php 使用 ffmpeg 转换视频,截图,并生成缩略图
http://blog.csdn.net/toss156/article/details/7003059
把ffmpeg 和 生成缩略图整合了一下。
把ffmpeg 和 生成缩略图整合了一下。
- include("ImageResize.class.php")
- //转视频
- $cmd="ffmpeg.exe -i starwar.avi -ab 56 -ar 22050 -b 500 -r 15 -s 320x240 1.flv";
- exec($cmd);
- //视频截图
- $cmd="ffmpeg.exe -i starwar.avi -f image2 -ss 10 -s 400*300 -vframes 1 1.jpg";
- exec($cmd);
- //生成缩略图
- $thumbnail = new ImageResize();
- $thumbnail->resizeimage("1.jpg", 30,30, 0, "small1.jpg");
- class ImageResize {
- //图片类型
- var $type;
- //实际宽度
- var $width;
- //实际高度
- var $height;
- //改变后的宽度
- var $resize_width;
- //改变后的高度
- var $resize_height;
- //是否裁图
- var $cut;
- //源图象
- var $srcimg;
- //目标图象地址
- var $dstimg;
- //临时创建的图象
- var $im;
- function resizeimage($img, $wid, $hei,$c,$dstpath) {
- $this->srcimg = $img;
- $this->resize_width = $wid;
- $this->resize_height = $hei;
- $this->cut = $c;
- //图片的类型
- $this->type = strtolower(substr(strrchr($this->srcimg,"."),1));
- //初始化图象
- $this->initi_img();
- //目标图象地址
- $this -> dst_img($dstpath);
- //--
- $this->width = imagesx($this->im);
- $this->height = imagesy($this->im);
- //生成图象
- $this->newimg();
- ImageDestroy ($this->im);
- }
- function newimg() {
- //改变后的图象的比例
- $resize_ratio = ($this->resize_width)/($this->resize_height);
- //实际图象的比例
- $ratio = ($this->width)/($this->height);
- if(($this->cut)=="1") {
- //裁图 高度优先
- if($ratio>=$resize_ratio){
- $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
- imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);
- ImageJpeg ($newimg,$this->dstimg);
- }
- //裁图 宽度优先
- if($ratio<</span>$resize_ratio) {
- $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
- imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));
- ImageJpeg ($newimg,$this->dstimg);
- }
- } else {
- //不裁图
- if($ratio>=$resize_ratio) {
- $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);
- imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);
- ImageJpeg ($newimg,$this->dstimg);
- }
- if($ratio<</span>$resize_ratio) {
- $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);
- imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);
- ImageJpeg ($newimg,$this->dstimg);
- }
- }
- }
- //初始化图象
- function initi_img() {
- if($this->type=="jpg") {
- $this->im = imagecreatefromjpeg($this->srcimg);
- }
- if($this->type=="gif") {
- $this->im = imagecreatefromgif($this->srcimg);
- }
- if($this->type=="png") {
- $this->im = imagecreatefrompng($this->srcimg);
- }
- if($this->type=="bmp") {
- $this->im = $this->imagecreatefrombmp($this->srcimg);
- }
- }
- //图象目标地址
- function dst_img($dstpath) {
- $full_length = strlen($this->srcimg);
- $type_length = strlen($this->type);
- $name_length = $full_length-$type_length;
- $name = substr($this->srcimg,0,$name_length-1);
- $this->dstimg = $dstpath;
- //echo $this->dstimg;
- }
- function ConvertBMP2GD($src, $dest = false) {
- if(!($src_f = fopen($src, "rb"))) {
- return false;
- }
- if(!($dest_f = fopen($dest, "wb"))) {
- return false;
- }
- $header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,14));
- $info = unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant", fread($src_f, 40));
- extract($info);
- extract($header);
- if($type != 0x4D42) { // signature "BM"
- return false;
- }
- $palette_size = $offset - 54;
- $ncolor = $palette_size / 4;
- $gd_header = "";
- // true-color vs. palette
- $gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
- $gd_header .= pack("n2", $width, $height);
- $gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
- if($palette_size) {
- $gd_header .= pack("n", $ncolor);
- }
- // no transparency
- $gd_header .= "\xFF\xFF\xFF\xFF";
- fwrite($dest_f, $gd_header);
- if($palette_size) {
- $palette = fread($src_f, $palette_size);
- $gd_palette = "";
- $j = 0;
- while($j < $palette_size) {
- $b = $palette{$j++};
- $g = $palette{$j++};
- $r = $palette{$j++};
- $a = $palette{$j++};
- $gd_palette .= "$r$g$b$a";
- }
- $gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
- fwrite($dest_f, $gd_palette);
- }
- $scan_line_size = (($bits * $width) + 7) >> 3;
- $scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
- 0x03) : 0;
- for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
- // BMP stores scan lines starting from bottom
- fseek($src_f, $offset + (($scan_line_size + $scan_line_align) * $l));
- $scan_line = fread($src_f, $scan_line_size);
- if($bits == 24) {
- $gd_scan_line = "";
- $j = 0;
- while($j < $scan_line_size) {
- $b = $scan_line{$j++};
- $g = $scan_line{$j++};
- $r = $scan_line{$j++};
- $gd_scan_line .= "\x00$r$g$b";
- }
- }
- else if($bits == 8) {
- $gd_scan_line = $scan_line;
- }
- else if($bits == 4) {
- $gd_scan_line = "";
- $j = 0;
- while($j < $scan_line_size) {
- $byte = ord($scan_line{$j++});
- $p1 = chr($byte >> 4);
- $p2 = chr($byte & 0x0F);
- $gd_scan_line .= "$p1$p2";
- }
- $gd_scan_line = substr($gd_scan_line, 0, $width);
- }
- else if($bits == 1) {
- $gd_scan_line = "";
- $j = 0;
- while($j < $scan_line_size) {
- $byte = ord($scan_line{$j++});
- $p1 = chr((int) (($byte & 0x80) != 0));
- $p2 = chr((int) (($byte & 0x40) != 0));
- $p3 = chr((int) (($byte & 0x20) != 0));
- $p4 = chr((int) (($byte & 0x10) != 0));
- $p5 = chr((int) (($byte & 0x08) != 0));
- $p6 = chr((int) (($byte & 0x04) != 0));
- $p7 = chr((int) (($byte & 0x02) != 0));
- $p8 = chr((int) (($byte & 0x01) != 0));
- $gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
- }
- $gd_scan_line = substr($gd_scan_line, 0, $width);
- }
- fwrite($dest_f, $gd_scan_line);
- }
- fclose($src_f);
- fclose($dest_f);
- return true;
- }
- function imagecreatefrombmp($filename) {
- $tmp_name = tempnam("/tmp", "GD");
- if($this->ConvertBMP2GD($filename, $tmp_name)) {
- $img = imagecreatefromgd($tmp_name);
- unlink($tmp_name);
- return $img;
- }
- return false;
- }
- }
源代码下载链接:
http://download.csdn.net/detail/toss156/3830291赞赏码
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