使用JavaCV Library接收RTSP流

Question

I am currently trying to obtain an RTSP stream from an IP camera on my network so that I can apply facial recognition algorithms to the frames (I am using the JavaCV library for this).

When I attempt to obtain the RTSP stream, I start getting an error depending upon the method that I tried to use.

Here is the code that should work:

try {
    FFmpegFrameGrabber streamGrabber = new FFmpegFrameGrabber("rtsp://admin:12345@(ip)/ch1/main/av_stream");
    streamGrabber.setFormat("h264");
    streamGrabber.setFrameRate(30);
    streamGrabber.setImageWidth(getWidth());
    streamGrabber.setImageHeight(getHeight());
    streamGrabber.start();
} catch (Exception e) {
    e.printStackTrace();
}

That particular piece of code gives me this error:

org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -1330794744: Could not open input "rtsp://admin:12345@192.168.64.96/ch1/main/av_stream". (Has setFormat() been called?)
    at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:393)
    at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:341)
    at main.FaceApplet.init(FaceApplet.java:87)
    at sun.applet.AppletPanel.run(AppletPanel.java:425)
    at java.lang.Thread.run(Thread.java:695)

I have tried:

• Using OpenCVFrameGrabber instead - error says "Could not create camera capture"

• Using IPCameraFrameGrabber - requires http url

• Changing Protocol:

  • FTP: Authentication Failed

  • TCP: Freezes the program

  • UDP: Authentication Failed

What am I doing wrong, is this a code issue or a camera issue?

Answer 1

Update

I Finally got it working... the magic formula seems to be using the FFMpeggrabber to obtain a stream... to avoid the error, just don't set the video format using the function. Initializer code should look something like this:

streamGrabber = new FFmpegFrameGrabber("rtsp://admin:12345@(ip):554/live.sdp");
streamGrabber.setFrameRate(30);
streamGrabber.setImageWidth(getWidth());

try {
    streamGrabber.start();
} catch (FrameGrabber.Exception e) {
    e.printStackTrace();
}