小编ret*_*ius的帖子

我该如何将视频.mpg转换为.mp4，而不用担心音质。我的代码如下：

 $INCPATH       = dirname(__FILE__).'/';

 $id = 99999;
 $ext = "MPG" ;

  $input_dir = $INCPATH."../img/videos/".$id.".".$ext ;   
  $output_dir2 = $INCPATH."../img/videos/".$id.".mp4" ;

    $q = '/usr/bin/ffmpeg -i '.$input_dir.' -c:v libx264 -c:a libfaac -r     30 '.$output_dir2." 2>&1" ;

    $out = shell_exec($q) ;
    $input_dir  = $output_dir2 ;

     echo var_dump($out);

回应：

            string(5735) "ffmpeg version N-76539-g480bad7-syslint Copyright (c) 2000-2015 the FFmpeg developers
              built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
              configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib …