php获取flv视频时间长度代码
发布:smiling 来源: PHP粉丝网 添加日期:2014-09-09 15:05:12 浏览: 评论:0
- 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 > $flv_header_frame_length) {
- //开源代码phpfensi.com
- fseek($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
Tags: php获取flv php视频时间长
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