OpenCV videocapture读取摄像头rtsp错误
我正在使用opencv python（版本4.4.0.46）python版本3.8.5来捕获我的IP摄像头流，但是，我无法读取视频帧。这是我的密码：OpenCV videocapture读取摄像头rtsp错误,opencv,opencv-python,Opencv,Opencv Python,我正在使用opencv python（版本4.4.0.46）python版本3.8.5来捕获我的IP摄像头流，但是，我无法读取视频帧。这是我的密码： 导入cv2 #cap=cv2.视频捕获（“rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov") cap=cv2.视频捕获（“rtsp://admin:xxx@xxx/流媒体/频道/1”） 打印（cap.isOpened（）） ret，frame=cap.read（） 打
导入cv2
#cap=cv2.视频捕获（“rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov")
cap=cv2.视频捕获（“rtsp://admin:xxx@xxx/流媒体/频道/1”）
打印（cap.isOpened（））
ret，frame=cap.read（）
打印（ret）
而ret：
ret，frame=cap.read（）
打印（ret）
如果cv2.waitKey（1）&0xFF==ord（'q'）：
打破
第1章释放（）
ffmpeg -i "rtsp://admin:xxx@xxx/Streaming/Channels/1" -y -f image2 -r 1/1 img%03d.jpg
VideoCapture VideoCapture=新的VideoCapture（）；
//将异常模式设置为true，以便在出现错误时可以打印堆栈跟踪
videoCapture.setExceptionMode（true）；
布尔值openStatus=videoCapture.open（“rtsp://admin:xxx@xxx/流媒体/频道/1”）；
log.info（“打开rtsp状态：{}”，打开状态）；
int i=0；
状态=真；
while（openStatus&&status）{
Mat Mat=新Mat（）；
视频捕获读取（mat）；
Imgcodecs.imwrite（“../”+i+“.png”，mat）；
i++；
}
更新日期：2021.01.07 感谢antoine为我提供有关OpenCV后端的信息。我尝试使用下面的代码打印python opencv构建信息
import cv2
print(cv2.getBuildInformation())
General configuration for OpenCV 4.4.0 =====================================
Version control: 4.4.0-dirty
Platform:
Timestamp: 2020-11-03T00:52:03Z
Host: Linux 4.15.0-1077-gcp x86_64
CMake: 3.18.2
CMake generator: Unix Makefiles
CMake build tool: /bin/gmake
Configuration: Release
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 (15 files): + SSSE3 SSE4_1
SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (29 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
AVX512_SKX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX
C/C++:
Built as dynamic libs?: NO
C++ standard: 11
C++ Compiler: /usr/lib/ccache/compilers/c++ (ver 9.3.1)
C++ flags (Release): -Wl,-strip-all -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 -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -Wl,-strip-all -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 -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
C Compiler: /usr/lib/ccache/compilers/cc
C flags (Release): -Wl,-strip-all -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-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -Wl,-strip-all -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-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -L/root/ffmpeg_build/lib -Wl,--gc-sections -Wl,--as-needed
Linker flags (Debug): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -L/root/ffmpeg_build/lib -Wl,--gc-sections -Wl,--as-needed
ccache: YES
Precompiled headers: NO
Extra dependencies: ade Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent /lib64/libpng.so /lib64/libz.so dl m pthread rt
3rdparty dependencies: ittnotify libprotobuf libjpeg-turbo libwebp libtiff libjasper IlmImf quirc ippiw ippicv
OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
Disabled: world
Disabled by dependency: -
Unavailable: java js python2 ts
Applications: -
Documentation: NO
Non-free algorithms: NO
GUI:
QT: YES (ver 5.15.0)
QT OpenGL support: NO
GTK+: NO
VTK support: NO
Media I/O:
ZLib: /lib64/libz.so (ver 1.2.7)
JPEG: libjpeg-turbo (ver 2.0.5-62)
WEBP: build (ver encoder: 0x020f)
PNG: /lib64/libpng.so (ver 1.5.13)
TIFF: build (ver 42 - 4.0.10)
JPEG 2000: build Jasper (ver 1.900.1)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES
avcodec: YES (58.109.100)
avformat: YES (58.61.100)
avutil: YES (56.60.100)
swscale: YES (5.8.100)
avresample: NO
GStreamer: NO
v4l/v4l2: YES (linux/videodev2.h)
Parallel framework: pthreads
Trace: YES (with Intel ITT)
Other third-party libraries:
Intel IPP: 2020.0.0 Gold [2020.0.0]
at: /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-build/3rdparty/ippicv/ippicv_lnx/icv
Intel IPP IW: sources (2020.0.0)
at: /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-build/3rdparty/ippicv/ippicv_lnx/iw
Lapack: NO
Eigen: NO
Custom HAL: NO
Protobuf: build (3.5.1)
OpenCL: YES (no extra features)
Include path: /tmp/pip-req-build-99ib2vsi/opencv/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python 3:
Interpreter: /opt/python/cp38-cp38/bin/python (ver 3.8.6)
Libraries: libpython3.8.a (ver 3.8.6)
numpy: /tmp/pip-build-env-qru8fff1/overlay/lib/python3.8/site-packages/numpy/core/include (ver 1.17.3)
install path: python
Python (for build): /bin/python2.7
Java:
ant: NO
JNI: NO
Java wrappers: NO
Java tests: NO
Install to: /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-install
-----------------------------------------------------------------
Video I/O:
DC1394: NO
FFMPEG: YES
avcodec: YES (58.109.100)
avformat: YES (58.61.100)
avutil: YES (56.60.100)
swscale: YES (5.8.100)
avresample: NO
GStreamer: NO
v4l/v4l2: YES (linux/videodev2.h)
cap = cv2.VideoCapture("rtsp://admin:xxx@xxx/Streaming/Channels/1", cv2.CAP_FFMPEG)
但是，传递参数并没有解决问题，我也无法读取视频帧。OpenCV使用不同的后端来读取/写入/编码/解码视频流，具体取决于您的计算机上安装了什么以及您使用OpenCV构建的哪个后端。 这可以解释为什么即使使用相同的OS和OpenCV版本，在不同的服务器上也会得到不同的结果：可以在其中一个服务器上使用GStreamer，而不能在另一个服务器上使用GStreamer 你可以在网上找到一些关于这些后端的信息 IIRC在Linux上，OpenCV使用GStreamer作为默认后端，您使用FFMPEG测试了流。OpenCV也可以使用FFMPEG，尝试将
cv.CAP\FFMPEGcv.VideoCapturecap = cv2.VideoCapture("rtsp://admin:xxx@xxx/Streaming/Channels/1", cv.CAP_FFMPEG)
但有些后端是，例如，您可以使用
GST\u DEBUGFFREPORTAV_LOG*cv2.getBuildInformation（）