Vim3 npu demo can't open webcam

VIM3
#1

khadas@Khadas:~/aml_npu_demo_binaries/detect_demo$ ./detect_demo_x11_cv3 /dev/video0 3
W Detect_api:[det_set_log_level:19]Set log level=1
W Detect_api:[det_set_log_level:21]output_format not support Imperfect, default to DET_LOG_TERMINAL
W Detect_api:[det_set_log_level:26]Not exist VSI_NN_LOG_LEVEL, Setenv set_vsi_log_error_level
det_set_log_config Debug
det_set_model success!!

model.width:416
model.height:416
model.channel:3

capture device failed to open!

(detect_demo_x11_cv3:7097): GStreamer-CRITICAL **: 09:52:37.865: gst_element_get_state: assertion ‘GST_IS_ELEMENT (element)’ failed
thread_func exit

#2

@llw555 Run this command ls /dev/video* , If you see vdeio0 and video1 , I think maybe video1 is you webcam .

2 Likes
#3

video0 is my webcam, I can open it with Guvcview.
and I test video1 ,It not work.

#4

@llw555 If it can be open with Gucview , it should can be open with npu demo to … Have you do any modified ? When you use npu demo , have any other program use this camera ?

#5

No, Because the webcam cannot be open, I re-burned the firmware yesterday, and no other programs occupy the webcam. I downloaded the demo again.It still doesn’t work.

#6

the demo of the picture can run normally.

#7

What’s the resolution of your camera? Is it 1080P?

#8

it’s only 720P,An ordinary webcam.

#9

That’s the reason. The demo only support 1080P camera now. So you have to modify the code if you want to use a 720P camera.

1 Like
#10

so is there any way we can run it with 720p webcam?

#11

@Trong_Huu

E.g For UVC:

* Yoloface demo

$ ./detect_demo_xx_usb -d /dev/videoX -m 0 -w 1920 -h 1080

You can use -w and -h to change it to 720p.

1 Like
#12

thanks for your help, i tried your way but its not working. However I fixed the max_height (720) and max_weight(1280) sections in the main.cpp file in the aml_npu_app section and luckily it worked.