问题描述

我已经在 Centos 6 机器的根目录上成功安装了 FFMpeg (https://trac.ffmpeg.org/wiki/CompilationGuide/Centos).

I have installed successfully installed FFMpeg on root of my Centos 6 machine (https://trac.ffmpeg.org/wiki/CompilationGuide/Centos).

我的 apache/php 工作场所是/var/www/html

My workplace of apache/php is /var/www/html

现在我在/var/www/html 目录上成功运行以下命令以从视频文件中捕获帧.它正在捕获一帧.

Now I'm running below command successfully on /var/www/html directory to capture frame from the video file. It's capturing a frame.

[root@localhost html]# ffmpeg -i video.mpg -an -ss 30  -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg -s 160x100 frame8  2>&1

我想通过 php 并使用 shell_exec() 或 exec() php 函数运行此命令.我用于运行命令的 php 代码是:

I want to run this command through php and using shell_exec() or exec() php functions. My php code for running the command is:

$cmd = "/root/bin/ffmpeg -i /project/app/webroot/videos/video.mpg -ss 00:00:14.435 -f image2 -vframes 1 /project/app/webroot/videothumbnails/example-thumb.jpg";
$locale = 'en_IN.UTF-8';
setlocale(LC_ALL, $locale);
putenv('LC_ALL='.$locale);
echo shell_exec($cmd);

当我尝试通过上面的 php 代码运行命令时，出现以下错误:

When I'm trying to run command through above php code, I'm getting below error:

sh: ffmpeg: command not found

请帮我解决这个问题.

推荐答案

对于视频缩略图的创建，我们使用 ffmpeg.

For Video Thumbnail creation we use ffmpeg.

在Linux系统(centos 6.x)下Ffmpeg安装过程和Php例子:-

In Linux Systems(centos 6.x) Ffmpeg installation process and Php example:-

这个过程是在我的 centos 6 中完成的，并使用 php 创建了缩略图.

This process is done in my centos 6 and created thumbnails using php.

步骤 1:-请检查您的 linux 服务器中是否有任何现有的 ffmpeg 可用.如果可用，请删除该文件.

Step1:- Please check If any existing ffmpeg available or not in your linux server .If available please remove that files.

第 2 步:-对于新的 ffmpeg 安装，请点击此链接
http://root.uabid.com/compile-ffmpeg-on-centos-6-x/ .

Step2:- For New ffmpeg installation follow this link
http://root.uabid.com/compile-ffmpeg-on-centos-6-x/ .

Step3:- 安装完成后检查您的 ffmpeg 安装在哪里.

Step3:- After installation complete check whereis your ffmpeg installed.

命令:whereis ffmpeg

Command: whereis ffmpeg

在 linux 命令行中键入此命令并检查.例如，您的 ffmpeg 路径在 (/usr/local/bin/ffmpeg) 中.在您的代码中使用此路径.

type this command in linux command line and check.If for example your ffmpeg path in (/usr/local/bin/ffmpeg). Use this path in your code.

PHP 示例:-

<?php

    if($extension === 'mp4' OR $extension == 'MP4' )
    {
    $video = $timestamp.$imagename;
    $videoname=substr($imagename,0, -4).$timestamp;
    $image = "sites/default/files/content_images/{$videoname}-thumb.jpg";

    var_dump($video);

    $cmd = "/usr/local/bin/ffmpeg -i    /opt/lampp/htdocs/myproject/sites/default/files/content_videos/".$video." -ss   00:00:01.435 -f image2 -vframes 1       /opt/lampp/htdocs/myproject/sites/default/files/content_images/".$videoname."-  thumb.jpg";

    $cmdstr = $cmd;
    $locale = 'en_IN.UTF-8';
    setlocale(LC_ALL, $locale);
    putenv('LC_ALL='.$locale);
    echo exec($cmd);
?>

流程 2:-这是用于静态文件路径:

Process 2:- This is for static file paths:

<?php    
    $cmd = "/root/bin/ffmpeg -i /var/www/html/project/app/webroot/videos/example.mp4 -ss   00:00:01.435 -f image2 -vframes 1 /var/www/html/project/app/webroot/videothumbnails/example-thumb.jpg";
    $cmdstr = $cmd;
    $locale = 'en_IN.UTF-8';
    setlocale(LC_ALL, $locale);
    putenv('LC_ALL='.$locale);
    echo exec($cmd);
?>

希望这对你有帮助 &其他..

Hope this helps to you & others..

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