write video partition ie:10 min with opencv in qthread

[RahibeMeryem]

Hi,

I want to write videos as 10 min long or a certtain frame count and than want to change file name ie:date_time dynamically.

I am using QThread and moving my class to it.:

#include "videowriter.h"

using namespace cv;

CamVideoWriter::CamVideoWriter(QObject *parent) : QObject (parent)
{

    video_writer = new VideoWriter;
    video_writer->open("outcpp.avi",CV_FOURCC('M','J','P','G'),25, Size(1280,720)) ;
}
CamVideoWriter::~CamVideoWriter() {
    exit;
}

void CamVideoWriter::FrameWriter(const cv::Mat &frame)
{
    if (video_writer->isOpened()) {

            video_writer->write(frame);

}



}

How can I change the file name dynamically if a I wrote a certain amount of frame ?

Best

[Kent-Dorfman]

I believe you must close video_writer and open an new one with a different name. you don't mention whether you expect to use a single QThread for all writing or spawn a new QThread each time the video file name changes.