使用ffmpeg获取视频时长等

最新推荐文章于 2025-07-04 08:57:46 发布

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本文介绍如何使用FFmpeg命令行工具获取视频的基本信息，包括视频时长、开始时间及比特率等关键参数，并提供了一段Java代码示例，用于演示如何通过编程方式解析这些信息。

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查看视频信息的命令：ffmpeg -i 视频文件，如下：

ffmpeg -i d://a.mp4

控制台输出

ffmpeg version N-89471-g88e2dc7d04 Copyright (c) 2000-2017 the FFmpeg developers

  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --e
nable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libblur
ay --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopu
s --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --ena
ble-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-lib
x264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-z
lib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-amf --enable-cu
da --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisyn
th --enable-libmfx
  libavutil      56.  5.100 / 56.  5.100
  libavcodec     58.  6.103 / 58.  6.103
  libavformat    58.  3.100 / 58.  3.100
  libavdevice    58.  0.100 / 58.  0.100
  libavfilter     7.  7.100 /  7.  7.100
  libswscale      5.  0.101 /  5.  0.101
  libswresample   3.  0.101 /  3.  0.101
  libpostproc    55.  0.100 / 55.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd://a.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : www.aliyun.com - Media Transcoding
  Duration: 00:05:29.20, start: 0.000000, bitrate: 377 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x360,
340 kb/s, 20 fps, 20 tbr, 10240 tbn, 40 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, flt
p, 31 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
At least one output file must be specified

关键是这一句，包含了视频时长、开始时间与比特率

Duration: 00:05:29.20, start: 0.000000, bitrate: 377 kb/s

可以根据以下java代码来获取时长

import org.junit.Test;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class TestMp4 {
    @Test
    public void test() {
        getVideoTime("d://c.wmv");
    }

    /**
     * 获取视频总时间
     */
    private void getVideoTime(String video_path) {
        List<String> commands = new ArrayList<>();
        commands.add("ffmpeg");
        commands.add("-i");
        commands.add(video_path);
        try {
            ProcessBuilder builder = new ProcessBuilder();
            builder.command(commands);
            Process p = builder.start();

            //从输入流中读取视频信息
            BufferedReader br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
            StringBuilder stringBuilder = new StringBuilder();
            String line = "";
            while ((line = br.readLine()) != null) {
                stringBuilder.append(line);
            }
            br.close();

            //从视频信息中解析时长
            String regexDuration = "Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";
            Pattern pattern = Pattern.compile(regexDuration);
            Matcher m = pattern.matcher(stringBuilder.toString());
            if (m.find()) {
                int time = getTimelen(m.group(1));
                System.out.println("视频时长：" + time + "s , 开始时间：" + m.group(2) + ", 比特率：" + m.group(3) + "kb/s");
            }

            String regexVideo = "Video: (.*?), (.*?), (.*?)[,\\s]";
            pattern = Pattern.compile(regexVideo);
            m = pattern.matcher(stringBuilder.toString());
            if (m.find()) {
                System.out.println("编码格式：" + m.group(1) + ", 视频格式：" + m.group(2) + ", 分辨率：" + m.group(3) + "kb/s");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 格式:"00:00:10.68"
    private int getTimelen(String timelen) {
        int min = 0;
        String strs[] = timelen.split(":");
        if (strs[0].compareTo("0") > 0) {
            // 秒
            min += Integer.valueOf(strs[0]) * 60 * 60;
        }
        if (strs[1].compareTo("0") > 0) {
            min += Integer.valueOf(strs[1]) * 60;
        }
        if (strs[2].compareTo("0") > 0) {
            min += Math.round(Float.valueOf(strs[2]));
        }
        return min;
    }
}

输出

视频时长：329s , 开始时间：0.000000, 比特率：377kb/s
编码格式：h264 (High) (avc1 / 0x31637661), 视频格式：yuv420p, 分辨率：640x360kb/s

参考：http://liang100100.iteye.com/blog/2215439