Problem Occurs when I tried to detection on videos

[yareenm]

Hey,

I am using yolov4 and darknet. I can do object detection on images but when I do in video I get these errors: -Video-Stream Stopped -Not an option: demo

Here is my command on the Anaconda Prompt: darknet.exe demo data/obj.data cfg/yolov4-obj.cfg backup/yolov4-obj_last.weights walk.mp4 -thresh 0.6

I check the darknet_video.py but I couldn't find the issue.

Thanks

[kurthorvath]

did you try to use other video input? can you share the video?

[wenshuX]

Is there anyone who had solved this? I have the same problem.

thanks!

[kurthorvath]

Hi, do you use linux or windows? i did switch to linux and it solved a lot of problems. hence maybe you can share the command parameters you used

[wenshuX]

hi, thank you very much for your reply I'm really sorry that there are some problems with my network, so I directly sent you an email.

I use Windows, and here are the command I use D:\ayolo\darknet\darknet\build\darknet\x64

darknet detector demo cfg/coco.data cfg/yolov4.cfg yolov4.weights data/test.mp4 darknet.exe detector demo cfg\coco.data cfg\yolov4.cfg yolov4.weights data\001.mp4

001 is the video I named myself

Some more detailed error messages （ [yolo] params: iou loss: ciou (4), iou_norm: 0.07, obj_norm: 1.00, cls_norm: 1.00, delta_norm: 1.00, scale_x_y: 1.05 nms_kind: greedynms (1), beta = 0.600000 Total BFLOPS 128.459 avg_outputs = 1068395 Allocate additional workspace_size = 52.43 MB Loading weights from yolov4.weights... seen 64, trained: 32032 K-images (500 Kilo-batches_64) Done! Loaded 162 layers from weights-file video file: data/test.mp4 warning: Error opening file (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:856) warning: data/test.mp4 (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:857) [ERROR:0] VIDEOIO(cvCreateCapture_MSMF(filename)): raised unknown C++ exception! ）

Thanks again！ @kurthorvath