Hi,
I've written the following code so as to load a mp4 video into VideoCapture, however, when I check the capture with `isOpened()` I get false . I'm 100% sure that the mp4 file is within the folder but my code is not able to open the capture.
#include // for standard I/O
#include // Basic OpenCV structures (cv::Mat, Scalar)
#include // Gaussian Blur
#include // OpenCV window I/O
#include
#include
using namespace std;
using namespace cv;
int loadVideo( VideoCapture cap1, int seek_step,int thrd){
int frameNum = 0;
Mat frame;
char c;
cap1.set(CV_CAP_PROP_POS_FRAMES, seek_step );
while (1){
cap1 >> frame;
if (frame.empty())
{
cout << " <<< Channel stream ended! >>> ";
break;
}
cout << frameNum << endl;
++frameNum;
}
return frameNum;
}
int main(int argc, char *argv[])
{
string sourceVideoPath;
sourceVideoPath = "/home/azdoud/case1_320_200/case320_200fps20.mp4";
// sourceVideoPath = "case320_240fps20.mp4";
// sourceVideoPath = "C:\\opencvVid\\case1_320_240\\vid320_240fps25.mp4";
// sourceVideoPath = argv[1];
//start a new VideoCapture object in each of your 4 threads
VideoCapture cap1(sourceVideoPath);
cout << "Stream frame numbre : " << cap1.get(CV_CAP_PROP_FRAME_COUNT)<
#include
#include
#include
#include
using namespace std;
using namespace cv;
int main()
{
Mat src;
/// Load image
src = imread( "/home/azdoud/im.jpg");
// src = imread( "C:\\opencvVid\\images\\1.png" );
cout << "Width : " << src.size().width << endl;
cout << "Height: " << src.size().height << endl;
return 0;
}
this the result
[azdoud@video-processor CentOSsimple]$ cmake -DCMAKE_CXX_FLAGS="-std=c++11"
-- Configuring done
-- Generating done
-- Build files have been written to: /home/azdoud/CentOSsimple
[azdoud@video-processor CentOSsimple]$ make
Scanning dependencies of target main
[100%] Building CXX object CMakeFiles/main.dir/main.cpp.o
Linking CXX executable main
[100%] Built target main
[azdoud@video-processor CentOSsimple]$ ./main
Width : 0
Height: 0
you may tell is a probelm of permission, I've checked that too by setting chmod to 666 on the folder and on mp4 file. How can you explain this, I can't understand why
any help thank you in advance.
here the `getBuildInformation()` output
[azdoud@video-processor CentOSsimple]$ cmake -DCMAKE_CXX_FLAGS="-std=c++11"
-- Configuring done
-- Generating done
-- Build files have been written to: /home/azdoud/CentOSsimple
[azdoud@video-processor CentOSsimple]$ make
Scanning dependencies of target main
[100%] Building CXX object CMakeFiles/main.dir/main.cpp.o
Linking CXX executable main
[100%] Built target main
[azdoud@video-processor CentOSsimple]$ ./main
Built info
General configuration for OpenCV 2.4.8.2 =====================================
Version control: 2.4.8.2
Platform:
Host: Linux 3.10.0-693.21.1.el7.x86_64 x86_64
CMake: 2.8.12.2
CMake generator: Unix Makefiles
CMake build tool: /bin/gmake
Configuration: RELEASE
C/C++:
Built as dynamic libs?: YES
C++ Compiler: /bin/c++ (ver 4.8.5)
C++ flags (Release): -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -DNDEBUG
C++ flags (Debug): -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O0 -DDEBUG -D_DEBUG
C Compiler: /bin/cc
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release):
Linker flags (Debug):
Precompiled headers: YES
OpenCV modules:
To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib stitching superres ts videostab
Disabled: world
Disabled by dependency: -
Unavailable: androidcamera dynamicuda java python
GUI:
QT: NO
GTK+ 2.x: YES (ver 2.24.31)
GThread : YES (ver 2.54.2)
GtkGlExt: NO
OpenGL support: NO
Media I/O:
ZLib: /lib64/libz.so (ver 1.2.7)
JPEG: libjpeg (ver 62)
PNG: /lib64/libpng.so (ver 1.5.13)
TIFF: build (ver 42 - 4.0.2)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
Video I/O:
DC1394 1.x: NO
DC1394 2.x: NO
FFMPEG: NO
codec: NO
format: NO
util: NO
swscale: NO
gentoo-style: NO
GStreamer: NO
OpenNI: NO
OpenNI PrimeSensor Modules: NO
PvAPI: NO
GigEVisionSDK: NO
UniCap: NO
UniCap ucil: NO
V4L/V4L2: NO/YES
XIMEA: NO
Xine: NO
Other third-party libraries:
Use IPP: NO
Use Eigen: NO
Use TBB: NO
Use OpenMP: NO
Use GCD NO
Use Concurrency NO
Use C=: NO
Use Cuda: NO
Use OpenCL: YES
OpenCL:
Version: dynamic
Include path: /opt/working/opencv/3rdparty/include/opencl/1.2
Use AMD FFT: NO
Use AMD BLAS: NO
Python:
Interpreter: /bin/python2 (ver 2.7.5)
Java:
ant: NO
JNI: NO
Java tests: NO
Documentation:
Build Documentation: NO
Sphinx: NO
PdfLaTeX compiler: NO
Tests and samples:
Tests: YES
Performance tests: YES
C/C++ Examples: NO
Install path: /usr/local
cvconfig.h is in: /opt/working/opencv/release
-----------------------------------------------------------------
Stream frame numbre : 0
Could not open video case320_240fps20.mp4
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