Hi,
I am trying to build an RTSP server to stream the output from two RTSP cameras.
But when I run the code everything seems to work fine, but when I try to fetch the stream from the server with either VLC or OpenCV (entering rtsp://localhost:8554/test), I get an error.
I am fairly new to Gstreamer and tried multiple adjustments in the pipeline but without luck.
VLC says:
- VLC is unable to open the MRL ‘rtsp://localhost:8554/test’.
- VLC could not connect to ‘rtsp://localhost:8554/test’.
OpenCV says:
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (1757) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module source reported: Could not read from resource.
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (886) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ERROR:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap.cpp (116) open VIDEOIO(CV_IMAGES): raised OpenCV exception:
OpenCV(4.1.1) /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can’t find starting number (in the name of file): rtsp://localhost:8554/test in function ‘icvExtractPattern’
Can someone help me?
Thanks in advance!
Here is the code that I use:
import sys
sys.path.append(’…/’)
import gi
gi.require_version('Gst', '1.0')
gi.require_version('GstRtspServer', '1.0')
from gi.repository import GObject, Gst, GstRtspServer
from gi.repository import GLib
from ctypes import *
import time
import cv2
import sys
import math
import platform
from streamer.common.is_aarch_64 import is_aarch64
from streamer.common.bus_call import bus_call
from streamer.common.FPS import GETFPS
import pyds
from utils import cprint
fps_streams={}
MAX_DISPLAY_LEN=64
PGIE_CLASS_ID_VEHICLE = 0
PGIE_CLASS_ID_BICYCLE = 1
PGIE_CLASS_ID_PERSON = 2
PGIE_CLASS_ID_ROADSIGN = 3
MUXER_OUTPUT_WIDTH=1920
MUXER_OUTPUT_HEIGHT=1080
MUXER_BATCH_TIMEOUT_USEC=4000000
TILED_OUTPUT_WIDTH=1280
TILED_OUTPUT_HEIGHT=720
GST_CAPS_FEATURES_NVMM="memory:NVMM"
OSD_PROCESS_MODE= 0
OSD_DISPLAY_TEXT= 0
# tiler_sink_pad_buffer_probe will extract metadata received on OSD sink pad
# and update params for drawing rectangle, object information etc.
class RTSP_stream:
def __init__(self):
self.is_playing = False
pass
def cb_newpad(self, 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.
print("gstname=",gstname)
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.
print("features=",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(self, child_proxy,Object,name,user_data):
print("Decodebin child added:", name, "\n")
if(name.find("decodebin") != -1):
Object.connect("child-added",self.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(self, 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",self.cb_newpad,nbin)
uri_decode_bin.connect("child-added",self.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 setup(self, args):
# Check input arguments
if len(args) < 2:
sys.stderr.write("usage: %s <uri1> [uri2] ... [uriN]\n" % args[0])
sys.exit(1)
for i in range(0,len(args)-1):
fps_streams["stream{0}".format(i)]=GETFPS(i)
number_sources=len(args)-1
# 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 ")
self.pipeline = Gst.Pipeline()
is_live = False
if not self.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:
self.pipeline.set_state(Gst.State.NULL)
cprint.prRed("unable to create streammux. is the camera in use?")
glbobj.shutdown("unable to create streammux")
self.pipeline.add(streammux)
for i in range(number_sources-1):
print("Creating source_bin ",i," \n ")
uri_name=args[i+1]
if uri_name.find("rtsp://") == 0 :
is_live = True
print(uri_name.find("rtsp://"))
source_bin=self.create_source_bin(i, uri_name)
if not source_bin:
sys.stderr.write("Unable to create source bin \n")
self.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)
if is_live:
print("Atle1ast one of the sources is live")
streammux.set_property('live-source', 1)
streammux.set_property('width', int(1920))
streammux.set_property('height', int(1080))
streammux.set_property('batch-size', number_sources)
streammux.set_property('batched-push-timeout', 4000000)
# streammux.set_property('enable-padding', 1)
queue1=Gst.ElementFactory.make("queue","queue1")
queue3=Gst.ElementFactory.make("queue","queue3")
queue4=Gst.ElementFactory.make("queue","queue4")
queue5=Gst.ElementFactory.make("queue","queue5")
self.pipeline.add(queue1)
self.pipeline.add(queue3)
self.pipeline.add(queue4)
self.pipeline.add(queue5)
print("Creating tiler \n ")
self.tiler=Gst.ElementFactory.make("nvmultistreamtiler", "nvtiler") # tiler can switch between input sources
if not self.tiler:
sys.stderr.write(" Unable to create tiler \n")
tiler_rows=int(math.sqrt(number_sources))
tiler_columns=int(math.ceil((1.0*number_sources)/tiler_rows))
self.tiler.set_property("rows",tiler_rows)
self.tiler.set_property("columns",tiler_columns)
self.tiler.set_property("show-source", 1)
self.tiler.set_property("width", TILED_OUTPUT_WIDTH)
self.tiler.set_property("height", TILED_OUTPUT_HEIGHT)
# Since the data format in the input file is elementary h264 stream,
# we need a h264parser
print("Creating H264Parser \n")
h264parser = Gst.ElementFactory.make("h264parse", "h264-parser")
if not h264parser:
sys.stderr.write(" Unable to create h264 parser \n")
# Use convertor to convert from NV12 to RGBA as required by nvosd
nvvidconv = Gst.ElementFactory.make("nvvideoconvert", "convertor")
if not nvvidconv:
sys.stderr.write(" Unable to create nvvidconv \n")
#Create a caps filter
caps = Gst.ElementFactory.make("capsfilter", "filter")
caps.set_property("caps", Gst.Caps.from_string("video/x-raw(memory:NVMM), format=I420"))
# Make the h264 encoder
encoder = Gst.ElementFactory.make("nvv4l2h264enc", "encoder")
print("Creating H264 Encoder")
if not encoder:
sys.stderr.write(" Unable to create encoder")
encoder.set_property('bitrate', 4000000)
if is_aarch64():
transform=Gst.ElementFactory.make("nvegltransform", "nvegl-transform")
encoder.set_property('preset-level', 1)
encoder.set_property('insert-sps-pps', 1)
encoder.set_property('bufapi-version', 1)
# Make the payload-encode video into RTP packets
rtppay = Gst.ElementFactory.make("rtph264pay", "rtppay")
print("Creating H264 rtppay")
if not rtppay:
sys.stderr.write(" Unable to create rtppay")
# Make the UDP sink
updsink_port_num = 5400
sink = Gst.ElementFactory.make("udpsink", "udpsink")
if not sink:
sys.stderr.write(" Unable to create udpsink")
sink.set_property('host', '224.224.255.255')
sink.set_property('port', updsink_port_num)
sink.set_property('async', False)
sink.set_property('sync', 1)
print("Adding elements to Pipeline \n")
# self.pipeline.add(h264parser)
self.pipeline.add(self.tiler)
self.pipeline.add(nvvidconv)
self.pipeline.add(caps)
self.pipeline.add(encoder)
self.pipeline.add(rtppay)
self.pipeline.add(sink)
# link alle elementen
print("Linking elements in the Pipeline \n")
streammux.link(queue1)
queue1.link(self.tiler)
self.tiler.link(nvvidconv)
nvvidconv.link(queue4)
queue4.link(caps)
caps.link(encoder)
encoder.link(rtppay)
rtppay.link(queue5)
queue5.link(sink)
# create an event loop and feed gstreamer bus mesages to it
self.loop = GObject.MainLoop()
self.bus = self.pipeline.get_bus()
self.bus.add_signal_watch()
self.bus.connect ("message", bus_call, self.loop)
rtsp_port_num = 8554
server = GstRtspServer.RTSPServer.new()
server.props.service = "%d" % rtsp_port_num
server.attach(None)
factory = GstRtspServer.RTSPMediaFactory.new()
factory.set_launch( "( udpsrc name=pay0 port=%d buffer-size=524288 caps=\"application/x-rtp, media=video, clock-rate=90000, encoding-name=(string)%s, payload=96, h264parse \" )" % (updsink_port_num, "H264"))
factory.set_shared(True)
server.get_mount_points().add_factory("/test", factory)
print("\n *** DeepStream: Launched RTSP Streaming at rtsp://localhost:%d/test ***\n\n" % rtsp_port_num)
# List the sources
print("Now playing...")
for i, source in enumerate(args):
if (i != 0):
print(i, ": ", source)
print("Starting pipeline \n")
# start play back and listed to events
self.pipeline.set_state(Gst.State.PLAYING)