php获取flv视频时间

网络整理 - 08-26

  php获取flv时间!有源码!拿来就可以使用!超级简单。

<?php     function BigEndian2Int($byte_word, $signed = false) {     $int_value = 0;     $byte_wordlen = strlen($byte_word);     for ($i = 0; $i < $byte_wordlen; $i++)     {     $int_value += ord($byte_word{$i}) * pow(256, ($byte_wordlen - 1 - $i));     }     if ($signed)     {     $sign_mask_bit = 0x80 << (8 * ($byte_wordlen - 1));     if ($int_value & $sign_mask_bit)     {     $int_value = 0 - ($int_value & ($sign_mask_bit - 1));     }     }     return $int_value;     }     function getTime($name){     if(!file_exists($name)){     return;     }     $flv_data_length=filesize($name);     $fp = @fopen($name, 'rb');     $flv_header = fread($fp, 5);     fseek($fp, 5, SEEK_SET);     $frame_size_data_length =BigEndian2Int(fread($fp, 4));     $flv_header_frame_length = 9;     if ($frame_size_data_length > $flv_header_frame_length) {     fseek($fp, $frame_size_data_length - $flv_header_frame_length, SEEK_CUR);     }     $duration = 0;     while ((ftell($fp) + 1) < $flv_data_length) {     $this_tag_header = fread($fp, 16);     $data_length = BigEndian2Int(substr($this_tag_header, 5, 3));     $timestamp = BigEndian2Int(substr($this_tag_header, 8, 3));     $next_offset = ftell($fp) - 1 + $data_length;     if ($timestamp > $duration) {     $duration = $timestamp;     }     fseek($fp, $next_offset, SEEK_SET);     }     fclose($fp);     return $duration;     }     function fn($time){     $num = $time;     $sec = intval($num / 1000);     $h = intval($sec / 3600);     $m = intval(($sec % 3600) / 60);     $s = intval(($sec % 60 ));     $tm = $h . ':' . $m . ':' . $s ;     return $tm;     }     echo getTime("27729.flv");//显示数字时间如236722     echo fn(236722); //显示时间格式0:03:56     ?>