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;
-
- } &nbs
|