How to make Xaiver stream camera feed to vlc through network

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

This is my camera board:
[url]Four Synchronized 4K Cameras for NVIDIA® Jetson AGX Xavier™

So I can stream using:

CLIENT_IP=<IP_ADDRESS>
gst-launch-1.0 -e nvarguscamerasrc ! ‘video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)NV12, framerate=(fraction)30/1’
! nvvidconv ! ‘video/x-raw(memory:NVMM), format=(string)I420’ ! omxh264enc control-rate=2 bitrate=4000000 ! ‘video/x-h264, stream-format=(string)byte-stream’
! h264parse ! rtph264pay mtu=1400 ! udpsink host=$CLIENT_IP port=5000 sync=false async=false

I can get the video feed with this command:
gst-launch-1.0 udpsrc port=5000 ! application/x-rtp,encoding-name=H264,payload=96 ! rtph264depay ! h264parse ! queue ! avdec_h264 ! xvimagesink sync=false async=false -e

I want to know how can I get the video feed from VLC. Say with the command udp://:
I tried the vlc command and it doesn’t find anything. Could anyone give me some insights?

2

Hi,
Not sure but it seems not supported. Here is a relevant post.

You may try rtsp.
[url]https://devtalk.nvidia.com/default/topic/1018689/jetson-tx2/vlc-playing-gstreamer-flow/post/5187270/#5187270[/url]

3

Hey Dane, thanks for getting back to me. The post was helpful.

I used this command in the end and VLC worked with rtsp:

./test-launch “nvarguscamerasrc sensor-id=0 ! video/x-raw(memory:NVMM),width=(int)340,height=(int)280,format=(string)NV12,framerate=20/1 ! nvvidconv ! omxh265enc bitrate=500000 SliceIntraRefreshEnable=true ! rtph265pay name=pay0 pt=96”

However I don’t quite understand why there is a ~0.5 second lag as compared to the gst-launch command even though I am streaming through my local network and there is little network latency. Perhaps the the udpsink just makes it faster? How could I reduce the lag?

Also below is the output after running the ./test-launch command:

Framerate set to : 20 at NvxVideoEncoderSetParameterNvMMLiteOpen : Block : BlockType = 8 
===== NVMEDIA: NVENC =====
NvMMLiteBlockCreate : Block : BlockType = 8 
NVMEDIA: H265 : Profile : 1 
GST_ARGUS: Creating output stream
CONSUMER: Waiting until producer is connected...
GST_ARGUS: Available Sensor modes :
GST_ARGUS: 1920 x 1080 FR = 29.999999 fps Duration = 33333334 ; Analog Gain range min 1.000000, max 31.622776; Exposure Range min 450000, max 400000000;

GST_ARGUS: 1920 x 1080 FR = 59.999999 fps Duration = 16666667 ; Analog Gain range min 1.000000, max 31.622776; Exposure Range min 450000, max 400000000;

GST_ARGUS: 1920 x 1080 FR = 120.000005 fps Duration = 8333333 ; Analog Gain range min 1.000000, max 31.622776; Exposure Range min 450000, max 400000000;

GST_ARGUS: 1280 x 720 FR = 59.999999 fps Duration = 16666667 ; Analog Gain range min 1.000000, max 31.622776; Exposure Range min 450000, max 400000000;

GST_ARGUS: 1280 x 720 FR = 120.000005 fps Duration = 8333333 ; Analog Gain range min 1.000000, max 31.622776; Exposure Range min 450000, max 400000000;

GST_ARGUS: Running with following settings:
   Camera index = 0 
   Camera mode  = 4 
   Output Stream W = 1280 H = 720 
   seconds to Run    = 0 
   Frame Rate = 120.000005 
GST_ARGUS: PowerService: requested_clock_Hz=833000
GST_ARGUS: Setup Complete, Starting captures for 0 seconds
GST_ARGUS: Starting repeat capture requests.
CONSUMER: Producer has connected; continuing.

Thanks

4

Hi,
We can configure ‘latency’ if you use rtspsrc. You may refer to this post.

Not sure but there might be similar control for VLC. Other users can share their experiences.