Darknet: "input video stream closed." | Webcam working but not videos | Old checkout videos working !

[deimsdeutsch]

darknet.exe detector demo data/coco.data yolov3.cfg yolov3.weights test_person/1.mp4 -i 0

In the old repo the following command is working !

But the checkout i took 2 days back is giving the error

101 conv 128 1 x 1 / 1 52 x 52 x 256 -> 52 x 52 x 128 0.177 BF
102 conv 256 3 x 3 / 1 52 x 52 x 128 -> 52 x 52 x 256 1.595 BF
103 conv 128 1 x 1 / 1 52 x 52 x 256 -> 52 x 52 x 128 0.177 BF
104 conv 256 3 x 3 / 1 52 x 52 x 128 -> 52 x 52 x 256 1.595 BF
105 conv 255 1 x 1 / 1 52 x 52 x 256 -> 52 x 52 x 255 0.353 BF
106 yolo
Total BFLOPS 65.864
Loading weights from yolov3.weights...
seen 64
Done!
video file: test_person/1.mp4
Video-stream stoped!
Stream closed.
Video-stream stoped!
Stream closed.

FPS:0.0
Video-stream stoped!
Stream closed.

FPS:0.0
Video-stream stoped!
Stream closed.

FPS:0.0
input video stream closed.

[AlexeyAB]

1. What OpenCV version do you use?
2. Do you get this error for another mp4-files?
3. Try to use the latest version from GitHub

[deimsdeutsch]

-OpenCV version 3.4.0
-Took new checkout and without modifying anything i played multiple mp4 files same error.

[AlexeyAB]

Try to change these lines: https://github.com/AlexeyAB/darknet/blob/c1bb8c129d7d4d8fc85348d5e7ac5441fa36ead5/src/demo.c#L155-L156
to this:
cap = cvCaptureFromFile(filename);

and recompile.

[dexception]

----++ Getting the same error after update---

I am getting the following error after modification:

105 conv 255 1 x 1 / 1 52 x 52 x 256 -> 52 x 52 x 255 0.353 BF
106 yolo
Total BFLOPS 65.864
Loading weights from yolov3.weights...
seen 64
Done!
video file: test_person/1.mp4
Couldn't connect to webcam.
: No error

[deimsdeutsch]

Still not working...

[AlexeyAB]

@deimsdeutsch @dexception
You use incorrect path to the mp4-file.
Did you set correctly in MSVS output directory and work directory?
Try to run Darknet not from MSVS.

I can use it successfully:

[deimsdeutsch]

This time i have used the full path and i can play the video copy paste in VLC.

darknet.exe detector demo data\coco.data yolov3.cfg yolov3.weights E:\darknet\build\darknet\x64\test_person\1.mp4 -i 0

[deimsdeutsch]

Looks like opencv is unable to decode the video and returning null which is strange because in the older working directory of darknet i am able to decode and play the same video ???

Same error faced by other person:
https://github.com/pjreddie/darknet/issues/669

[AlexeyAB]

Try to do this: https://github.com/AlexeyAB/darknet#how-to-compile-on-windows

1.1. Find files opencv_world320.dll and opencv_ffmpeg320_64.dll (or opencv_world340.dll and opencv_ffmpeg340_64.dll) in C:\opencv_3.0\opencv\build\x64\vc14\bin and put it near with darknet.exe

[deimsdeutsch]

copied the darknet.cvxproj from older directory to new one...
copied all 3 dlls and its working !

@AlexeyAB
Thanks.

[nolancardozo13]

Have the same issue on my linux machine. Any solution for this?

[PumayHui]

Have the same issue on my linux machine. Any solution for this?