利用php获得flv视频长度的实例代码

废话不多说了，直接给大家贴代码了，具体代码如下所示：functionBigEndian2Int($byte_word,$signed=f

废话不多说了，直接给大家贴代码了，具体代码如下所示：

 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 $int_value; 
} 
//获得视频的数字时间 
function getFlvDuration($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 $duration; 
} 
//转化为0：03：56的时间格式 
function getFlvTime($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; 
} 

总结

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php获得flv视频长度 php flv 视频长度