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php获取flv视频时间长度代码_PHP教程

程序员文章站 2024-01-11 18:04:46
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php教程获取flv视频时间长度代码
  

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


www.bkjia.comtruehttp://www.bkjia.com/PHPjc/444906.htmlTechArticlephp教程获取flv视频时间长度代码 function bigendian2int($byte_word, $signed = false) { $int_value = 0; $byte_wordlen = strlen($byte_word); for ($i = 0; $i $byte_wordlen;...