RTSP и OpenCV

cam = cv2.CascadeClassifier("rtsp://admin:888888@192.168.1.40:10544/udp/av0_0")

VIDEOIO ERROR: V4L: device rtsp://admin:888888@192.168.1.40:10544/udp/av0_0: Unable to query number of channels
OpenCV(3.4.1) Error: Unspecified error (GStreamer: unable to start pipeline
) in cvCaptureFromCAM_GStreamer, file /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp, line 890
VIDEOIO(cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename)): raised OpenCV exception:

OpenCV(3.4.1) /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp:890: error: (-2) GStreamer: unable to start pipeline
 in function cvCaptureFromCAM_GStreamer

CvCapture_OpenNI::CvCapture_OpenNI : Failed to open input file (rtsp://admin:888888@192.168.1.40:10544/udp/av0_0): Bad file extension
OpenCV(3.4.1) Error: Assertion failed (scn == 3 || scn == 4) in cvtColor, file /builddir/build/BUILD/opencv-3.4.1/modules/imgproc/src/color.cpp, line 11147
Traceback (most recent call last):
  File "/mnt/Test/pyface/recognizer.py", line 13, in <module>
    gray = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)
cv2.error: OpenCV(3.4.1) /builddir/build/BUILD/opencv-3.4.1/modules/imgproc/src/color.cpp:11147: error: (-215) scn == 3 || scn == 4 in function cvtColor


Process finished with exit code 1

python3 -c "import cv2; print(cv2.getBuildInformation())"

General configuration for OpenCV 3.4.1 =====================================
  Version control:               unknown

  Extra modules:
    Location (extra):            /builddir/build/BUILD/opencv-3.4.1/opencv_contrib-3.4.1/modules
    Version control (extra):     unknown

  Platform:
    Timestamp:                   2018-04-16T03:01:29Z
    Host:                        Linux 4.15.3-300.fc27.x86_64 x86_64
    CMake:                       3.11.0
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/gmake
    Configuration:               ReleaseWithDebInfo

  CPU/HW features:
    Baseline:                    SSE SSE2 SSE3
      requested:                 SSE3
    Dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
      requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
      SSE4_1 (3 files):          + SSSE3 SSE4_1
      SSE4_2 (1 files):          + SSSE3 SSE4_1 POPCNT SSE4_2
      FP16 (2 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
      AVX (4 files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
      AVX2 (8 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
      AVX512_SKX (0 files):      + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_SKX

  C/C++:
    Built as dynamic libs?:      YES
    C++11:                       YES
    C++ Compiler:                /usr/bin/c++  (ver 8.0.1)
    C++ flags (Release):         -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -mcet -fcf-protection -Wl,--as-needed   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wno-implicit-fallthrough -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -mcet -fcf-protection -Wl,--as-needed   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wno-implicit-fallthrough -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -g  -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -mcet -fcf-protection -Wl,--as-needed   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wno-implicit-fallthrough -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fopenmp -DNDEBUG  -DNDEBUG
    C flags (Debug):             -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -mcet -fcf-protection -Wl,--as-needed   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wno-implicit-fallthrough -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fopenmp -g  -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,-z,relro  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld   
    Linker flags (Debug):        -Wl,-z,relro  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld   
    ccache:                      NO
    Precompiled headers:         NO
    Extra dependencies:          dl pthread rt /lib64/libGL.so /lib64/libGLU.so /lib64/libtbb.so ClpSolver Clp CoinUtils bz2 z m
    3rdparty dependencies:

  OpenCV modules:
    To be built:                 aruco bgsegm bioinspired calib3d ccalib core cvv datasets dpm face features2d flann freetype fuzzy hdf hfs highgui img_hash imgcodecs imgproc java_bindings_generator line_descriptor ml objdetect optflow phase_unwrapping photo plot python2 python3 python_bindings_generator reg rgbd saliency shape stereo stitching structured_light superres surface_matching tracking ts video videoio videostab ximgproc xobjdetect xphoto
    Disabled:                    js world
    Disabled by dependency:      dnn_objdetect sfm text
    Unavailable:                 cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java matlab ovis viz
    Applications:                tests perf_tests examples apps
    Documentation:               doxygen python
    Non-free algorithms:         NO

  GUI: 
    QT:                          YES (ver 5.10.1)
      QT OpenGL support:         YES (Qt5::OpenGL 5.10.1)
    GTK+:                        NO
    OpenGL support:              YES (/lib64/libGL.so /lib64/libGLU.so)
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /lib64/libz.so (ver 1.2.11)
    JPEG:                        /lib64/libjpeg.so (ver )
    WEBP:                        /lib64/libwebp.so (ver encoder: 0x020e)
    PNG:                         /lib64/libpng.so (ver 1.6.34)
    TIFF:                        /lib64/libtiff.so (ver 42 / 4.0.9)
    JPEG 2000:                   /lib64/libjasper.so (ver 2.0.14)
    OpenEXR:                     /lib64/libImath.so /lib64/libIlmImf.so /lib64/libIex.so /lib64/libHalf.so /lib64/libIlmThread.so (ver 2.2.0)
    GDAL:                        YES (/lib64/libgdal.so)
    GDCM:                        YES (ver 2.8.4)

  Video I/O:
    DC1394:                      YES (ver 2.2.2)
    GStreamer:                   
      base:                      YES (ver 1.14.0)
      video:                     YES (ver 1.14.0)
      app:                       YES (ver 1.14.0)
      riff:                      YES (ver 1.14.0)
      pbutils:                   YES (ver 1.14.0)
    OpenNI:                      YES (ver 1.5.7, build 10)
    OpenNI PrimeSensor Modules:  YES (/lib64/libXnCore.so)
    UniCap:                      YES (ver 0.9.12)
    UniCap ucil:                 YES (ver 0.9.10)
    libv4l/libv4l2:              1.12.5 / 1.12.5
    v4l/v4l2:                    linux/videodev2.h
    Intel Media SDK:             NO
    gPhoto2:                     YES

  Parallel framework:            TBB (ver 2018.0 interface 10002)

  Trace:                         YES (built-in)

  Other third-party libraries:
    VA:                          YES
    Lapack:                      YES (/lib64/libopenblas.so)
    Eigen:                       YES (ver 3.3.4)
    Custom HAL:                  NO
    Protobuf:                    /lib64/libprotobuf.so (3.5.0)

  NVIDIA CUDA:                   NO

  OpenCL:                        YES (no extra features)
    Include path:                /builddir/build/BUILD/opencv-3.4.1/3rdparty/include/opencl/1.2
    Link libraries:              Dynamic load

  Python 2:
    Interpreter:                 /usr/bin/python2.7 (ver 2.7.14)
    Libraries:                   /lib64/libpython2.7.so (ver 2.7.14)
    numpy:                       /usr/lib64/python2.7/site-packages/numpy/core/include (ver 1.14.1)
    packages path:               lib64/python2.7/site-packages

  Python 3:
    Interpreter:                 /usr/bin/python3 (ver 3.6.5)
    Libraries:                   /lib64/libpython3.6m.so (ver 3.6.5)
    numpy:                       /usr/lib64/python3.6/site-packages/numpy/core/include (ver 1.14.1)
    packages path:               lib64/python3.6/site-packages

  Python (for build):            /usr/bin/python2.7
    Pylint:                      /usr/bin/pylint (ver: 1.7.5, checks: 116)

  Java:                          
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Matlab:                        NO

  Install to:                    /usr
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