廢話不多說了,直接給大家貼代碼了,具體代碼如下所示:
- 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 $int_value;
- }
- //獲得視頻的數字時間
- function getFlvDuration($name){
- if(!file_exists($name)){
- return;
- }
- $flv_data_length=filesize($name);
- $fp = @fopen($name, 'r');
- $flv_header = fread($fp, 5);
- fseek($fp, 5, SEEK_SET);
- $frame_size_data_length = $this->BigEndian2Int(fread($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 = $this->BigEndian2Int(substr($this_tag_header, 5, 3));
- $timestamp = $this->BigEndian2Int(substr($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 $duration;
- }
- //轉化為0:03:56的時間格式
- function getFlvTime($time){
- $num = $time; //Vevb.com
- $sec = intval($num/1000);
- $h = intval($sec/3600);
- $m = intval(($sec%3600)/60);
- $s = intval(($sec%60));
- $tm = $h.':'.$m.':'.$s;
- return $tm;
- }
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