frame chopper

        <maven.compiler.source>17</maven.compiler.source>

        <maven.compiler.target>17</maven.compiler.target>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <exec.mainClass>top.BackendJava</exec.mainClass>

        <!-- <exec.mainClass>top.BackendJava</exec.mainClass> -->

        <!-- <exec.mainClass>yolo.YOLODetector</exec.mainClass> -->

        <exec.mainClass>vid2frames.Vid2Frames</exec.mainClass>

    </properties>

    <build>

            </exclusions>

        </dependency>

    </dependencies>

</project>

import org.bytedeco.javacv.FFmpegFrameGrabber;

import org.bytedeco.javacv.Frame;

import org.bytedeco.javacv.Java2DFrameConverter;

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

public class Vid2Frames {

    public static void main(String[] args) {

        String videoFilePath = "src/main/java/vid2frames/input_video.mov";

        String outputDirPath = "src/main/java/vid2frames/frames";

        File outputDir = new File(outputDirPath);

        if (!outputDir.exists()) {

            outputDir.mkdirs();

        }

        extractFrames(videoFilePath, outputDirPath);

    }

    private static void extractFrames(String videoFilePath, String outputDirPath) {

        try (FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(videoFilePath)) {

            frameGrabber.start();

            Java2DFrameConverter converter = new Java2DFrameConverter();

            Frame frame;

            int frameNumber = 0;

            // Frame rate of the video file

            double frameRate = frameGrabber.getFrameRate();

            // Interval to capture the frame (every 0.2 seconds for 5 frames per second)

            int frameInterval = (int) Math.round(frameRate / 5);

            while ((frame = frameGrabber.grabFrame()) != null) {

                if (frame.image != null) {

                    if (frameNumber % frameInterval == 0) {

                        BufferedImage bi = converter.convert(frame);

                        String path = String.format("%s/frame_%d.png", outputDirPath, frameNumber);

                        ImageIO.write(bi, "png", new File(path));

                        System.out.println("Saved: " + path);

                    }

                    frameNumber++;

                }

            }

            frameGrabber.stop();

        } catch (IOException | FFmpegFrameGrabber.Exception e) {

            e.printStackTrace();

        }

    }

}