openvino demos, webcam input for windows

[erasmus]

Anyone running 2021.2 Openvino demos on windows?

-i  cam does not appear to work now????

(cnnwork) Sun_ C:\repo\omz_demo21\intel64\Release\object_detection_demo.exe -i cam -at yolo -m C:\repo\OpenVINO-YoloV3\frozen_yolo_v3.xml -d MYRIAD

[ INFO ] InferenceEngine: API version ......... 2.1
Build ........... 2021.2.0-1877-176bdf51370-releases/2021/2
[ INFO ] Parsing input parameters
[ INFO ] Reading input
MFX: Unsupported extension: cam
[ERROR:0] global C:\jenkins\workspace\OpenCV\OpenVINO\2021.2\build\windows\opencv\modules\videoio\src\cap.cpp (142) cv::VideoCapture::open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.5.1-openvino) C:\jenkins\workspace\OpenCV\OpenVINO\2021.2\build\windows\opencv\modules\videoio\src\cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): cam in function 'cv::icvExtractPattern'

[ ERROR ] [ ERROR ] Can't read cam

[erasmus · Accepted solution]

camera input appears to work now with just a number on windows...

(cnnwork) Sun_ C:\repo\omz_demo21\intel64\Release\object_detection_demo.exe -i 0 -at yolo -m C:\repo\OpenVINO-YoloV3\frozen_yolo_v3.xml -d MYRIAD -loop 1000
[ INFO ] InferenceEngine: API version ......... 2.1
Build ........... 2021.2.0-1877-176bdf51370-releases/2021/2
[ INFO ] Parsing input parameters
[ INFO ] Reading input
[ INFO ] Loading Inference Engine
[ INFO ] Device info:
[ INFO ] MYRIAD
myriadPlugin version ......... 2.1
Build ........... 2021.2.0-1877-176bdf51370-releases/2021/2
Loading network files
[ INFO ] Batch size is forced to 1.
[ INFO ] Checking that the inputs are as the demo expects
[ INFO ] Checking that the outputs are as the demo expects
[ INFO ] Loading model to the device

[ INFO ] Metric reports:
Latency: 507.6 ms
FPS: 14.8

[IntelSupport]

Hi Erasmus,

We glad that you are able to solve the issue, and thank you for sharing the solution. I will mark your answer as the solution. For certain Openvino demos you have to specify the camera input flag as -i 0 or -i cam depends on the samples that you are running. Both of the flags have the same function depending on the sample. Before running the application, you can run the application with the -h option to see the usage message for the demo application. This thread will no longer be monitored since this issue has been resolved. If you need any additional information from Intel, please submit a new question.

Regards,

Aznie