Hi, I am trying using client.
Gstreamer basic real time streaming tutorial
But it only shows me the blank window named "CV Video Client". I confirmed that the IP address and port number are correct. Please assist me. HI kcyeong92, Have setup OpenCv very well? You can also check your input.
Thanks for your reply. I just copied, pasted and compiled the client. Then I ran the executable file.
UDP Unicast and Multicast Streaming Video using the Beaglebone Black
May I know how to check the video input? I can view the video stream via web browser. In edi-cam server, ffmpeg is used to encode video to MPEG1 whereas jsmpeg is used to decode the video. The video is rendered onto canvas element in the web browser. I am wondering is it the reason openCV can't detect the video. Because I'm using different libraries. I will add a readme later but before i should recommend you to read this link multiple streams.
Thank for your notification. Thanks for the code! The client code returns an error:. Thanks for the code. If I have to change this to UDP mode, please suggest the necessary changes.
How can we configure our socket to UDP mode? I try to compile the code with cygwin on windows 7, but nothing works. Could you tell me which compiler I need to use? Other thing you should be concerned is that a UDP packet size is considerably smaller than the whole frame size sent in TCP. Therefore, you must divide the frame in small UDP packets.
Maybe have a look at Telepathy before you reinvent the whole wheel. Thelepathy uses xmpp protocol but my server protocol was designed by base sockets so i need a media streamer library based on absolute sockets. Unencrypted video and audio stream over the network. I hope you are talking about a private LAN otherwise the internet is not a place to do this stuff.
Sooner ot later You will run into problems with multimedia in Qt.Stream the DrivePro 200 to your computer
June 29, by Matthew Rossi. Port forwarding is essential to making your security DVR or NVR accessible from online using either your computer or mobile device. It is a configuration setting in your router that must be set properly in order to view your security camera system from the internet.
We commonly hear from customers the complaint that they are able to see their video recorder from a computer on the same router, but not from their phone or from a computer at another location. Here's a brief explanation of why this happens:.
Every router these days has a built-in firewall which blocks traffic from the internet from accessing the internal local network behind the router. The firewall will not block local traffic on the network from accessing the DVR, so you will still be able to view your camera system as long as you are at home and on the same network as the DVR.
Unless you enable port forwarding in your router you will not be able to view your cameras from elsewhere or from your phone using its cellular data connection.
Depending on the manufacturer of your surveillance video recorder, it will use specific ports for web login, data communication, and video streaming to serve up the camera feed. All of our recorders have the following default ports configured when they ship:. It is only necessary if you want to be able to view the login webpage.
Port - This is a TCP type video streaming port that is necessary for viewing video using any method, i. RTSP is an advanced feature that allows integration of camera streams coming to the DVR to be connected to another device, like a access control system or for embedding video on a website. For our video recorders, at a minimum you must enable port forwarding rules for ports 80 and for remote viewing to work smoothly. One port rule for port 80and one rule for port If you have a residential internet service plan, chances are port 80 is being blocked by your ISP.
In such an event, you will make a rule for port or something similar instead of port As long as you configure everything correctly in both the DVR and your router, everything should work fine. The first thing you should do when configuring port forwarding is determine all of your network information. This means IP addresses, login credentials, port numbers needed for your DVR, all of which is essential information. We will go over what these pieces of information are, and the easiest ways to find them.
But it seems that it is not working. I have not seen any packet on udp port and video is stopped in autovideosink. May be I have missed something. Please suggest. Here is the code:. SGaist I am using instances like:. What exactly is "not working"?
You have to give details, "not working" doesn't explain anything useful. You can see the status of the different backends in the wiki. It provides everything you need to show on a widget and stream at the same time.
You'll just have to modify your gst pipeline a bit for that. For the sake of simplicity I'm not working with the frame as I guess it needs to be converted to some appropriate format i. It is not working on QT Well, maybe it's a good reason to update your Qt version Best regards. Qt Forum.These posts are available here:. The problem with these solutions is that they are using VLC to display the video and you are effectively without any type of control of the application.
For example, If you wished to build a robot navigation system that streams video to the control panel then it would not be possible to modify the VLC user interface very easily.
So this post covers the area of building your own application to view the video streams. You could try and do this from first principles, but that is much too big a task; instead, you are better building on what is currently available. LibVLC is an incredibly comprehensive and accessible code library for all of the features that are present in the cross-platform VLC multimedia player. It would be great if we can take advantage of this library as it includes all of code necessary to decode video streams, deal with network sockets etc.
And we can! To make life easy I would recommend using the pre-built versions. You can go back a few levels on that URL to check if there are more recent versions and to find the version for your platform. The great thing about open source is that someone has probably tried to do what you are looking to do before and has written some code. The downside is often that solutions are not well packaged and often need customisation to work with recent libraries. I have tried several, but had particular success with these two:.
The reason I selected both of these is that I was able to download the source code for both and was able to recompile them from source under Windows.
And, it is freely available. For more information on Qt — see this link. So, the directory looks like:. So, in this folder we now have all of the libraries that are needed for the Qt project. You can see in the lib folder the. Opening this within QtCreator gives the following output as displayed in Figure 1. Modify the headers of the.
So, my adapted source files look like this:. This is particularly useful for cross-compilation where you can compile applications directly for the Beaglebone. I covered this in my video series on Qt and the Beaglebone. You can see my configuration in Figure 2. At this point you should have a successful build, but it is unlikely that your application will run unless you have made all of the run time dlls available under Windows for your application.
The best way to do this is to make sure you add all of the required dlls to your path so that they can be found on execution. You can add the other directories to your path here, but I am going to just place the dlls in the build folder. The plugins folder is very important as it contains further dlls that are used by your build. Okay, after this you should now have an executing version of the demo-player project within QtCreator. Simply press the green play button on the bottom left.
My output is captured in Figure 6. In my case everything is working fine. So, that is it. I have just added a high-resolution capture of my application running almost full screen and streaming live video at 30 frames per second in Figure 8.
I will have a video soon available of my blog series on streaming video in place soon. When it is I will link everything together. If you built a device to run object tracking, would you enable a videoplayer to run on the beaglebone or just use wireless streaming as in your example to view the tracking and even record the stream onto the home pc, when its online?
Which does beg another another question or connecting to the stream in daytime hrs but leaving the BBB to do its capture and opencv processing separately.I found a blog that has demonstrated that they can run a smooth, low latency video stream from the beaglebone using a Logitech c to a PC running linux using the gstreamer program.
I downloaded the most recent version of qt project 5. My goal is to create a basic application that can play video from the beaglebone.
The next step was to install gstreamer libraries and other equipment. I found a forum post that recommended this command, which allowed me to compile my program:. It has a great set of examples and explanations. One of the best parts is the ability to directly input a gstreamer pipeline into a function as a string:.
I can use the same Gstreamer command that the quadworkshop blog used to display video from a terminal window as a string: pipe1Descr. That has to be entered as its own string variable, which is demonstrated in this example. It basically just streams video. My code is here.
To run the example from Qt Creatoropen the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example. To give the application playlist capability we also use a QPlayList object. To activate the various functions such as play and stop on the dialog, the button clicked events emit the play and stop signals, which are connected to the play and stop slots of QMediaPlayer.
The example also allows us to change various video properties by means of the QVideoWidget object. We can go to Full Screen mode with a single button click, and back again.
Or if we press the "Color Options" dialog button we can have access to more subtle influences. The dialog has a set of sliders so that we can change the brightness, contrast, hue and saturation of the video being watched. The connect statements are in pairs so that changes to either the user interface widget the relevant slider or the QVideoWidget object will update the other object.
Example project code. Documentation contributions included herein are the copyrights of their respective owners. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners. Contents Running the Example. Media Player Example Playing audio and video.