在利用FFmpegFrameGrabber处理视频流,将视频一帧一帧取出来的过程中
遇到一个报错:Could not initialize class org.bytedeco.javacpp.avutil
网上查找资料发现是少引入了包
但是增加之后又会有其他的报错,如:Exception in thread "main" java.lang.NoClassDefFoundError: org/bytedeco/javacpp/PointerScope
查来查去,发现是由于依赖包之间不匹配导致,修改成一致之后解决:
我是引入了下面两个就没问题了:
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>1.4.3</version>
</dependency>
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>ffmpeg-platform</artifactId>
<version>4.0.2-1.4.3</version>
</dependency>
可以从这里查看对应版本:
附视频流截取帧的核心代码:
FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(new File(System.getProperty("user.dir") + "/test.h264"));
frameGrabber.setFrameRate(100);
frameGrabber.setFormat("h264");
frameGrabber.setVideoBitrate(15);
frameGrabber.setVideoOption("preset", "ultrafast");
frameGrabber.setNumBuffers(25000000);
Java2DFrameConverter converter = new Java2DFrameConverter();
frameGrabber.start();
Frame frame = frameGrabber.grab();
BufferedImage bufferedImage = converter.convert(frame);
File file = new File(System.getProperty("user.dir") + "/temp/image_" + count + ".jpg");
ImageIO.write(bufferedImage, "jpg", file);
baos.flush();
baos.close();