背景

之前构建过文件预览服务,对于视频局部前端播放组件限度只能为mp4格局,为了反对更多视频格式决定对计划进行降级,因为视频格式较多,针对每一种格局定制抉择播放器不太事实,决定对视频源对立转码,转码后的格局为mp4,兼容性稳固且前后端革新工作较小

配置

maven增加java-all-deps援用,该援用内置不同版本ffmpeg文件,为了防止打包后文件过大,排除不须要的平台兼容反对

        <dependency>            <groupId>ws.schild</groupId>            <artifactId>jave-all-deps</artifactId>            <version>3.3.1</version>            <exclusions>                <!--  排除windows 32位零碎      -->                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-win32</artifactId>                </exclusion>                <!--  排除linux 32位零碎      -->                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-linux32</artifactId>                </exclusion>                <!-- 排除Mac零碎-->                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-osx64</artifactId>                </exclusion>                <!-- 排除osxm-->                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-osxm1</artifactId>                </exclusion>                <!-- 排除arm-->                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-linux-arm32</artifactId>                </exclusion>                <exclusion>                    <groupId>ws.schild</groupId>                    <artifactId>jave-nativebin-linux-arm64</artifactId>                </exclusion>            </exclusions>        </dependency>

转码

次要通过执行ffmpeg转换命令进行转码,指定编码器,画质,代码通过流读取执行后果,阻塞命令以同步形式执行结束,执行结束后写入finish.txt标识,便于前端轮询视频是否转码结束,跳转播放页面

 ffmpeg -i inputpath -c:v libx264 -crf 19 -strict experimental outputpath
 ProcessWrapper ffmpeg = new DefaultFFMPEGLocator().createExecutor();                    ffmpeg.addArgument("-i");                    ffmpeg.addArgument(fileConvertInfo.getFilePath());                    ffmpeg.addArgument("-c:v");                    ffmpeg.addArgument("libx264");                    ffmpeg.addArgument("-crf");                    ffmpeg.addArgument("19");                    ffmpeg.addArgument("-strict");                    ffmpeg.addArgument("experimental");                    ffmpeg.addArgument(fileConvertInfo.getFileDirPath() + "convert.mp4");                    ffmpeg.execute();                    try (BufferedReader br = new BufferedReader(new InputStreamReader(ffmpeg.getErrorStream()))) {                        blockFfmpeg(br);                    }                    File file = new File(fileConvertInfo.getFileDirPath() + "finish.txt");                    file.createNewFile();    private static void blockFfmpeg(BufferedReader br) throws IOException {        String line;        // 该办法阻塞线程,直至合成胜利        while ((line = br.readLine()) != null) {            doNothing(line);        }    }    private static void doNothing(String line) {        System.out.println(line);    }

通过测试以下视频格式反对转码mp4

.mp4;.asf;.avi;.dat;.f4v;.flv;.mkv;.mov;.mpg;.rmvb;.ts;.vob;.webm;.wmv;.vob