FFMPEG在命令行中运行但不在PHP中运行

Question

我正在使用ffmpeg build for windows来制作视频缩略图.该命令在命令行中运行良好,但不适用于PHP exec方法.我正在使用PHP 5.2.11

这是命令.

"E:/Documents and Settings/x/WINDOWS/ffmpeg" -itsoffset -4 -v "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/videogal/c08c3d20eeb9083ed033577bd154cba6.flv" -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/gallery/8ff43b72b932d2a34e7a6733672ad4d6.jpg" 2>&1

有人可以帮忙.我检查了他们看起来很好的权限.GD已安装.

错误消息是 'E:/Documents' is not recognized as an internal or external command, operable program or batch file

我在路径中使用正斜杠,除非转义双引号

PHP函数

function ExtractThumb($in, $out)
{$path=dbconf::FFMPEG_PATH;
    $thumb_stdout;
    $errors;
    $retval = 0;
 echo $in;
    // Delete the file if it already exists
    if (file_exists($out)) { unlink($out); }

    // Use ffmpeg to generate a thumbnail from the movie
    $cmd = "$path -itsoffset -4 -i $in -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 $out 2>&1";
   echo $cmd;

   exec($cmd, $thumb_stdout, $retval);

    // Queue up the error for processing
    if ($retval != 0) { $errors[] = "FFMPEG thumbnail generation failed"; }

    if (!empty($thumb_stdout))
    {
        foreach ($thumb_stdout as $line)
        {
            echo $line . "\n";
        }
    }

    if (!empty($errors))
    {
        foreach ($errors as $error)
        {
            echo $error . "\n";
        }
    }
}

有趣的是,如果我没有$ in和$ out绝对路径,这就是我得到的

Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --extra-cflags=-fno-common --enable-memalign-hack --enable-pthreads --enable-libmp3lame --enable-libxvid --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libfaac --enable-libgsm --enable-libx264 --enable-libschroedinger --enable-avisynth --enable-swscale --enable-gpl libavutil 49.12. 0 / 49.12. 0 libavcodec 52.10. 0 / 52.10. 0 libavformat 52.23. 1 / 52.23. 1 libavdevice 52. 1. 0 / 52. 1. 0 libswscale 0. 6. 1 / 0. 6. 1 built on Jan 13 2009 02:57:09, gcc: 4.2.4 822ae86a93810dade2843e822390d723.flv: no such file or directory

Answer 1

你是否正确地转义了反斜杠、引号等？有错误信息吗？