import com.googlecode.javacv.cpp.opencv_highgui;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.highgui.Highgui;
import org.opencv.highgui.VideoCapture;
/**
* Created by fang on 17-4-6.
* 實(shí)現(xiàn)每播放一秒視頻就截取一張圖片保存到本地的操作
* 沒有使用ffmpeg,則只能讀取avi格式視頻
* 下載google javcv.jar
* sudo add-apt-repository ppa:kirillshkrogalev/ffmpeg-next
* sudo apt-get update
* sudo apt-get install ffmpeg
* /home/fang/BigDataSoft/opencv-2.4.13/3rdparty/ffmpeg中有opencv_ffmpeg_64.dll文件
* 不能解析視頻,提示moov atom not found 是文件有錯(cuò)
*/
public class GetFrameFormVideo {
public static void main(String[] args) {
// System.out.println("Welcome to OpenCV " + Core.VERSION);
// System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
// Mat m = Mat.eye(3, 3, CvType.CV_8UC1);
// System.out.println("m = " + m.dump());
//加載本地的OpenCV庫(kù)，這樣就可以用它來調(diào)用Java API
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
run2();
}
public static void run2() {
//讀取視頻文件
VideoCapture cap = new VideoCapture("/home/fang/Downloads/src_11.mp4");
System.out.println(cap.isOpened());
//判斷視頻是否打開
if (cap.isOpened()) {
//總幀數(shù)
double frameCount = cap.get(opencv_highgui.CV_CAP_PROP_FRAME_COUNT);
System.out.println("視頻總幀數(shù):"+frameCount);
//幀率
double fps = cap.get(opencv_highgui.CV_CAP_PROP_FPS);
System.out.println("視頻幀率"+fps);
//時(shí)間長(zhǎng)度
double len = frameCount / fps;
System.out.println("視頻總時(shí)長(zhǎng):"+len);
Double d_s = new Double(len);
System.out.println(d_s.intValue());
Mat frame = new Mat();
for (int i = 0; i < d_s.intValue(); i++) {
//設(shè)置視頻的位置(單位:毫秒)
cap.set(opencv_highgui.CV_CAP_PROP_POS_MSEC, i * 1000);
//讀取下一幀畫面
if (cap.read(frame)) {
System.out.println("正在保存");
//保存畫面到本地目錄
Highgui.imwrite("/home/fang/images/" + i + ".jpg", frame);
}
}
//關(guān)閉視頻文件
cap.release();
}
}
}