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 $int_value;
}
//獲得視頻的數(shù)字時間
function getFlvDuration($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 = $timest
}
fseek($fp, $next_offset, SEEK_SET);
}
fclose($fp);
return $duration;
}
//轉(zhuǎn)化為0:03:56的時間格式
function getFlvTime($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;
}
以上所述是小編給大家介紹的利用php獲得flv視頻長度的實例代碼,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持!