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There are two solution for this: to adjust frame size to such resolution that will fit to the single UDP packet or to split single video frame to multiply UDP packets. This exceeds maximum UDP payload (65507 B – see ). Why? Because GStreamer tries to pack each video frame into single UDP packet and the single video frame size which here is:ġ280 x 720 x 12bit per pikssel in I420 format = 1382400B Reason: Error sending message: Message too long Gstmultiudpsink.c(714): gst_multiudpsink_send_messages (): /GstPipeline:pipeline0/GstUDPSink:udpsink0: You will see something like this: WARNING: from element /GstPipeline:pipeline0/GstUDPSink:udpsink0: Attempting to send a UDP packets larger than maximum size (1382400 > 65507) Unfortunately, constructed above GStreamer command won’t work if you set video resolution too high. Properties specify destination port and IP address. The last element takes video stream and pack it into UDP packets. You can query your camera capabilities with the following $ v4l2-ctl -list-formats-ext -device=/dev/video0 This element is optional here – without it GStreamer will take default camera settings. Then in our pipeline there is a filter element which has properties which specifies the format of captured video stream. You can see cameras attached to your Raspberry Pi with the $ v4l2-ctl -list-devices It has property “device” which specifies which camera we want to use. In GStreamer there is v4l2src element which does the job. To capture video in linux-based systems usually Video4Linux2 API is used, and our case isn’t an exception. So, let’s try to construct one of the simplest possible $ gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw, format=I420, width=1280, height=720, framerate=30/1 ! udpsink host=192.168.0.158 port=5002 In gst-launch command elements are connected with ‘!’ mark. These elements have pads (sources or sinks) which are used to link them together to pass stream data to from one to another. GStreamer pipeline consists of elements which do basic operations on the media stream. GStreamer is based on a concept of pipelining.
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Install gstreamer raspberry pi stretch install#
However, to be able to start video streaming we need yet to install gst-launch program, which is not included in the official $ sudo apt-get install gstreamer1.0-tools
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OS distribution which I am using arleady contains all needed GStreamer shared libraries. I am using Microsoft LifeCam HD-6000 USB webcam. Camera (can be any USB webcam or Raspberry Pi camera module).Working Ethernet or WiFi connection on this board.I am using Raspberry Pi 3 Model B with Raspbian Stretch operating system installed.