FFMPEG 截取RTMP直播流图片命令

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CentOS 6.5 yum安装FFMPEG步骤

1. 手动添加yum源配置

vi /etc/yum.repos.d/dag.repo

[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=0
enabled=1

2.安装

yum -y install ffmpeg

ffmpeg截图

ffmpeg -i "rtmp://10.1.1.31/live/test live=1" -f image2 -ss 0 -vframes 1 -s 220*220 /tmp/a.jpg

3.Java调用命令行执行截图操作

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;public class Main {    public static void main(String[] args) {        for (String arg : args) {            System.out.println(arg);        }        ProcessBuilder builder = new ProcessBuilder();        builder.command("ffmpeg", "-i", "rtmp://10.1.1.31/live/test live=1", "-f", "image2", "-ss",            "0", "-vframes", "1", "-s", args[0], "/tmp/fish/a.jpg");        builder.redirectErrorStream(false);        try {            Process process = builder.start();            InputStream in = process.getInputStream();            System.out.println("正在进行截图，请稍候=======================");            convertStreamToString(in);            System.out.println("");            InputStream errorStream = process.getErrorStream();            if (errorStream != null && errorStream.read() > 0) {                System.out.println("错误：");                convertStreamToString(errorStream);            }            in.close();        } catch (IOException e) {            System.out.println("错误：");            e.printStackTrace();        }    }    public static String convertStreamToString(InputStream is) {        BufferedReader reader = new BufferedReader(new InputStreamReader(is));        StringBuilder sb = new StringBuilder();        String line = null;        try {            while ((line = reader.readLine()) != null) {                System.out.println(line);                sb.append(line + "/n");            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return sb.toString();    }}

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