Unable to make OpenCV plugin (input_opencv.so and cvfilter_py.so) during compile.

[ansarid]

I've been unable to satisfy the cmake requirements needed to compile input_opencv.so during the make and make install process. Unsure if I'm missing something simple or if there is a legitimate issue that needs to be tackled. Either way I've spent a lot of time trying to make this work and been unsuccessful.

Steps to Reproduce:

Platform: Raspberry Pi 3 Model B+ OS: Raspberry Pi OS Lite

1. Download and Flash Raspberry Pi OS Lite to a microSD card. Setup WiFi, SSH, etc.

2. Update and Upgrade:

   sudo apt update 
   sudo apt upgrade -y
   sudo apt dist-upgrade -y

3. Install Dependencies:

   sudo apt install git gcc g++ cmake libjpeg8-dev  -y
   sudo apt install python3-opencv libopencv-dev libprotobuf-c-dev libsdl-dev -y

4. Clone mjpg-streamer:

   git clone https://github.com/jacksonliam/mjpg-streamer

5. Compile:

   cd mjpg-streamer/mjpg-streamer-experimental
   export OpenCV_DIR=/usr/share/OpenCV
   make
   sudo make install

   Output:

   
   pi@raspberrypi:~/mjpg-streamer/mjpg-streamer-experimental $ make
   [ -d _build ] || mkdir _build
   [ -f _build/Makefile ] || (cd _build && cmake  -DCMAKE_BUILD_TYPE=Release ..)
   -- The C compiler identification is GNU 8.3.0
   -- Check for working C compiler: /usr/bin/cc
   -- Check for working C compiler: /usr/bin/cc -- works
   -- Detecting C compiler ABI info
   -- Detecting C compiler ABI info - done
   -- Detecting C compile features
   -- Detecting C compile features - done
   CMAKE_BUILD_TYPE = Release
   -- Looking for include file sys/inotify.h
   -- Looking for include file sys/inotify.h - found
   -- Found OpenCV: /usr (found version "3.2.0") found components:  core imgproc highgui videoio 
   -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29") 
   -- Checking for module 'libgphoto2'
   --   Found libgphoto2, version 2.5.22
   -- Found GPHOTO2: /usr/lib/arm-linux-gnueabihf/libgphoto2.so  
   -- Looking for include file linux/videodev2.h
   -- Looking for include file linux/videodev2.h - found
   -- Looking for pthread.h
   -- Looking for pthread.h - found
   -- Looking for pthread_create
   -- Looking for pthread_create - not found
   -- Looking for pthread_create in pthreads
   -- Looking for pthread_create in pthreads - not found
   -- Looking for pthread_create in pthread
   -- Looking for pthread_create in pthread - found
   -- Found Threads: TRUE  
   -- Found SDL: /usr/lib/arm-linux-gnueabihf/libSDLmain.a;/usr/lib/arm-linux-gnueabihf/libSDL.so;-lpthread (found version "1.2.15") 
   -- Found protobuf-c: /usr/lib/arm-linux-gnueabihf/libprotobuf-c.so  
   -- The following features have been enabled:
   
   * PLUGIN_INPUT_FILE, File input plugin
   * PLUGIN_INPUT_HTTP, HTTP input proxy plugin
   * PLUGIN_INPUT_RASPICAM, Raspberry Pi input camera plugin
   * PLUGIN_INPUT_PTP2, PTP2 input plugin
   * PLUGIN_INPUT_UVC, Video 4 Linux input plugin
   * PLUGIN_OUTPUT_FILE, File output plugin
   * PLUGIN_OUTPUT_HTTP, HTTP server output plugin
   * PLUGIN_OUTPUT_RTSP, RTSP output plugin
   * PLUGIN_OUTPUT_UDP, UDP output stream plugin
   * PLUGIN_OUTPUT_VIEWER, SDL output viewer plugin

-- The following OPTIONAL packages have been found:

• OpenCV
• Gphoto2
• Threads
• SDL

-- The following features have been disabled:

• WXP_COMPAT, Enable compatibility with WebcamXP
• PLUGIN_INPUT_OPENCV, OpenCV input plugin (unmet dependencies)
• ENABLE_HTTP_MANAGEMENT, Enable experimental HTTP management option
• PLUGIN_OUTPUT_ZMQSERVER, ZMQ Server output plugin (unmet dependencies)

-- Configuring done -- Generating done -- Build files have been written to: /home/pi/mjpg-streamer/mjpg-streamer-experimental/_build make -C _build make[1]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[2]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target mjpg_streamer make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 3%] Building C object CMakeFiles/mjpg_streamer.dir/mjpg_streamer.c.o [ 6%] Building C object CMakeFiles/mjpg_streamer.dir/utils.c.o [ 10%] Linking C executable mjpg_streamer make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 10%] Built target mjpg_streamer make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target input_file make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 13%] Building C object plugins/input_file/CMakeFiles/input_file.dir/input_file.c.o [ 17%] Linking C shared library input_file.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 17%] Built target input_file make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target input_http make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 20%] Building C object plugins/input_http/CMakeFiles/input_http.dir/input_http.c.o [ 24%] Building C object plugins/input_http/CMakeFiles/input_http.dir/misc.c.o [ 27%] Building C object plugins/input_http/CMakeFiles/input_http.dir/mjpg-proxy.c.o [ 31%] Linking C shared library input_http.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 31%] Built target input_http make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target input_raspicam make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 34%] Building C object plugins/input_raspicam/CMakeFiles/input_raspicam.dir/input_raspicam.c.o In file included from /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/input_raspicam.c:51: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c: In function ‘raspicamcontrol_set_saturation’: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c:762:32: warning: implicit declaration of function ‘mmal_port_parameter_set_rational’; did you mean ‘mmal_port_parameter_set’? [-Wimplicit-function-declaration] ret = mmal_status_to_int(mmal_port_parameter_set_rational(camera->control, MMAL_PARAMETER_SATURATION, value)); ^~~~~~~~ mmal_port_parameter_set /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c: In function ‘raspicamcontrol_set_ISO’: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c:864:30: warning: implicit declaration of function ‘mmal_port_parameter_set_uint32’; did you mean ‘mmal_port_parameter_set’? [-Wimplicit-function-declaration] return mmal_status_to_int(mmal_port_parameter_set_uint32(camera->control, MMAL_PARAMETER_ISO, ISO)); ^~~~~~~~~~ mmal_port_parameter_set /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c: In function ‘raspicamcontrol_set_video_stabilisation’: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c:899:30: warning: implicit declaration of function ‘mmal_port_parameter_set_boolean’; did you mean ‘mmal_port_parameter_set’? [-Wimplicit-function-declaration] return mmal_status_to_int(mmal_port_parameter_set_boolean(camera->control, MMAL_PARAMETER_VIDEO_STABILISATION, vstabilisation)); ^~~~~~~ mmal_port_parameter_set /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c: In function ‘raspicamcontrol_set_exposure_compensation’: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/RaspiCamControl.c:913:30: warning: implicit declaration of function ‘mmal_port_parameter_set_int32’; did you mean ‘mmal_port_parameter_set’? [-Wimplicit-function-declaration] return mmal_status_to_int(mmal_port_parameter_set_int32(camera->control, MMAL_PARAMETER_EXPOSURE_COMP , exp_comp)); ^~~~~~~~~ mmal_port_parameter_set /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/input_raspicam.c: In function ‘worker_thread’: /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/input_raspicam.c:885:10: warning: implicit declaration of function ‘mmal_port_pool_create’; did you mean ‘mmal_pool_create’? [-Wimplicit-function-declaration] pool = mmal_port_pool_create(encoder_output, encoder_output->buffer_num, encoder_output->buffer_size); ^~~~~ mmal_pool_create /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/input_raspicam.c:885:8: warning: assignment to ‘MMAL_POOL_T ’ {aka ‘struct MMAL_POOL_T ’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion] pool = mmal_port_pool_create(encoder_output, encoder_output->buffer_num, encoder_output->buffer_size); ^ /home/pi/mjpg-streamer/mjpg-streamer-experimental/plugins/input_raspicam/input_raspicam.c:1057:5: warning: implicit declaration of function ‘mmal_port_pool_destroy’; did you mean ‘mmal_pool_destroy’? [-Wimplicit-function-declaration] mmal_port_pool_destroy(encoder->output[0], pool); ^~~~~~ mmal_pool_destroy [ 37%] Linking C shared library input_raspicam.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 37%] Built target input_raspicam make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target input_ptp2 make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 41%] Building C object plugins/input_ptp2/CMakeFiles/input_ptp2.dir/input_ptp2.c.o [ 44%] Linking C shared library input_ptp2.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 44%] Built target input_ptp2 make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target input_uvc make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 48%] Building C object plugins/input_uvc/CMakeFiles/input_uvc.dir/dynctrl.c.o [ 51%] Building C object plugins/input_uvc/CMakeFiles/input_uvc.dir/input_uvc.c.o [ 55%] Building C object plugins/input_uvc/CMakeFiles/input_uvc.dir/jpeg_utils.c.o [ 58%] Building C object plugins/input_uvc/CMakeFiles/input_uvc.dir/v4l2uvc.c.o [ 62%] Linking C shared library input_uvc.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 62%] Built target input_uvc make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target output_file make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 65%] Building C object plugins/output_file/CMakeFiles/output_file.dir/output_file.c.o [ 68%] Linking C shared library output_file.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 68%] Built target output_file make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target output_http make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 72%] Building C object plugins/output_http/CMakeFiles/output_http.dir/httpd.c.o [ 75%] Building C object plugins/output_http/CMakeFiles/output_http.dir/output_http.c.o [ 79%] Linking C shared library output_http.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 79%] Built target output_http make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target output_rtsp make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 82%] Building C object plugins/output_rtsp/CMakeFiles/output_rtsp.dir/output_rtsp.c.o [ 86%] Linking C shared library output_rtsp.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 86%] Built target output_rtsp make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target output_udp make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 89%] Building C object plugins/output_udp/CMakeFiles/output_udp.dir/output_udp.c.o [ 93%] Linking C shared library output_udp.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 93%] Built target output_udp make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Scanning dependencies of target output_viewer make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 96%] Building C object plugins/output_viewer/CMakeFiles/output_viewer.dir/output_viewer.c.o [100%] Linking C shared library output_viewer.so make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [100%] Built target output_viewer make[2]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[1]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' pi@raspberrypi:~/mjpg-streamer/mjpg-streamer-experimental $ sudo make install make -C _build install make[1]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[2]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 10%] Built target mjpg_streamer make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 17%] Built target input_file make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 31%] Built target input_http make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 37%] Built target input_raspicam make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 44%] Built target input_ptp2 make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 62%] Built target input_uvc make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 68%] Built target output_file make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 79%] Built target output_http make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 86%] Built target output_rtsp make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [ 93%] Built target output_udp make[3]: Entering directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' make[3]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' [100%] Built target output_viewer make[2]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build' Install the project... -- Install configuration: "Release" -- Installing: /usr/local/bin/mjpg_streamer -- Set runtime path of "/usr/local/bin/mjpg_streamer" to "/usr/local/lib/mjpg-streamer" -- Installing: /usr/local/share/mjpg-streamer/www -- Installing: /usr/local/share/mjpg-streamer/www/control.htm -- Installing: /usr/local/share/mjpg-streamer/www/JQuerySpinBtn.css -- Installing: /usr/local/share/mjpg-streamer/www/jquery.ui.custom.css -- Installing: /usr/local/share/mjpg-streamer/www/stream.html -- Installing: /usr/local/share/mjpg-streamer/www/jquery.ui.widget.min.js -- Installing: /usr/local/share/mjpg-streamer/www/stream_simple.html -- Installing: /usr/local/share/mjpg-streamer/www/index.html -- Installing: /usr/local/share/mjpg-streamer/www/rotateicons.png -- Installing: /usr/local/share/mjpg-streamer/www/JQuerySpinBtn.js -- Installing: /usr/local/share/mjpg-streamer/www/fix.css -- Installing: /usr/local/share/mjpg-streamer/www/javascript_motiondetection.html -- Installing: /usr/local/share/mjpg-streamer/www/javascript.html -- Installing: /usr/local/share/mjpg-streamer/www/java_simple.html -- Installing: /usr/local/share/mjpg-streamer/www/java.html -- Installing: /usr/local/share/mjpg-streamer/www/videolan.html -- Installing: /usr/local/share/mjpg-streamer/www/sidebarbg.gif -- Installing: /usr/local/share/mjpg-streamer/www/example.jpg -- Installing: /usr/local/share/mjpg-streamer/www/LICENSE.txt -- Installing: /usr/local/share/mjpg-streamer/www/jquery.ui.tabs.min.js -- Installing: /usr/local/share/mjpg-streamer/www/static_simple.html -- Installing: /usr/local/share/mjpg-streamer/www/jquery.js -- Installing: /usr/local/share/mjpg-streamer/www/javascript_simple.html -- Installing: /usr/local/share/mjpg-streamer/www/style.css -- Installing: /usr/local/share/mjpg-streamer/www/spinbtn_updn.gif -- Installing: /usr/local/share/mjpg-streamer/www/static.html -- Installing: /usr/local/share/mjpg-streamer/www/cambozola.jar -- Installing: /usr/local/share/mjpg-streamer/www/favicon.png -- Installing: /usr/local/share/mjpg-streamer/www/jquery.rotate.js -- Installing: /usr/local/share/mjpg-streamer/www/jquery.ui.core.min.js -- Installing: /usr/local/share/mjpg-streamer/www/functions.js -- Installing: /usr/local/share/mjpg-streamer/www/java_control.html -- Installing: /usr/local/share/mjpg-streamer/www/bodybg.gif -- Installing: /usr/local/share/mjpg-streamer/www/favicon.ico -- Installing: /usr/local/lib/mjpg-streamer/input_file.so -- Installing: /usr/local/lib/mjpg-streamer/input_http.so -- Installing: /usr/local/lib/mjpg-streamer/input_raspicam.so -- Set runtime path of "/usr/local/lib/mjpg-streamer/input_raspicam.so" to "" -- Installing: /usr/local/lib/mjpg-streamer/input_ptp2.so -- Installing: /usr/local/lib/mjpg-streamer/input_uvc.so -- Installing: /usr/local/lib/mjpg-streamer/output_file.so -- Installing: /usr/local/lib/mjpg-streamer/output_http.so -- Installing: /usr/local/lib/mjpg-streamer/output_rtsp.so -- Installing: /usr/local/lib/mjpg-streamer/output_udp.so -- Installing: /usr/local/lib/mjpg-streamer/output_viewer.so make[1]: Leaving directory '/home/pi/mjpg-streamer/mjpg-streamer-experimental/_build'

[jacksonliam]

Hey, it was written for OpenCV 3.10 so maybe try that version?

It is looking for OpenCV COMPONENTS core imgproc highgui videoio

So make sure they are all included too

[ansarid]

@jacksonliam I ran sudo apt install libopencv-core-dev libopencv-videoio-dev libopencv-highgui-dev libopencv-imgproc-dev and all those packages are already installed but they are for opencv version 3.2.0. I'm having a difficult time finding a package for opencv 3.1.* for a Raspberry Pi. I'll see if I can figure that part out though.

[luxdong]

I can't get de input_opencv.so too. I make for opencv4.11, it that problem? it work only in opencv 3.10?

[pecheronza]

I'm having exactly the same issue as OP, and I can't figure out how to install version 3.1. Any news or workarounds? Thanks!

[j0e1an]

I found the solution. Please see the workaround below, cannot guarantee it will not cause any problems since mjp-streamer is written for OpenCV 3.X. Basically, the CMakefile checks if OpenCV major version equals 3 and ignore the plugin if it is anything other than OpenCV 3.X.

Edit file plugins/input_opencv/CMakeLists.txt Change MJPG_STREAMER_PLUGIN_OPTION(input_opencv "OpenCV input plugin" ONLYIF OpenCV_FOUND ${OpenCV_VERSION_MAJOR} EQUAL 3) To MJPG_STREAMER_PLUGIN_OPTION(input_opencv "OpenCV input plugin")

Similarly, edit file plugins/input_opencv/filters/cvfilter_py/CMakeLists.txt and remove the logic of checking if OpenCV major version number EQUALS 3. Change MJPG_STREAMER_PLUGIN_OPTION(cvfilter_py "OpenCV Python filter" ONLYIF OpenCV_FOUND ${OpenCV_VERSION_MAJOR} EQUAL 3) To MJPG_STREAMER_PLUGIN_OPTION(cvfilter_py "OpenCV Python filter")

make again and you should see it is enabled.

Or just fork this guy's fork https://github.com/lzmlzm/mjpg-streamer

[j0e1an]

I notice that OP might have an older version of OpenCV installed, and also pip installed OpenCV. This could cause conflicts. Try to remove the older copy and make again.

[ansarid]

@j0e1an I finally had the time to test out this solution and I was able to get my OpenCV plugin successfully working without any issues! Thank you!