Home > Backend Development > PHP Tutorial > php flv视频时间获取函数_php技巧

php flv视频时间获取函数_php技巧

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Release: 2016-05-17 09:24:44
Original
1135 people have browsed it
复制代码 代码如下:

  function BigEndian2Int($byte_word, $signed = false) {
  $int_value = 0;
  $byte_wordlen = strlen($byte_word);
  for ($i = 0; $i   {
  $int_value += ord($byte_word{$i}) * pow(256, ($byte_wordlen - 1 - $i));
  }
  if ($signed)
  {
  $sign_mask_bit = 0x80   if ($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)   $this_tag_header = fread($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
  ?>
Related labels:
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Issues
php data acquisition?
From 1970-01-01 08:00:00
0
0
0
PHP extension intl
From 1970-01-01 08:00:00
0
0
0
How to learn php well
From 1970-01-01 08:00:00
0
0
0
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template