Hi,
I’m trying to deploy a RTSP server with OpenCV and VideoWriter in Windows.
For doing that I read that I have to rebuild OpenCv from source.
I have follow this link to make OpenCv works in VisualStudio.
To make it work I have to copy manually all dlls in Release folder including all gstreamer dlls.
At this time it seems that I have OpenCv running.
I have done a little example to read some streaming using VideoCapture and VideoWriter as RTSP server.
Here is my source code. It seems that writer is failing to open (see above).
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main()
{
std::cout << cv::getBuildInformation();
string command = "appsrc ! videoconvert ! mfxh264enc ! video/x-h264, stream-format=byte-stream, profile=baseline ! send-config=true rtph264pay pt=96 ! udpsink host=127.0.0.1 port=5004";
cv::VideoCapture cap;
cap.open("http://pendelcam.kip.uni-heidelberg.de/mjpg/video.mjpg");
double fps = cap.get(CAP_PROP_FPS);
cv::VideoWriter writer;
cout << "FPS " << fps;
cv::Size size = cv::Size(1280, 720);
writer.open(command, cv::CAP_GSTREAMER, 0, fps, size, true);
while (cap.isOpened()) {
cv:Mat img;
cap.read(img);
writer.write(img);
cv::imshow("frame", img);
if (cv::waitKey(1) > 0)
break;
}
cap.release();
writer.release();
}
GetBuildInformation()
General configuration for OpenCV 4.9.0 =====================================
Version control: unknown
Platform:
Timestamp: 2024-04-09T09:02:25Z
Host: Windows 10.0.19044 AMD64
CMake: 3.29.1
CMake generator: Visual Studio 17 2022
CMake build tool: C:/Program Files/Microsoft Visual Studio/2022/Professional/MSBuild/Current/Bin/amd64/MSBuild.exe
MSVC: 1939
Configuration: Debug 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 (18 files): + SSSE3 SSE4_1
SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (9 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (38 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
AVX512_SKX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX
C/C++:
Built as dynamic libs?: YES
C++ standard: 11
C++ Compiler: C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe (ver 19.39.33523.0)
C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /O2 /Ob2 /DNDEBUG
C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /Zi /Ob0 /Od /RTC1
C Compiler: C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe
C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /O2 /Ob2 /DNDEBUG
C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /Zi /Ob0 /Od /RTC1
Linker flags (Release): /machine:x64 /INCREMENTAL:NO
Linker flags (Debug): /machine:x64 /debug /INCREMENTAL
ccache: NO
Precompiled headers: YES
Extra dependencies:
3rdparty dependencies:
OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching ts video videoio
Disabled: world
Disabled by dependency: -
Unavailable: java python2
Applications: tests perf_tests apps
Documentation: NO
Non-free algorithms: NO
Windows RT support: NO
GUI: WIN32UI
Win32 UI: YES
VTK support: NO
Media I/O:
ZLib: build (ver 1.3)
JPEG: build-libjpeg-turbo (ver 2.1.3-62)
SIMD Support Request: YES
SIMD Support: NO
WEBP: build (ver encoder: 0x020f)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.2.0)
JPEG 2000: build (ver 2.5.0)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (58.134.100)
avformat: YES (58.76.100)
avutil: YES (56.70.100)
swscale: YES (5.9.100)
avresample: YES (4.0.0)
GStreamer: YES (1.24.1)
DirectShow: YES
Media Foundation: YES
DXVA: YES
Parallel framework: Concurrency
Trace: YES (with Intel ITT)
Other third-party libraries:
Intel IPP: 2021.11.0 [2021.11.0]
at: C:/CMake/opencv/opencv/build/3rdparty/ippicv/ippicv_win/icv
Intel IPP IW: sources (2021.11.0)
at: C:/CMake/opencv/opencv/build/3rdparty/ippicv/ippicv_win/iw
Lapack: NO
Eigen: YES (ver 3.4.0)
Custom HAL: NO
Protobuf: build (3.19.1)
Flatbuffers: builtin/3rdparty (23.5.9)
OpenCL: YES (NVD3D11)
Include path: C:/CMake/opencv/opencv/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python 3:
Interpreter: C:/Program Files/Python312/python.exe (ver 3.12.2)
Libraries: C:/Program Files/Python312/libs/python312.lib (ver 3.12.2)
numpy: C:/Users/JuanDYB/AppData/Roaming/Python/Python312/site-packages/numpy/core/include (ver 1.26.4)
install path: C:/Program Files/Python312/Lib/site-packages/cv2/python-3.12
Python (for build): C:/Program Files/Python312/python.exe
Java:
ant: NO
Java: NO
JNI: NO
Java wrappers: NO
Java tests: NO
Install to: C:/CMake/opencv/opencv/build/install
-----------------------------------------------------------------
Error on VideoWriter
[ WARN:0@0.957] global cap_gstreamer.cpp:2250 cv::CvVideoWriter_GStreamer::close_ OpenCV | GStreamer warning: No source in GStreamer pipeline. Ignore
[ERROR:0@0.960] global cap.cpp:645 cv::VideoWriter::open VIDEOIO(GSTREAMER): raised OpenCV exception:
OpenCV(4.9.0) C:\CMake\opencv\opencv\modules\videoio\src\cap_gstreamer.cpp:154: error: (-215:Assertion failed) ptr in function 'cv::`anonymous-namespace'::GSafePtr<struct _GstElement>::get'
Also I’m not sure how to check if it’s working with VLC.
I read that I have to open an sdp file like this. I don’t know if opening rtsp://127.0.0.1:5004/ will work.
c=IN IP4 127.0.0.1
m=video 5004 RTP/AVP 96
a=rtpmap:96 H264/90000
Note: I’m not a C++ developer I would like to make this on C# but at the moment is that I have. I’m running this on a clean Windows HyperV machine with firewall disabled.
Thanks for your help.