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:
<groupId>org.bytedeco</groupId> <artifactId>javacv</artifactId> <groupId>org.bytedeco.javacpp-presets</groupId> <artifactId>ffmpeg-platform</artifactId> <version>4.0.2-1.4.3</version>
可以从这里查看对应版本:
http:///download/
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(); 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);
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