VideoWriter Error

4

Success! Thank you Matti Vuori and Laurent Berger. Below the code to identify a sequence and save as video .avi.

int main()
{
std::vector< cv::String> f_BG;
glob(“C:/Users/Home/OneDrive/Desktop/BG/*.png”, f_BG, false);
std::vector< Mat> BG_images;
size_t count_BG = f_BG.size();

for (size_t p = 0; p < count_BG; p++) {
    BG_images.push_back(imread(f_BG[p], IMREAD_GRAYSCALE));
}
VideoWriter writer;
int codec = VideoWriter::fourcc('H', 'F', 'Y', 'U');
double fps = 4;                          
std::string filename = "vid.avi";  
int p=0;
writer.open(filename, codec, fps, BG_images[p].size(), false);

for (int p = 0; p < count_BG; p++)
{
    writer.write(BG_images[p]);
}
writer.release();
return 0;

}

Observation: I shoul put inside the loop as Matti sayed, I should change to use de HFYU codec for better video resolution and I should change my IMREAD to GRAYSCALE instead UNCHANGED or ANYDEPTH because the images that I am using with are PNG 16 bit.

The INFO 0 messages still remain appearing in output, example:

[ INFO:0] global C:\build\master_winpack-build-win64-vc15\opencv\modules\videoio\src\videoio_registry.cpp (197) cv::`anonymous-namespace’::VideoBackendRegistry::VideoBackendRegistry VIDEOIO: Enabled backends(8, sorted by priority): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); MSMF(970); DSHOW(960); CV_IMAGES(950); CV_MJPEG(940); UEYE(930)
[ INFO:0] global C:\build\master_winpack-build-win6