How can I receive stream video content over a network with UDP protocol?

How can I receive stream video content over a network with UDP protocol?

I'm using Matlab 2015b, and I want to receive stream video from a Ar Drone Parrot. I have used MMS protocol to try receive stream video without success. I get an error because the format used by Ar Drone is MPEG-4 with H.264 encoded video and this protocol use the function "DSPWinMMFileInfo" which throws error.

So, I want to receive this stream video with UDP protocol, but I don't know how. I have seen examples to transmit audio data over a network with UDP, but not for video.

Please, can anybody help me? Thanks

[Rakesh Chavan]

Hi,

Can you post a snapshot of the error message you receive along with the code snippet that you are using.

The doc. link given below gives an example of sending video over network. Have you used something similar?

http://www.mathworks.com/help/vision/ug/transmit-audio-and-video-content-over-network.html

regards

Rakesh

[María Victoria García]

Hi Rakesh,

Yes, I have used something similar to this example. My code is:

url = 'mms://192.168.1.1:5555';
% Create objects
    hSrc = vision.VideoFileReader('Filename', url);
    hSnk = vision.DeployableVideoPlayer;  
    % Run loop. Ctrl-C to exit. 
    while true
        data = step(hSrc);    
        step(hSnk, data);      
    end
release(hSrc);
release(hSnk);

And I get this error:

Error using DSPWinMMFileInfo
Could not add the data source to the filter graph.

Error in dspmmfileinfo>getFileInfo (line 98)
            videoHeightInPixels, videoFormatName] = DSPWinMMFileInfo(theFile);

Error in dspmmfileinfo (line 19)
        cache.fileInfo(index) = {getFileInfo(filename)};

Error in vision.VideoFileReader/setFileInfoProps

Error in vision.VideoFileReader/set.Filename

Error in matlab.system.SystemProp/parseInputs

Error in matlab.system.SystemProp/setProperties

Error in vision.VideoFileReader

Error in protocolo_mms (line 4)
    hSrc = vision.VideoFileReader('Filename', url);

In addition I have used this code with UDP protocol:

% Initialize several configuration parameters.
IP_address      = '192.168.1.1';
IP_port         = 5555;
sampleRate      = 44100;
samplesPerFrame = 512;
drone.ARv = udp('192.168.1.1', 5555, 'LocalPort', 5555);
fopen(drone.ARv);
% Create System objects to view to data produced by the remote client.
hRemoteSource = dsp.UDPReceiver('LocalIPPort', IP_port,...
    'RemoteIPAddress', IP_address,...
    'MaximumMessageLength', samplesPerFrame,...
    'MessageDataType', 'double');
videoPlayer = vision.VideoPlayer;
fiveSeconds = 5*sampleRate;
for i=1:(fiveSeconds/samplesPerFrame)
    % Connect the remote source to the local sink
    % In other words, receive video data.
       remoteData = step(hRemoteSource);
       step(videoPlayer, remoteData);
end
release(videoPlayer);
release(hRemoteSource);
fclose(drone.ARv);

And I get this error:

%Error using UDPReceiver/step
%Intento de acceso a un socket no permitido por sus permisos de acceso

%Error in udp__ (line 23)
%      remoteData = step(hRemoteSource);

I am looking forward to your response. Thanks.

Regards.

Victoria.

Answer 1

[Florian Enner]

I've uploaded a submission that supports streaming h264 (among other formats) from ip cameras.

% Connect to stream
cam = HebiCam('<address>');

% Continously display latest image
figure();
fig = imshow(getsnapshot(cam));
while true
    set(fig, 'CData', getsnapshot(cam)); 
    drawnow;
end

You can get it from File Exchange or Github

Let me know if this works for you.

[María Victoria García]

Hi Florian,

I've tried your code and I get this error:

Undefined variable "us" or class "us.hebi.matlab.streaming.BackingHebiCam.open".

Error in HebiCam (line 72)
            this.cam = us.hebi.matlab.streaming.BackingHebiCam.open(url);

Error in main (line 3)
cam = HebiCam(url);

Would you know where is the problem?

I am looking forward to your response, please. Thanks.

Regards.

Victoria.

Answer 2

[Dinesh Iyer]

The system object does allow you to read video content over MMS stream. However, the issue might be that it is unable to decode the H.264 stream that is contained in the video.

When you are using UDP, I noticed that the error indicates a permissions issue to access the socket. The system object error also indicates that it is unable to add the source for reading. This might be a permissions issue.

One quick thing to try is see if you are able to view this stream using Windows Media Player as the system object uses some of the same APIs to read it. Open Media Player, File > Open URL and try to stream data from your URL. If Media Player fails, then the system object is expected to fail.

Hope this helps.

Dinesh

[María Victoria García]

I have used Windows Media Player to try if it is possible to view this stream video. I have made indications you have said me and I have used three different url options:

- mms://192.168.1.1:5555

- tcp://192.168.1.1:5555

- udp://192.168.1.1:5555

And I get errors with the three options.

Would you know which is the problem? Is there another possibility to get this stream video?

I am looking forward to your response, please. Thanks.

Regards.

Victoria.

[David]

Hello María VIctoria, I have exactly the same problem...how did you fix the issue on madia player codec?

Thanks in advance for your help,

David

Answer 3

[maha annoukoubi]

hello Maria i m working at the same project , please could you contact me on : [e-mail] so that we may share our informations .

[María Victoria García]

I have used the submission that Florian suggested me.

Regards.

Answer 4

[Mohamed Abdelkader Zahana]

Hi Maria,

I am trying to do almost the same thing. The difference is that I will have an embedded computer (ODROID XU4) with connected camera that streams video over UDP using gstreamer. Then, I would like to receive the video in MATLAB. I'd appreciate if any one can help.

Here is my email in case you find a solution.

Thanks.

[María Victoria García]

I have used the submission that Florian suggested me.

Regards.