javacv ffmpeg利用笔记 (补充中...)
一、maven依靠利用javacv ffmpeg并指定classifier之后，就不必要额外安装ffmpeg软件（jar包中已经内置）了。
[*]全量依靠包（不推荐）安装包总巨细高出1G
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv-platform</artifactId>
<version>${javacv.version}</version>
</dependency>
[*]最小化安装
可利用mvn enforcer:display-info 检察当前操作系统信息
https://img-blog.csdnimg.cn/direct/659c0e9176d24da686a3fdd726b57817.png
<javacv.version>1.5.9</javacv.version>
<dependencies>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>${javacv.version}</version>
</dependency>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>ffmpeg</artifactId>
<version>6.0-${javacv.version}</version>
<classifier>linux-x86_64</classifier>
</dependency>
</dependencies>
<profiles>
<profile>
<id>Windows</id>
<activation>
<os>
<!-- mvn enforcer:display-info -->
<family>windows</family>
</os>
</activation>
<dependencies>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>ffmpeg</artifactId>
<version>6.0-${javacv.version}</version>
<classifier>windows-x86_64</classifier>
</dependency>
</dependencies>
</profile>
<profile>
<id>Mac</id>
<activation>
<os>
<!-- mvn enforcer:display-info -->
<family>mac</family>
</os>
</activation>
<dependencies>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>ffmpeg</artifactId>
<version>6.0-${javacv.version}</version>
<classifier>macosx-x86_64</classifier>
</dependency>
</dependencies>
</profile>
</profiles>
https://img-blog.csdnimg.cn/direct/e04f259db0374b5cb4b29f2290aa89f5.png
二、示例代码
1. 获取视频时长
public static void videoDuration(String videoFilePath) {
try (FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(videoFilePath)) {
frameGrabber.start();
int duration = frameGrabber.getLengthInVideoFrames()/ (int) frameGrabber.getFrameRate();
System.out.println(duration);
frameGrabber.stop();
} catch (FrameGrabber.Exception e) {
e.printStackTrace();
}
}
三、小本领
[*]日记级别
static {
avutil.av_log_set_level(avutil.AV_LOG_DEBUG);
FFmpegLogCallback.set();
}
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