php获取flv视频时间长度代码
发布时间：2022-06-17 08:42:06 所属栏目：PHP教程 来源：互联网
导读：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) { $sign
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function bigendian2int($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 $int_value; } function gettime($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 > $flv_header_frame_length) { //开源代码phpfensi.com fseek($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); $data_length = bigendian2int(substr($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 （编辑：鹤壁站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
