rush: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 $int_value;
}
//获得视频的数字时间
function getFlvDuration($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,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
以上所述是小编给大家介绍的利用PHP获得flv视频长度的实例代码，希望对大家有所帮助。程序员遇到问题都会上（编程之家jb51.cc）查找问题解答方法！如果觉得站点还不错，随手转发给程序员朋友一下！
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