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javacv ffmpeg使用笔记

测试过程中，发现ffmpeg-6.0-1.5.9-linux-x86_64.jar 存在问题（ffmpeg原生命令执行失败），降级到ffmpeg-5.1.2-1.5.8-linux-x86_64.jar版本正常。

<javacv.version>1.5.8</javacv.version><dependencies><dependency><groupId>org.bytedeco</groupId><artifactId>javacv</artifactId><version>${javacv.version}</version></dependency><dependency><groupId>org.bytedeco</groupId><artifactId>ffmpeg</aifactId><version>5.1.2-${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>5.1.2-${javacv.version}</version><classifier>windows-x86_64</classifier></dependency></dependencies></profile><profile><id>Mac</id><activation><os><!-- mvn enforcer:display-info --><family>mac</family></os></activation><dependencies><dependency><groupId>org.bytedeco</groupId><artifactId>ffmpeg</artifactId><version>5.1.2-${javacv.version}</version><classifier>macosx-x86_64</classifier></dependency></dependencies></profile></profiles>

1. ffmpeg

org.bytedeco.ffmpeg.ffmpeg
org.bytedeco.ffmpeg.ffprobe

• 版本号

   String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);System.out.println("ffmpeg path=>" + ffmpeg);ProcessBuilder pb = new ProcessBuilder(ffmpeg, "-version");pb.inheritIO().start().waitFor();

• 直接拼接视频（前提各个视频片段帧率等属性一致）

        // 输入视频文件路径List<String> inputFiles = Arrays.asList("video1.mp4", "video2.mp4");// 输出视频文件路径String outputFile = "output.mp4";// 拼接模板文件String modelFile = "modelFile.txt";// 创建拼接模板文件try (BufferedWriter writer = new BufferedWriter(new FileWriter(modelFile))) {for (String inputFile : inputFiles) {writer.write("file '" + inputFile + "'");writer.newLine();}} catch (IOException e) {e.printStackTrace();return;}String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);ProcessBuilder pb = new ProcessBuilder(ffmpeg,"-f", "concat","-safe", "0","-i", modelFile,"-c", "copy",outputFile);pb.inheritIO().start().waitFor();

2. ffprobe

• 版本号

    public static void main(String[] args) throws IOException, InterruptedException {String ffprobe = Loader.load(org.bytedeco.ffmpeg.ffprobe.class);System.out.println("ffprobe path=>" + ffprobe);ProcessBuilder pb = new ProcessBuilder(ffprobe, "-version");pb.inheritIO().start().waitFor();}

• 视频属性

更多用法：help、大模型
ffprobe -h topic

        String ffprobe = Loader.load(org.bytedeco.ffmpeg.ffprobe.class);ProcessBuilder pb = new ProcessBuilder(ffprobe,"-v", "error","-print_format", "json","-show_streams","video1.mp4");pb.inheritIO().start().waitFor();