PHP-如何抓取视频网站的视频截图？

Question

比如我知道一个youku的视频地址，根据这个地址抓取对应视频的一帧关键画面的截图，如何来做？

Answer 1

试试这个吧，其实都是根据正则从页面源文件上去匹配相应的标签，如果你想从视频里截取，那么在客户端来设计，应该难度很大，很难实现吧。

<?php
$link = 'http://v.youku.com/v_show/id_XNDQzMzU3NDMy.html';
$host = 'youku.com';

$result = getVideoInfo($link, $host);
print_r($result);

function getVideoInfo($link, $host) {
$return = array();
if('youku.com' == $host) {
//分析视频网址，获取视频编码号
preg_match_all("/id_(w+)[=|.html]/", $link, $matches);
if(!empty($matches[1][0])) {
$return['flashvar'] = $matches[1][0];
}
//获取视频页面内容，存与$text中
$text=file_get_contents($link);
//获取视频标题
preg_match("/<title>(.*?) - (.*)</title>/", $text, $title);
var_dump($title);
preg_match_all("/<li class="download"(.*)</li>/",$text,$match2);
preg_match("/http://vimg(.*)|">/",$match2[1][0],$imageurl);
if (!empty($imageurl[1])) {
$return['imageurl'] = 'http://vimg'.$imageurl[1];
}
if (!empty($title)) {
$return['title'] = $title[1];
}
} elseif('ku6.com' == $host) {
// http://v.ku6.com/show/bjbJKPEex097wVtC.html
// http://v.ku6.com/special/index_3628020.html
//对于酷6网，末尾以index_开头的地址需要另外分析其视频编码
$text=file_get_contents($link);
preg_match_all("//([w-]+).html/", $link, $matches);
if(1 > preg_match("//index_([w-]+).html/", $link) && !empty($matches[1][0])) {
$return['flashvar'] = $matches[1][0];
}else{
preg_match_all("/refer/(.*)/v.swf/",$text,$videourl);
$return['flashvar'] = $videourl[1][0];
}
preg_match("/<title>(.*?) - (.*)</title>/", $text, $title);
//经分析，酷六的视频截图地址在视频页面的<span class="s_pic“></span>标签之间
preg_match_all("/<span class="s_pic">(.*)</span>/",$text,$imageurl);
if (!empty($imageurl[1][0])) {
$return['imageurl'] = $imageurl[1][0];
}
if (!empty($title)) {
$return['title'] = $title[1];
}
}elseif ('tudou.com' == $host){
//http://www.tudou.com/programs/view/_ke1lzCnBYw/
$tudou = file_get_contents($link);
preg_match_all("/view/([w-]+)//", $link, $matches);
if(!empty($matches[1][0])) {
$return['flashvar'] = $matches[1][0];
}
preg_match("/<title>(.*?) - (.*)</title>/", $tudou, $title);
preg_match_all("/<span class="s_pic">(.*)</span>/",$tudou,$imageurl);
if (!empty($imageurl[1][0])) {
$return['imageurl'] = $imageurl[1][0];
}
if (!empty($title)) {
$return['title'] = $title[1];
}
}
return $return;
}

Answer 2

之前用到的一个主流视频网站地址解析类，很方便，供参考。

<?php
class VideoUrlParser
{
const USER_AGENT = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko)
Chrome/8.0.552.224 Safari/534.10";
const CHECK_URL_VALID = "/(youku.com|tudou.com|ku6.com|56.com|letv.com|video.sina.com.cn|(my.)?tv.sohu.com|v.qq.com)/";

/**
* parse
*
* @param string $url
* @param mixed $createObject
* @static
* @access public
* @return void
*/
static public function parse($url='', $createObject=true){
$lowerurl = strtolower($url);
preg_match(self::CHECK_URL_VALID, $lowerurl, $matches);
if(!$matches) return false;

switch($matches[1]){
case 'youku.com':
$data = self::_parseYouku($url);
break;
case 'tudou.com':
$data = self::_parseTudou($url);
break;
case 'ku6.com':
$data = self::_parseKu6($url);
break;
case '56.com':
$data = self::_parse56($url);
break;
case 'letv.com':
$data = self::_parseLetv($url);
break;
case 'video.sina.com.cn':
$data = self::_parseSina($url);
break;
case 'my.tv.sohu.com':
case 'tv.sohu.com':
case 'sohu.com':
$data = self::_parseSohu($url);
break;
case 'v.qq.com':
$data = self::_parseQq($url);
break;
default:
$data = false;
}

if($data && $createObject) $data['object'] = "<embed src="{$data['swf']}" quality="high" width="480" height="400" align="middle" allowNetworking="all" allowScriptAccess="always" type="application/x-shockwave-flash"></embed>";
return $data;
}
/**
* 腾讯视频
* http://v.qq.com/cover/o/o9tab7nuu0q3esh.html?vid=97abu74o4w3_0
* http://v.qq.com/play/97abu74o4w3.html
* http://v.qq.com/cover/d/dtdqyd8g7xvoj0o.html
* http://v.qq.com/cover/d/dtdqyd8g7xvoj0o/9SfqULsrtSb.html
* http://imgcache.qq.com/tencentvideo_v1/player/TencentPlayer.swf?_v=20110829&vid=97abu74o4w3&autoplay=1&list=2&showcfg=1&tpid=23&title=%E7%AC%AC%E4%B8%80%E7%8E%B0%E5%9C%BA&adplay=1&cid=o9tab7nuu0q3esh
*/
private function _parseQq($url){
if(preg_match("//play//", $url)){
$html = self::_fget($url);
preg_match("/url=[^"]+/", $html, $matches);
if(!$matches); return false;
$url = $matches[0];
}
preg_match("/vid=([^_]+)/", $url, $matches);
$vid = $matches[1];
$html = self::_fget($url);
// query
preg_match("/flashvarss=s"([^;]+)/s", $html, $matches);
$query = $matches[1];
if(!$vid){
preg_match("/vids?=s?vids?||s?"(w+)";/i", $html, $matches);
$vid = $matches[1];
}
$query = str_replace('"+vid+"', $vid, $query);
parse_str($query, $output);
$data['img'] = "http://vpic.video.qq.com/{$$output['cid']}/{$vid}_1.jpg";
$data['url'] = $url;
$data['title'] = $output['title'];
$data['swf'] = "http://imgcache.qq.com/tencentvideo_v1/player/TencentPlayer.swf?".$query;
return $data;
}

/**
* 优酷网
* http://v.youku.com/v_show/id_XMjI4MDM4NDc2.html
* http://player.youku.com/player.php/sid/XMjU0NjI2Njg4/v.swf
*/
private function _parseYouku($url){
preg_match("#id_(w+)#", $url, $matches);

if (empty($matches)){
preg_match("#v_playlist/#", $url, $mat);
if(!$mat) return false;

$html = self::_fget($url);

preg_match("#videoId2s*=s*'(w+)'#", $html, $matches);
if(!$matches) return false;
}

$link = "http://v.youku.com/player/getPlayList/VideoIDS/{$matches[1]}/timezone/+08/version/5/source/out?password=&ran=2513&n=3";

$retval = self::_cget($link);
if ($retval) {
$json = json_decode($retval, true);

$data['img'] = $json['data'][0]['logo'];
$data['title'] = $json['data'][0]['title'];
$data['url'] = $url;
$data['swf'] = "http://player.youku.com/player.php/sid/{$matches[1]}/v.swf";

return $data;
} else {
return false;
}
}

/**
* 土豆网
* http://www.tudou.com/programs/view/Wtt3FjiDxEE/
* http://www.tudou.com/v/Wtt3FjiDxEE/v.swf
*
* http://www.tudou.com/playlist/p/a65718.html?iid=74909603
* http://www.tudou.com/l/G5BzgI4lAb8/&iid=74909603/v.swf
*/
private function _parseTudou($url){
preg_match("#view/([-w]+)/#", $url, $matches);

if (empty($matches)) {
if (strpos($url, "/playlist/") == false) return false;

if(strpos($url, 'iid=') !== false){
$quarr = explode("iid=", $lowerurl);
if (empty($quarr[1])) return false;
}elseif(preg_match("#p/l(d+).#", $lowerurl, $quarr)){
if (empty($quarr[1])) return false;
}

$html = self::_fget($url);
$html = iconv("GB2312", "UTF-8", $html);

preg_match("/lid_codes=slcodes=s['"]([^'"]+)/s", $html, $matches);
$icode = $matches[1];

preg_match("/iids=s.*?||s(d+)/sx", $html, $matches);
$iid = $matches[1];

preg_match("/listDatas=s([{.*}])/sx", $html, $matches);

$find = array("/n/", '/s/', "/:[^d"]w+[^,]*,/i", "/({|,)(w+):/");
$replace = array("", "", ':"",', '\1"\2":');
$str = preg_replace($find, $replace, $matches[1]);
//var_dump($str);
$json = json_decode($str);
//var_dump($json);exit;
if(is_array($json) || is_object($json) && !empty($json)){
foreach ($json as $val) {
if ($val->iid == $iid) {
break;
}
}
}

$data['img'] = $val->pic;
$data['title'] = $val->title;
$data['url'] = $url;
$data['swf'] = "http://www.tudou.com/l/{$icode}/&iid={$iid}/v.swf";

return $data;
}

$host = "www.tudou.com";
$path = "/v/{$matches[1]}/v.swf";

$ret = self::_fsget($path, $host);

if (preg_match("#nLocation: (.*)n#", $ret, $mat)) {
parse_str(parse_url(urldecode($mat[1]), PHP_URL_QUERY));

$data['img'] = $snap_pic;
$data['title'] = $title;
$data['url'] = $url;
$data['swf'] = "http://www.tudou.com/v/{$matches[1]}/v.swf";

return $data;
}
return false;
}

/**
* 酷6网
* http://v.ku6.com/film/show_520/3X93vo4tIS7uotHg.html
* http://v.ku6.com/special/show_4926690/Klze2mhMeSK6g05X.html
* http://v.ku6.com/show/7US-kDXjyKyIInDevhpwHg...html
* http://player.ku6.com/refer/3X93vo4tIS7uotHg/v.swf
*/
private function _parseKu6($url){
if(preg_match("/show_/", $url)){
preg_match("#/([-w]+).html#", $url, $matches);
$url = "http://v.ku6.com/fetchVideo4Player/{$matches[1]}.html";
$html = self::_fget($url);

if ($html) {
$json = json_decode($html, true);
if(!$json) return false;

$data['img'] = $json['data']['picpath'];
$data['title'] = $json['data']['t'];
$data['url'] = $url;
$data['swf'] = "http://player.ku6.com/refer/{$matches[1]}/v.swf";

return $data;
} else {
return false;
}
}elseif(preg_match("/show//", $url, $matches)){
$html = self::_fget($url);
preg_match("/ObjectInfos?=s?([^n]*)};/si", $html, $matches);
$str = $matches[1];
// img
preg_match("/covers?:s?"([^"]+)"/", $str, $matches);
$data['img'] = $matches[1];
// title
preg_match("/title"?s?:s?"([^"]+)"/", $str, $matches);
$jsstr = "{"title":"{$matches[1]}"}";
$json = json_decode($jsstr, true);
$data['title'] = $json['title'];
// url
$data['url'] = $url;
// query
preg_match("/"(vid=[^"]+)"sname="flashVars"/s", $html, $matches);
$query = str_replace("&", '&', $matches[1]);
preg_match("///player.ku6cdn.com[^"']+/", $html, $matches);
$data['swf'] = 'http:'.$matches[0].'?'.$query;

return $data;
}
}

/**
* 56网
* http://www.56.com/u73/v_NTkzMDcwNDY.html
* http://player.56.com/v_NTkzMDcwNDY.swf
*/
private function _parse56($url){
preg_match("#/v_(w+).html#", $url, $matches);

if (empty($matches)) return false;

$link="http://vxml.56.com/json/{$matches[1]}/?src=out";
$retval = self::_cget($link);

if ($retval) {
$json = json_decode($retval, true);

$data['img'] = $json['info']['img'];
$data['title'] = $json['info']['Subject'];
$data['url'] = $url;
$data['swf'] = "http://player.56.com/v_{$matches[1]}.swf";

return $data;
} else {
return false;
}
}

/**
* 乐视网
* http://www.letv.com/ptv/vplay/1168109.html
* http://www.letv.com/player/x1168109.swf
*/
private function _parseLetv($url){
$html = self::_fget($url);
preg_match("#http://v.t.sina.com.cn/([^'"]*)#", $html, $matches);
parse_str(parse_url(urldecode($matches[0]), PHP_URL_QUERY));
preg_match("#vplay/(d+)#", $url, $matches);
$data['img'] = $pic;
$data['title'] = $title;
$data['url'] = $url;
$data['swf'] = "http://www.letv.com/player/x{$matches[1]}.swf";

return $data;
}

// 搜狐TV http://my.tv.sohu.com/u/vw/5101536
private function _parseSohu($url){
$html = self::_fget($url);
$html = iconv("GB2312", "UTF-8", $html);
preg_match_all("/og:(?:title|image|videosrc)"scontent="([^"]+)"/s", $html, $matches);
$data['img'] = $matches[1][1];
$data['title'] = $matches[1][0];
$data['url'] = $url;
$data['swf'] = $matches[1][2];
return $data;
}

/*
* 新浪播客
* http://video.sina.com.cn/v/b/48717043-1290055681.html
* http://you.video.sina.com.cn/api/sinawebApi/outplayrefer.php/vid=48717043_1290055681_PUzkSndrDzXK+l1lHz2stqkP7KQNt6nki2O0u1ehIwZYQ0/XM5GdatoG5ynSA9kEqDhAQJA4dPkm0x4/s.swf
*/
private function _parseSina($url){
preg_match("/(d+)(?:-|_)(d+)/", $url, $matches);
$url = "http://video.sina.com.cn/v/b/{$matches[1]}-{$matches[2]}.html";
$html = self::_fget($url);
preg_match("/videos?:s?([^<]+)}/", $html, $matches);
$find = array("/n/", "/s*/", "/'/", "/{([^:,]+):/", "/,([^:]+):/", "/:[^d"]w+[^,]*,/i");
$replace = array('', '', '"', '{"\1":', ',"\1":', ':"",');
$str = preg_replace($find, $replace, $matches[1]);
$arr = json_decode($str, true);

$data['img'] = $arr['pic'];
$data['title'] = $arr['title'];
$data['url'] = $url;
$data['swf'] = $arr['swfOutsideUrl'];

return $data;
}

/*
* 通过 file_get_contents 获取内容
*/
private function _fget($url=''){
if(!$url) return false;
$html = file_get_contents($url);
// 判断是否gzip压缩
if($dehtml = self::_gzdecode($html))
return $dehtml;
else
return $html;
}

/*
* 通过 fsockopen 获取内容
*/
private function _fsget($path='/', $host='', $user_agent=''){
if(!$path || !$host) return false;
$user_agent = $user_agent ? $user_agent : self::USER_AGENT;

$out = <<<HEADER
GET $path HTTP/1.1
Host: $host
User-Agent: $user_agent
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.5
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7rnrn
HEADER;
$fp = @fsockopen($host, 80, $errno, $errstr, 10);
if (!$fp) return false;
if(!fputs($fp, $out)) return false;
while ( !feof($fp) ) {
$html .= fgets($fp, 1024);
}
fclose($fp);
// 判断是否gzip压缩
if($dehtml = self::_gzdecode($html))
return $dehtml;
else
return $html;
}

/*
* 通过 curl 获取内容
*/
private function _cget($url='', $user_agent=''){
if(!$url) return;

$user_agent = $user_agent ? $user_agent : self::USER_AGENT;

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
if(strlen($user_agent)) curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);

ob_start();
curl_exec($ch);
$html = ob_get_contents();
ob_end_clean();

if(curl_errno($ch)){
curl_close($ch);
return false;
}
curl_close($ch);
if(!is_string($html) || !strlen($html)){
return false;
}
return $html;
// 判断是否gzip压缩
if($dehtml = self::_gzdecode($html))
return $dehtml;
else
return $html;
}

private function _gzdecode($data) {
$len = strlen ( $data );
if ($len < 18 || strcmp ( substr ( $data, 0, 2 ), "x1fx8b" )) {
return null; // Not GZIP format (See RFC 1952)
}
$method = ord ( substr ( $data, 2, 1 ) ); // Compression method
$flags = ord ( substr ( $data, 3, 1 ) ); // Flags
if ($flags & 31 != $flags) {
// Reserved bits are set -- NOT ALLOWED by RFC 1952
return null;
}
// NOTE: $mtime may be negative (PHP integer limitations)
$mtime = unpack ( "V", substr ( $data, 4, 4 ) );
$mtime = $mtime [1];
$xfl = substr ( $data, 8, 1 );
$os = substr ( $data, 8, 1 );
$headerlen = 10;
$extralen = 0;
$extra = "";
if ($flags & 4) {
// 2-byte length prefixed EXTRA data in header
if ($len - $headerlen - 2 < 8) {
return false; // Invalid format
}
$extralen = unpack ( "v", substr ( $data, 8, 2 ) );
$extralen = $extralen [1];
if ($len - $headerlen - 2 - $extralen < 8) {
return false; // Invalid format
}
$extra = substr ( $data, 10, $extralen );
$headerlen += 2 + $extralen;
}

$filenamelen = 0;
$filename = "";
if ($flags & 8) {
// C-style string file NAME data in header
if ($len - $headerlen - 1 < 8) {
return false; // Invalid format
}
$filenamelen = strpos ( substr ( $data, 8 + $extralen ), chr ( 0 ) );
if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) {
return false; // Invalid format
}
$filename = substr ( $data, $headerlen, $filenamelen );
$headerlen += $filenamelen + 1;
}

$commentlen = 0;
$comment = "";
if ($flags & 16) {
// C-style string COMMENT data in header
if ($len - $headerlen - 1 < 8) {
return false; // Invalid format
}
$commentlen = strpos ( substr ( $data, 8 + $extralen + $filenamelen ), chr ( 0 ) );
if ($commentlen === false || $len - $headerlen - $commentlen - 1 < 8) {
return false; // Invalid header format
}
$comment = substr ( $data, $headerlen, $commentlen );
$headerlen += $commentlen + 1;
}

$headercrc = "";
if ($flags & 1) {
// 2-bytes (lowest order) of CRC32 on header present
if ($len - $headerlen - 2 < 8) {
return false; // Invalid format
}
$calccrc = crc32 ( substr ( $data, 0, $headerlen ) ) & 0xffff;
$headercrc = unpack ( "v", substr ( $data, $headerlen, 2 ) );
$headercrc = $headercrc [1];
if ($headercrc != $calccrc) {
return false; // Bad header CRC
}
$headerlen += 2;
}

// GZIP FOOTER - These be negative due to PHP's limitations
$datacrc = unpack ( "V", substr ( $data, - 8, 4 ) );
$datacrc = $datacrc [1];
$isize = unpack ( "V", substr ( $data, - 4 ) );
$isize = $isize [1];

// Perform the decompression:
$bodylen = $len - $headerlen - 8;
if ($bodylen < 1) {
// This should never happen - IMPLEMENTATION BUG!
return null;
}
$body = substr ( $data, $headerlen, $bodylen );
$data = "";
if ($bodylen > 0) {
switch ($method) {
case 8 :
// Currently the only supported compression method:
$data = gzinflate ( $body );
break;
default :
// Unknown compression method
return false;
}
} else {
//...
}

if ($isize != strlen ( $data ) || crc32 ( $data ) != $datacrc) {
// Bad format! Length or CRC doesn't match!
return false;
}
return $data;
}
}