作者:小流氓本尊_438 | 来源:互联网 | 2013-04-22 17:18
php获取flv时间!有源码!拿来就可以使用!超级简单。?phpfunctionBigEndian2Int($byte_word,$signed=false){$int_value=0;$byte_wordlen=strlen($byte_word);for($i=0;$i$b
php获取flv时间!有源码!拿来就可以使用!超级简单。
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- function BigEndian2Int($byte_word, $signed = false) {
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- $int_value = 0;
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- $byte_wordlen = strlen($byte_word);
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- for ($i = 0; $i < $byte_wordlen; $i++)
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- {
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- $int_value += ord($byte_word{$i}) * pow(256, ($byte_wordlen - 1 - $i));
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- }
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- if ($signed)
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- {
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- $sign_mask_bit = 0x80 << (8 * ($byte_wordlen - 1));
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- if ($int_value & $sign_mask_bit)
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- {
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- $int_value = 0 - ($int_value & ($sign_mask_bit - 1));
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- }
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- }
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- return $int_value;
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- }
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- function getTime($name){
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- if(!file_exists($name)){
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- return;
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- }
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- $flv_data_length=filesize($name);
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- $fp = @fopen($name, 'rb');
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- $flv_header = fread($fp, 5);
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- fseek($fp, 5, SEEK_SET);
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- $frame_size_data_length =BigEndian2Int(fread($fp, 4));
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- $flv_header_frame_length = 9;
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- if ($frame_size_data_length > $flv_header_frame_length) {
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- fseek($fp, $frame_size_data_length - $flv_header_frame_length, SEEK_CUR);
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- }
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- $duration = 0;
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- while ((ftell($fp) + 1) < $flv_data_length) {
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- $this_tag_header = fread($fp, 16);
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- $data_length = BigEndian2Int(substr($this_tag_header, 5, 3));
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- $timestamp = BigEndian2Int(substr($this_tag_header, 8, 3));
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- $next_offset = ftell($fp) - 1 + $data_length;
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- if ($timestamp > $duration) {
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- $duration = $timestamp;
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- }
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- fseek($fp, $next_offset, SEEK_SET);
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- }
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- fclose($fp);
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- return $duration;
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- }
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- function fn($time){
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- $num = $time;
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- $sec = intval($num / 1000);
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- $h = intval($sec / 3600);
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- $m = intval(($sec % 3600) / 60);
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- $s = intval(($sec % 60 ));
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- $tm = $h . ':' . $m . ':' . $s ;
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- return $tm;
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- }
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- echo getTime("27729.flv");
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- echo fn(236722);
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- ?>