USB camera on ARM64 RPi3

Joel <[email protected]>
Newsgroups gmane.os.netbsd.ports.arm
Message-ID <[email protected]> 
Hello -- I have an RPi3 running GENERIC Aarch64 NetBSD 10-RELEASE. It 
has generally been good. Recently I'm trying to get an OpenCV 4.x build 
to work. With some minimal cmake file changes, I've had success on a 
RockPro64 and Pinebook Pro -- same Rockchip SoC. Motivation is that 
current pkgsrc OpenCV 3.x doesn't work (ARM64 nor AMD64) with USB 
cameras (separate thread on that, related to buffer reallocation to 
change resolution). Okay, plot is set.

On the RPi3, I see an error I don't on the Rockchip devices. It's a 
simple 1) open cam, 2) read image, 3) write image, 4) close. I'll start 
with naive debugging:
Could there be a chipset difference that could be causing the failure 
only on one?

With opencv debugging output on, here is where the failure is:

[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_DQBUF(3227014673), ...) 
=> -1    errno=35 (Resource temporarily unavailable)
[ WARN:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (1021) tryIoctl 
VIDEOIO(V4L2:/dev/video0): select() timeout.
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (957) 
read_frame_v4l2 VIDEOIO(V4L2:/dev/video0): can't read frame 
(VIDIOC_DQBUF): errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_STREAMOFF(2147767827), 
failIfBusy=1)

It's failing on a select() call at 
opencv/modules/videoio/src/cap_v4l.cpp:982.

Here's the successful trace on the RockPro64:

[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_DQBUF(3227014673), ...) 
=> -1    errno=35 (Resource temporarily unavailable)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (1025) tryIoctl 
VIDEOIO(V4L2:/dev/video0): select(5) => 1   errno = 0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_DQBUF(3227014673), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QBUF(3227014671), 
failIfBusy=1)

Can anyONE guide me to further understand why the select() fails on one 
chipset and not another, using the same GENERIC ARM64 NetBSD?

BTW: No luck with pkgsrc ffmpeg5 either -- still debugging that.

Thanks - Joel

Below is the entire failed trace on the RPi3:

[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/python/src2/cv2.cpp (95) 
pycvRegisterMatType pycvRegisterMatType 0xfb443b59b790 0xfb443bb7ac10
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/videoio_registry.cpp (197) 
VideoBackendRegistry VIDEOIO: Builtin backends(3): V4L_BSD(1000); 
CV_IMAGES(990); CV_MJPEG(980)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/videoio_registry.cpp (221) 
VideoBackendRegistry VIDEOIO: Available backends(3): V4L_BSD(1000); 
CV_IMAGES(990); CV_MJPEG(980)
[ INFO:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/videoio_registry.cpp (223) 
VideoBackendRegistry VIDEOIO: Enabled backends(3, sorted by priority): 
V4L_BSD(1000); CV_IMAGES(990); CV_MJPEG(980)
[ WARN:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap.cpp (130) open 
VIDEOIO(V4L_BSD): trying capture filename='/dev/video0' ...
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (918) open 
VIDEOIO(V4L2:/dev/video0): opening...
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (934) open 
VIDEOIO(V4L2:/dev/video0): deviceHandle=5
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QUERYCAP(1080579584), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QUERYCAP(1080579584), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_G_FMT(3234878980), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_G_FMT(3234878980), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> -1    errno=22 (Invalid argument)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> -1    errno=22 (Invalid argument)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> -1    errno=22 (Invalid argument)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> -1    errno=22 (Invalid argument)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> -1    errno=22 (Invalid argument)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_FMT(3234878981), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_FMT(3234878981), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_S_PARM(3234616854), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_S_PARM(3234616854), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_G_PARM(3234616853), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_G_PARM(3234616853), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (623) setFps 
VIDEOIO(V4L2:/dev/video0): FPS=30/1
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_REQBUFS(3222558216), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_REQBUFS(3222558216), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QUERYBUF(3227014665), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QUERYBUF(3227014665), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QUERYBUF(3227014665), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QUERYBUF(3227014665), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QUERYBUF(3227014665), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QUERYBUF(3227014665), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QUERYBUF(3227014665), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QUERYBUF(3227014665), 
...) => 0    errno=0 (Undefined error: 0)
[ WARN:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap.cpp (142) open 
VIDEOIO(V4L_BSD): created, isOpened=1
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QBUF(3227014671), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QBUF(3227014671), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QBUF(3227014671), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QBUF(3227014671), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QBUF(3227014671), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QBUF(3227014671), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_QBUF(3227014671), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_QBUF(3227014671), ...) 
=> 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_STREAMON(2147767826), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_STREAMON(2147767826), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_DQBUF(3227014673), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_DQBUF(3227014673), ...) 
=> -1    errno=35 (Resource temporarily unavailable)
[ WARN:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (1021) tryIoctl 
VIDEOIO(V4L2:/dev/video0): select() timeout.
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (957) 
read_frame_v4l2 VIDEOIO(V4L2:/dev/video0): can't read frame 
(VIDIOC_DQBUF): errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_STREAMOFF(2147767827), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_STREAMOFF(2147767827), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (976) tryIoctl 
VIDEOIO(V4L2:/dev/video0): tryIoctl(5, VIDIOC_REQBUFS(3222558216), 
failIfBusy=1)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (984) tryIoctl 
VIDEOIO(V4L2:/dev/video0): call ioctl(5, VIDIOC_REQBUFS(3222558216), 
...) => 0    errno=0 (Undefined error: 0)
[DEBUG:[email protected]] global 
/home/joelp/repos/opencv/modules/videoio/src/cap_v4l.cpp (469) 
closeDevice VIDEOIO(V4L2:/dev/video0): close(5)
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.