Create Pipeline element that will form a connection of other elements
print("Creating Pipeline \n ")
pipeline = Gst.Pipeline()
is_live = False
if not pipeline:
sys.stderr.write(" Unable to create Pipeline \n")
print("Creating streamux \n ")
# Create nvstreammux instance to form batches from one or more sources.
streammux = Gst.ElementFactory.make("nvstreammux", "Stream-muxer")
if not streammux:
sys.stderr.write(" Unable to create NvStreamMux \n")
# Set properties of tracker
config = configparser.ConfigParser()
config.read('dstest2_tracker_config.txt')
config.sections()
# Tracker
tracker = Gst.ElementFactory.make("nvtracker", "tracker")
if not tracker:
sys.stderr.write(" Unable to create tracker \n")
for key in config['tracker']:
if key == 'tracker-width':
tracker_width = config.getint('tracker', key)
tracker.set_property('tracker-width', tracker_width)
if key == 'tracker-height':
tracker_height = config.getint('tracker', key)
tracker.set_property('tracker-height', tracker_height)
if key == 'gpu-id':
tracker_gpu_id = config.getint('tracker', key)
tracker.set_property('gpu_id', tracker_gpu_id)
if key == 'll-lib-file':
tracker_ll_lib_file = config.get('tracker', key)
tracker.set_property('ll-lib-file', tracker_ll_lib_file)
if key == 'll-config-file':
tracker_ll_config_file = config.get('tracker', key)
tracker.set_property('ll-config-file', tracker_ll_config_file)
if key == 'enable-batch-process':
tracker_enable_batch_process = config.getint('tracker', key)
tracker.set_property('enable_batch_process', tracker_enable_batch_process)
tracker.set_property('enable-past-frame', 1)
# nvdsAnalytics
analytics = Gst.ElementFactory.make("nvdsanalytics", "analytics")
if not analytics:
sys.stderr.write(" Unable to create analytics \n")
# Set properties of tracker
config = configparser.ConfigParser()
config.read("config_nvdsanalytics.txt")
config.sections()
print('config', config)
# "config-file", "config_nvdsanalytics.txt",
analytics.set_property("config-file", "config_nvdsanalytics.txt")
if not tracker:
sys.stderr.write(" Unable to create tracker \n")
pipeline.add(streammux)
for i in range(number_sources):
os.mkdir(folder_name+"/stream_"+str(i))
frame_count["stream_"+str(i)]=0
saved_count["stream_"+str(i)]=0
print("Creating source_bin ",i," \n ")
uri_name=args[i+1]
if uri_name.find("rtsp://") == 0 :
is_live = True
source_bin=create_source_bin(i, uri_name)
if not source_bin:
sys.stderr.write("Unable to create source bin \n")
pipeline.add(source_bin)
padname="sink_%u" %i
sinkpad= streammux.get_request_pad(padname)
if not sinkpad:
sys.stderr.write("Unable to create sink pad bin \n")
srcpad=source_bin.get_static_pad("src")
if not srcpad:
sys.stderr.write("Unable to create src pad bin \n")
srcpad.link(sinkpad)
print("Creating Pgie \n ")
pgie = Gst.ElementFactory.make("nvinfer", "primary-inference")
if not pgie:
sys.stderr.write(" Unable to create pgie \n")
# Add nvvidconv1 and filter1 to convert the frames to RGBA
# which is easier to work with in Python.
print("Creating nvvidconv1 \n ")
nvvidconv1 = Gst.ElementFactory.make("nvvideoconvert", "convertor1")
if not nvvidconv1:
sys.stderr.write(" Unable to create nvvidconv1 \n")
print("Creating filter1 \n ")
caps1 = Gst.Caps.from_string("video/x-raw(memory:NVMM), format=RGBA")
filter1 = Gst.ElementFactory.make("capsfilter", "filter1")
if not filter1:
sys.stderr.write(" Unable to get the caps filter1 \n")
filter1.set_property("caps", caps1)
print("Creating tiler \n ")
tiler=Gst.ElementFactory.make("nvmultistreamtiler", "nvtiler")
if not tiler:
sys.stderr.write(" Unable to create tiler \n")
print("Creating nvvidconv \n ")
nvvidconv = Gst.ElementFactory.make("nvvideoconvert", "convertor")
if not nvvidconv:
sys.stderr.write(" Unable to create nvvidconv \n")
print("Creating nvosd \n ")
nvosd = Gst.ElementFactory.make("nvdsosd", "onscreendisplay")
if not nvosd:
sys.stderr.write(" Unable to create nvosd \n")
if(is_aarch64()):
print("Creating transform \n ")
transform=Gst.ElementFactory.make("nvegltransform", "nvegl-transform")
if not transform:
sys.stderr.write(" Unable to create transform \n")
print("Creating EGLSink \n")
sink = Gst.ElementFactory.make("nveglglessink", "nvvideo-renderer")
if not sink:
sys.stderr.write(" Unable to create egl sink \n")
if is_live:
print("Atleast one of the sources is live")
streammux.set_property('live-source', 1)
streammux.set_property('width', 1920)
streammux.set_property('height', 1080)
streammux.set_property('batch-size', number_sources)
streammux.set_property('batched-push-timeout', 4000000)
pgie.set_property('config-file-path', "dstest_imagedata_config.txt")
pgie_batch_size=pgie.get_property("batch-size")
if(pgie_batch_size != number_sources):
print("WARNING: Overriding infer-config batch-size",pgie_batch_size," with number of sources ", number_sources," \n")
pgie.set_property("batch-size",number_sources)
tiler_rows=int(math.sqrt(number_sources))
tiler_columns=int(math.ceil((1.0*number_sources)/tiler_rows))
tiler.set_property("rows",tiler_rows)
tiler.set_property("columns",tiler_columns)
tiler.set_property("width", TILED_OUTPUT_WIDTH)
tiler.set_property("height", TILED_OUTPUT_HEIGHT)
sink.set_property("sync", 0)
if not is_aarch64():
# Use CUDA unified memory in the pipeline so frames
# can be easily accessed on CPU in Python.
mem_type = int(pyds.NVBUF_MEM_CUDA_UNIFIED)
streammux.set_property("nvbuf-memory-type", mem_type)
nvvidconv.set_property("nvbuf-memory-type", mem_type)
nvvidconv1.set_property("nvbuf-memory-type", mem_type)
tiler.set_property("nvbuf-memory-type", mem_type)
print("Adding elements to Pipeline \n")
pipeline.add(pgie)
pipeline.add(tracker)
pipeline.add(analytics)
pipeline.add(tiler)
pipeline.add(nvvidconv)
pipeline.add(filter1)
pipeline.add(nvvidconv1)
pipeline.add(nvosd)
if is_aarch64():
pipeline.add(transform)
if is_aarch64():
pipeline.add(transform)
pipeline.add(sink)
print("Linking elements in the Pipeline \n")
streammux.link(pgie)
pgie.link(tracker)
tracker.link(analytics)
analytics.link(nvvidconv1)
nvvidconv1.link(filter1)
filter1.link(tiler)
tiler.link(nvvidconv)
nvvidconv.link(nvosd)
if is_aarch64():
nvosd.link(transform)
transform.link(sink)
else:
nvosd.link(sink)
# create an event loop and feed gstreamer bus mesages to it
loop = GObject.MainLoop()
bus = pipeline.get_bus()
bus.add_signal_watch()
bus.connect ("message", bus_call, loop)
tiler_sink_pad=tiler.get_static_pad("sink")
if not tiler_sink_pad:
sys.stderr.write(" Unable to get src pad \n")
else:
tiler_sink_pad.add_probe(Gst.PadProbeType.BUFFER, tiler_sink_pad_buffer_probe, 0)
nvdsanalytics_src_pad = analytics.get_static_pad("src")
# nvdsanalytics_src_pad = gst_element_get_static_pad(nvdsanalytics, "src");
if not nvdsanalytics_src_pad:
sys.stderr.write(" Unable to get src pad \n")
else:
nvdsanalytics_src_pad.add_probe(Gst.PadProbeType.BUFFER, nvdsanalytics_src_pad_buffer_probe, 0)
# List the sources
print("Now playing...")
for i, source in enumerate(args[:-1]):
if (i != 0):
print(i, ": ", source)
print("Starting pipeline \n")
# start play back and listed to events
pipeline.set_state(Gst.State.PLAYING)
try:
loop.run()
except:
pass
# cleanup
print("Exiting app\n")
pipeline.set_state(Gst.State.NULL)
if __name__ == '__main__':
sys.exit(main(sys.argv))
Console printout : (Expected to see no Unique ID and past frame as ROI covers whole screen)
Decodebin child added: decodebin0
test-app.zip (61.9 KB)
Decodebin child added: rtph264depay0
Decodebin child added: h264parse0
Decodebin child added: capsfilter0
Decodebin child added: nvv4l2decoder0
Seting bufapi_version
Opening in BLOCKING MODE
NvMMLiteOpen : Block : BlockType = 261
NVMEDIA: Reading vendor.tegra.display-size : status: 6
NvMMLiteBlockCreate : Block : BlockType = 261
In cb_newpad
Unique ID 0 past frames: 3
**********************FPS*****************************************
Fps of stream 0 is 16.8
Unique ID 1 past frames: 3
**********************FPS*****************************************
Fps of stream 0 is 23.2
**********************FPS*****************************************
Fps of stream 0 is 24.8
**********************FPS*****************************************
Fps of stream 0 is 25.8
**********************FPS*****************************************
Fps of stream 0 is 24.4
**********************FPS*****************************************
Fps of stream 0 is 24.4
Unique ID 2 past frames: 3
**********************FPS*****************************************
Fps of stream 0 is 25.4
**********************FPS*****************************************
Fps of stream 0 is 25.2
**********************FPS*****************************************
Fps of stream 0 is 26.0
^CExiting app
Regards Andrew