用php将任何格式视频转为flv的示例代码

<?
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:serverphpextrasmagic";
$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);
}

}
?>