用php将任何格式视频转为flv的代码

<? 
define("ROOT_DIR",dirname(__FILE__)); 
class EcodeFlv { 
var $fromFile; //上传来的文件 
var $toFilePath; //保存文件路径 
var $toPicPath; //保存图片路径 
var $mpeg; //ffmpeg.exe文件的路径 
var $mencode; //mencode.exe文件的路径 
var $cmdToFile; //转换文件命令 
var $cmdToPic; //转换图片命令 
var $toFileName; //转换后的文件名 
var $mpegComm; //ffmpeg.exe的转换命令 
var $mencodeComm; //mencode.exe的命令 
var $mpegType; 
var $mencodeType; 
var $midi; //mdi.exe的路径 
var $cmdMidi; //mdi.exe的命令 
//初始化类 
function EcodeFlv($fromFile,$toFilePath,$toPicPath,$mpeg,$mencode,$midi) { 
$this->mpegComm = false; 
$this->mencodeComm = false; 
$this->fromFile = $fromFile; 
$this->toFilePath = $toFilePath; 
$this->toPicPath = ROOT_DIR."/".$toPicPath; 
$this->mpeg = ROOT_DIR.$mpeg; 
$this->mencode = ROOT_DIR.$mencode; 
$this->midi = ROOT_DIR.$midi; 
$this->mpegType=array ( 
"audio/x-mpeg"=>".mp3", 
"video/mpeg"=>".mpeg", 
"video/3gpp"=>".3gp", 
"video/x-ms-asf"=>".asf", 
"video/x-msvideo"=>".avi" 
); 
$this->mencodeType = array( 
"application/vnd.rn-realmedia"=>".rm", 
"audio/x-pn-realaudio"=>".rmvb", 
"audio/x-ms-wmv"=>".wmv", 
); 
} 

//检查文件类型 

function checkType() { 
if(function_exists(mime_content_type)){ 
return false; 
}else{ 
//$contentType = mime_content_type($this->fromFile); 
$exe = "D:\server\php\extras\magic"; 
$handel = new finfo(FILEINFO_MIME, $exe); 
$contentType = $handel->file($this->fromFile); 
} 
foreach($this->mpegType as $index=>$key){ 
if($contentType == $index){ 
$name = md5(date("Ymd").tiime()); 
$this->toFileName = $name; 
$this->$mpegComm = true; 
return true; 
} 
} 
foreach($this->mencodeType as $index=>$key){ 
if($contentType == $index){ 
$name = md5(date("Ymd").time()); 
$this->toFileName = $name; 
$this->mencodeComm = true; 
return true; 
}else{ 
return false; 
} 
} 
} 

//设置文件，图片大小 
function setSize($flvSize,$picSize) { 
$flvWidth = $flvSize[0]; 
$flvHeight = $flvSize[1]; 
$picWidth = $picSize[0]; 
$picHeight = $picSize[1]; 
$picName = $this->toPicPath.$this->toFileName.".jpg"; 
$flvName = $this->toFilePath.$this->toFileName.".flv"; 
$toMdi = ROOT_DIR."/".$flvName; 
$size = $picWidth."x".$picHeight; 
if($this->mpegComm){ 
$this->cmdToFile= "$this->mpeg -i $this->fromFile -y -ab 56 -ar 22050 -b 500 -r 15 -s $flvWith*$flvHeight $flvName"; 
} 
elseif($this->mencodeComm){ 
$this->cmdToFile = "$this->mencode $this->fromFile -vf scale=$flvWidth:$flvHeight -ffourcc FLV1 -of lavf -ovc lavc -lavcopts vcodec=flv:vbitrate=70:acodec=mp3:abitrate=56:dia=-1 -ofps 25 -srate 22050 -oac mp3lame -o $flvName"; 
} 
$this->cmdToPic = "$this->mpeg -i $toMdi -y -f image2 -ss 8 -t 0.003 -s $size $picName"; 
$this->cmdMidi = "$this->midi $toMdi /k"; 
echo $this->cmdToPic; 
} 

//开始转换 
function toEcode() { 
set_time_limit(0); 
exec($this->cmdToFile,$flvStatus) 
exec($this->cmdToPic,$picStatus); 
exec($this->cmdMidi,$mStatus); 
} 

} 
?>