Opencv camera Settings number

[dentx22]

hello Nikolas how are you I have a problem but how do you identify the opencv cameras I have 2 but it gives me the frames from only one.
opencv is made for a camera or am I doing something wrong in the *. ini ??
Thank you

[dentx22]

this is my *.ini

Z3DScanner.ini

[StructuredLightSystem]
Type=Z3D::ZStereoSLSPlugin
Mode=DualCamera

Cameras/Left/Type=Z3D::ZOpenCVVideoCapturePlugin
Name=Left
Folder=../tmp/multicameracalibration/20230218121436

Cameras/Right/Type=Z3D::ZOpenCVVideoCapturePlugin
Name=Right
Folder=../tmp/multicameracalibration/20230218121436

StereoCalibration/Type=Pinhole
StereoCalibration/ConfigFile=tmp/multicameracalibration/20230218121436/20230218140551.multicameracalib.yml
PatternProjection/Type=Z3D::ZBinaryPatternProjectionPlugin

[dentx22]

does anyone know how to fix it?

[nikolaseu]

You can set the DeviceID

It's not great, the number might change when you connect/disconnect or reboot. But at least you can set 0 and 1 and will get different cameras.

But you should use a different plugin if possible, the one for OpenCV is not very customizable and has this issue. Or maybe it could be improved, I don't know the current options in cv::VideoCapture.

[dentx22]

[ INFO:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo
dules\videoio\src\videoio_registry.cpp (187) cv::anonymous-namespace'::VideoBac kendRegistry::VideoBackendRegistry VIDEOIO: Enabled backends(7, sorted by priori ty): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); MSMF(970); DSHOW(960); CV_IMA GES(950); CV_MJPEG(940) [ INFO:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo dules\videoio\src\backend_plugin.cpp (353) cv::impl::getPluginCandidates Found 2 plugin(s) for GSTREAMER [ INFO:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo dules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad loa d D:\_______test_scanner\________opencv4\neuvision-374.git\neuvision-374x2.git\t est_debugx64\bin\Debug\opencv_videoio_gstreamer430_64.dll => FAILED [ INFO:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo dules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad loa d opencv_videoio_gstreamer430_64.dll => FAILED [ WARN:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo dules\videoio\src\cap_msmf.cpp (436) anonymous-namespace'::SourceReaderCB::~Sou
rceReaderCB terminating async callback
[ WARN:0] global F:\tools\vcpkg\buildtrees\opencv4\src\4.3.0-8460981b10.clean\mo
dules\videoio\src\cap_msmf.cpp (436) `anonymous-namespace'::SourceReaderCB::~Sou
rceReaderCB terminating async callback

I'm redoing opencv I added the GSTREAMER
I'll check tomorrow if it's better

[DeviceID] non va it doesn't work, my cameras are 1 and 2

[dentx22]

DeviceID=0
DeviceID=1
nothing to do I tried in every way but sees only one at a time

[dentx22]

added code for read key

result
default: ("Left/Folder", "Left/Name", "Left/Type", "Right/Folder", "Right/Name", "Right/Type")
that's right??

[dentx22]

for 3d scanner
17:59:57.139 [0x0033B200] default: ("Left/Folder", "Left/Name", "Left/camera/Type", "Right/Folder", "Right/Name", "Right/camera/Type", "StructuredLightSystem/Mode", "StructuredLightSystem/PatternProjection/Type", "StructuredLightSystem/StereoCalibration/ConfigFile", "StructuredLightSystem/StereoCalibration/Type", "StructuredLightSystem/Type")