Fail With JavaCV not Responding RTSP in frameGrabber.start()

[willagner]

I have one program to get one video in protocol rtsp using JavaCV:

My program is like this:

public static void main(String[] args){

    FrameGrabber frameGrabber = new 

    FFmpegFrameGrabber("rtsp://ip:port/login&password");

    CanvasFrame canvasFrame = new CanvasFrame("Test");

    frameGrabber.start();

    for(int i = 0; i<frameGrabber.getLengthInFrames(); i++){
       canvasFrame.showImage(frameGrabber.grab());
    }
    frameGrabber.flush();

    canvasFrame.dispose();
}

If I use one correct link rtsp my program return and I can deal with he.

But if the link are incorrect or the ipcam are desconnected the program not return in the command frameGrabber.start();

The program crash, not return error and not do more nothing.

I've already tried use try catch but didn't have sucess, the program not return.

Edit:

I did tests with other protocols like http, and it does not occur this problem, the program return one message that can not open the link, to http are ok, but when using rtsp not return.

[saudet]

So, it sounds like a problem with FFmpeg. Could you report that upstream?

[willagner]

I find the solution.

It is necessary you define one timeout.

streamGrabber.setOption("timeout" , "3");

The default value for this parameter is '-1' (infinite).

"Timeout
Set maximum timeout (in seconds) to wait for incoming connections.

A value of -1 means infinite (default). This option implies the rtsp_flags set to ‘listen’."

[saudet]

Great find! Maybe this also fixes #97 #124 #165 #170 #430 and #462? @grimaz @hihi0677 @gtow @rpgomes @guylevin @nacyliu

[willagner]

👍

Thank you !

[d-a-gerashenko]

Why it's not working for me? I can't even start grabber when uses grabber.setOption("timeout" , "3");.
This code:

try {
	FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov");
	grabber.setOption("timeout" , "3");
	grabber.start();
	while (grabber.grab() != null) {
		System.out.println("frame grabbed");
	}
} catch (FrameGrabber.Exception ex) {
	System.err.println(ex);
}
System.out.println("end");

Returns error:

org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -10049: Could not open input "rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov". (Has setFormat() been called?)
end
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8
[rtsp @ 168529a0] Unable to open RTSP for listening
[rtsp @ 16855980] Unable to open RTSP for listening

Without this options it works but there is no timeout.

JDK 1.8.0 x32
Windows 7 x64
javacv-platform 1.3.2

[saudet]

That flag is only valid for listening connections:

This option implies the rtsp_flags set to ‘listen’.

I don't think this is the flag you want. There is another flag is isn't for listening connections though.

[saudet]

FYI, it looks like the "stimeout" option works for RTSP streams:
#711 (comment)

[saudet]

It turns out that we need to set the "stimeout" option for the RTSP protocol. Thanks to @d-a-gerashenko we now have working sample code for this:
https://github.com/bytedeco/javacv/blob/master/samples/FFmpegStreamingTimeout.java