Axis IP Camera can be added, but no Image seen. #404

gerth2 · 2016-01-22T01:30:02Z

Using GRIP 1.0.0 on a x64 windows system. Can view webcam live view in Chrome. Putting in the IP address of the camera seems to add it in GRIP, but no image preview is available. Framerate is reported at zero. No downstream connected blocks have any visual output.

Exception thrown when deleting the camera in GRIP:

An event subscriber threw an exception

Stack Trace:

java.util.concurrent.TimeoutException: Unable to terminate video feed from IP Camera 10.17.36.12
    at edu.wpi.grip.core.sources.CameraSource.stop(CameraSource.java:279)
    at edu.wpi.grip.core.sources.CameraSource.onSourceRemovedEvent(CameraSource.java:312)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at edu.wpi.grip.ui.pipeline.source.SourceController.delete(SourceController.java:103)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
    at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1771)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3470)
    at javafx.scene.Scene$ClickGenerator.access$8100(Scene.java:3398)
    at javafx.scene.Scene$MouseHandler.process(Scene.java:3766)
    at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
    at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
    at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
    at com.sun.glass.ui.View.notifyMouse(View.java:937)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)

System Info:

Property Name	Property
GRIP Version	1.0.0
java.version	1.8.0_66
javafx.version	8.0.66
os.name	Windows 7
os.version	6.1
os.arch	amd64

This issue is most likely downstream of the actual problem. Any good way to go about debugging why the image preview is not displaying in GRIP to start?

gerth2 · 2016-01-22T01:46:40Z

Looks like this might be similar or the same as #391 .

JLLeitschuh · 2016-01-22T01:50:58Z

What did you enter when you created the webcam?
Make sure you don't have a trailing slash when creating the camera's IP address. We automatically append /mjpg/video.mjpg to the end of the URL if you don't do it.
Alternatively, try using the address 10.17.36.12/mjpg/video.mjpg and see if that works.

gerth2 · 2016-01-22T02:00:56Z

Just attempted with:

http://10.17.36.12/mjpg/video.mjpg , same behavior. Attempted to just enter "10.17.36.12" - http:// was automatically prepended within the dialog box, but still same behavior.

cyberx696 · 2016-01-22T08:00:47Z

Same issue as #387

gerth2 · 2016-01-22T12:23:17Z

Cool! We're not the only ones. I was never able to get any frames off of
our camera, but the exception on close looks the same.
On Jan 22, 2016 2:00 AM, "cyberx696" notifications@github.com wrote:

Same issue as #387
#387

—
Reply to this email directly or view it on GitHub
#404 (comment)
.

JLLeitschuh · 2016-01-22T17:56:38Z

I don't have access to a windows machine to test this bug on. Is there anyone out there not on a Windows machine that is also experiencing this problem?

bathtubed · 2016-01-23T06:40:13Z

I'm experiencing this on Ubuntu 14.04 with a non-axis MPJEG stream. (Streaming from my raspi cam). I can get the stream in browser and on smartdash simple camera viewer, but GRIP isn't previewing, showing frames, and timing out and throwing that exception on delete or stop

gerth2 · 2016-01-26T00:25:40Z

Tested on Windows x64 with GRIP 1.1.0 and 1.1.1 - same issue.

gerth2 · 2016-01-26T01:05:21Z

Sorry, punched the wrong button. Doing some more sampling now, hopefully will have something useful to report soon.

gerth2 · 2016-01-26T01:47:26Z

Ok, another sample point - tried on a different PC running windows 10.

Were able to get some camera images sporadically - image stream would either start and work fine, or not start at all. Seemed that sometimes it would work the very first time after a fresh grip session was started and the camera had just been reset, but the break on subsequent IP camera deletion/add cycles within the same session of Grip. Other times, it would not display anything on the first IP camera add, produced the above stack trace on deletion, then succeed displaying the stream on the second attempt to add an IP camera. All of this is on the windows 10 PC, still a 0% success rate on multiple windows 7 machines.

I'm leaning toward there being something in the frame grabber thread which isn't going 100% as expected, then on deletion the thread hangs and triggers the timeout. What is causing the hang isn't immediately obvious though....

imdunne8 · 2016-01-26T15:32:01Z

I was working with @gerth2 on this last night and we did some more testing on this. It looks like we had something on the roboRio that was taking over the frame grabber at some times. We disconnected the roboRio and had a 100% success rate on the Windows 10 machine assuming we didn't have an existing process accessing the frame grabber. We believe the issue with the Windows 7 machines relates to some security software/settings installed by our sponsor. We'll have a completely different (store purchased) Windows 7 laptop to try tonight to confirm that theory. Assuming that all checks out it may make sense to close this issue, but if somebody wants us to dig into the source code and see where the error is popping up on our current Windows 7 machines we can try to figure that out when we have the time.

For others reporting similar issues, here's our setup that worked reliably every time in GRIP that you should be able to use as a baseline:

Axis IP Camera attached to wireless router
roboRIO disconnected from router or powered off
Windows 10 machine running GRIP 1.1.1 connected wireless to router
Power cycle camera and wait for ring to turn green (kills existing connections to framegrabber)
In GRIP, Add IP Camera. Type just the camera's IP address (http:// is appended automatically)
Press OK (/mjpg/video.mjpg will be appended by GRIP)
Click the eye icon to view the image from the webcam in GRIP

- The IPCameraFrameGrabber was stuck in an infinte loop waiting for the rest of the image to arrive. This was fixed by using a DataInputStream instead - An unexpected end of the stream would cause a null pointer exception. Now throws an EOFException. WPIRoboticsProjects#390 Closes WPIRoboticsProjects#390 Closes WPIRoboticsProjects#427 Closes WPIRoboticsProjects#404 Closes WPIRoboticsProjects#387 Closes WPIRoboticsProjects#436

- The IPCameraFrameGrabber was stuck in an infinte loop waiting for the rest of the image to arrive. This was fixed by using a DataInputStream instead - An unexpected end of the stream would cause a null pointer exception. Now throws an EOFException. WPIRoboticsProjects#390 Closes WPIRoboticsProjects#390 Closes WPIRoboticsProjects#427 Closes WPIRoboticsProjects#404 Closes WPIRoboticsProjects#387 Closes WPIRoboticsProjects#436 Related bytedeco/javacv#322

- The IPCameraFrameGrabber was stuck in an infinte loop waiting for the rest of the image to arrive. This was fixed by using a DataInputStream instead - An unexpected end of the stream would cause a null pointer exception. Now throws an EOFException. WPIRoboticsProjects#390 Closes WPIRoboticsProjects#390 Closes WPIRoboticsProjects#427 Closes WPIRoboticsProjects#404 Closes WPIRoboticsProjects#387 Closes WPIRoboticsProjects#436 Closes WPIRoboticsProjects#460 Related bytedeco/javacv#322

JLLeitschuh added type: bug type: question location: core labels Jan 22, 2016

gerth2 closed this as completed Jan 26, 2016

gerth2 reopened this Jan 26, 2016

ThomasJClark assigned JLLeitschuh Jan 26, 2016

JLLeitschuh added well documented os: Windows labels Jan 27, 2016

JLLeitschuh mentioned this issue Jan 29, 2016

Fixes IP Cameras Hanging #456

Merged

ThomasJClark closed this as completed in #456 Feb 5, 2016

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Axis IP Camera can be added, but no Image seen. #404

Axis IP Camera can be added, but no Image seen. #404

gerth2 commented Jan 22, 2016

gerth2 commented Jan 22, 2016

JLLeitschuh commented Jan 22, 2016

gerth2 commented Jan 22, 2016

cyberx696 commented Jan 22, 2016

gerth2 commented Jan 22, 2016

JLLeitschuh commented Jan 22, 2016

bathtubed commented Jan 23, 2016

gerth2 commented Jan 26, 2016

gerth2 commented Jan 26, 2016

gerth2 commented Jan 26, 2016

imdunne8 commented Jan 26, 2016

Axis IP Camera can be added, but no Image seen. #404

Axis IP Camera can be added, but no Image seen. #404

Comments

gerth2 commented Jan 22, 2016

Stack Trace:

System Info:

gerth2 commented Jan 22, 2016

JLLeitschuh commented Jan 22, 2016

gerth2 commented Jan 22, 2016

cyberx696 commented Jan 22, 2016

gerth2 commented Jan 22, 2016

JLLeitschuh commented Jan 22, 2016

bathtubed commented Jan 23, 2016

gerth2 commented Jan 26, 2016

gerth2 commented Jan 26, 2016

gerth2 commented Jan 26, 2016

imdunne8 commented Jan 26, 2016