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