ffmpeg视频转码相关

获取视频时长

//    Duration: 00:00:30.03, start: 0.000000, bitrate: 1191 kb/s
    public String getVideoDuration(String inputFilePath) {
        Process process = null;
        try {
            // 定义远程视频的URL
            // 构建FFmpeg命令
            ProcessBuilder processBuilder = new ProcessBuilder(ffmpegPath, "-i",inputFilePath);
            // 读取FFmpeg的输出信息
            // 创建ProcessBuilder并执行命令
            processBuilder.redirectErrorStream(true);
            process = processBuilder.start();
            // 读取FFmpeg命令输出
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                if (line.contains("Duration:")) {
                    // 获取包含视频时长信息的行
                    String durationLine = line.split("Duration:")[1].split(",")[0].split("\\.")[0].trim();// 00:00:30
//                    String durationLine = line.split("Duration:")[1].split(",")[0].trim();// 00:00:30.03
//                    String[] durationParts = durationLine.split(":");
//                    int hours = Integer.parseInt(durationParts[0].trim());
//                    int minutes = Integer.parseInt(durationParts[1].trim());
//                    double seconds = Double.parseDouble(durationParts[2].trim());
//                    // 计算总秒数
//                    double totalSeconds = hours * 3600 + minutes * 60 + seconds;
                    System.out.println("视频时长：" + durationLine);
                    return durationLine;
                }
            }
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
            if (process != null) {
                process.destroyForcibly();  // 如果发生异常，强制终止进程
            }
        } finally {
            if (process != null) {
                process.destroyForcibly();  // 强制终止进程
            }
        }
        System.out.println("无法获取视频时长。");
        return null;
    }

	public Integer getVideoDurationSecond(String inputFilePath) {
        String videoDuration = getVideoDuration(inputFilePath);
        if (videoDuration == null) {
            return 0;
        }
        String[] durationParts = videoDuration.split(":");
        int hours = Integer.parseInt(durationParts[0].trim());
        int minutes = Integer.parseInt(durationParts[1].trim());
        int seconds = Integer.parseInt(durationParts[2].trim());
        // 计算总秒数
        return hours * 3600 + minutes * 60 + seconds;
    }

视频转码

	public void transcodeVideo(String inputFilePath, String outputFilePath) {
        ProcessBuilder processBuilder = new ProcessBuilder(ffmpegPath, "-i",inputFilePath, "-c:v", "libx264", "-c:a", "aac", outputFilePath);
        try {
            processBuilder.inheritIO(); // 将FFmpeg的输出信息打印到控制台
//            processBuilder.redirectErrorStream(true); // 合并错误输出流
            Process process = processBuilder.start();

            int exitCode = process.waitFor();
            if (exitCode == 0) {
                log.info("视频转码成功！");
            } else {
                log.info("视频转码失败！");
            }
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }

参数后续……