Kim Madsen a écrit :
Hey
Talawa wrote on 2009-10-19 18:29:
Hello everyone,
I post a message here because i didn't find any solution yet.
I just finished video streaming service on my website. I use xmoov
script (http://xmoov.com/xmoov-php/) to do that. It works like a
charm, but I find an issue. When the video is buffering into the flash
player, all others requests are pending until the video is loaded.
I discovered in my search that fopen() function could block php process.
Does someone know this problem ?
I've had a similar problem with zip downloads (which also use fopen), I
supect either the headers, a caching problem or latin1/utf-8
What does your headers look like? (firefox has a lovely plugin "live
http headers")
Which character encoding do you use?
Show us code bit from fopen to fclose
I forced charset encoding in my htaccess to ISO-8859-1.
Here's the http headers I receive :
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0, max-age=0
Pragma: no-cache
Last-Modified: Mon, 19 Oct 2009 19:00:33 GMT
X-Pad: avoid browser bug
Content-Length: 14145470
Vary: User-Agent
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: video/x-flv
And here's the php code :
if (($fh = fopen($file, 'rb')) === FALSE)
return;
# assemble packet interval
$packet_interval = 0.3;
# assemble packet size
$packet_size = STREAM_SPEED * 1042;
$seekPos = intval($seekPos);
$fileSize = filesize($file) - (($seekPos > 0) ? $seekPos + 1 : 0);
session_cache_limiter("nocache");
header("Cache-Control: private",false);
header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
header("Last-Modified: " . date("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate,
post-check=0, pre-check=0, max-age=0");
header("Pragma: no-cache");
header("Content-Type: video/x-flv");
header("X-Pad: avoid browser bug");
header("Content-Length: " . $fileSize);
# FLV file format header
if($seekPos != 0) {
print('FLV');
print(pack('C', 1));
print(pack('C', 1));
print(pack('N', 9));
print(pack('N', 9));
}
# seek to requested file position
fseek($fh, $seekPos);
# output file
while(!feof($fh)) {
# get start time
list($usec, $sec) = explode(' ', microtime());
$time_start = ((float)$usec + (float)$sec);
# output packet
print(fread($fh, $packet_size));
# get end time
list($usec, $sec) = explode(' ', microtime());
$time_stop = ((float)$usec + (float)$sec);
# wait if output is slower than $packet_interval
$time_difference = $time_stop - $time_start;
if($time_difference < (float)$packet_interval) {
usleep((float)$packet_interval * 1000000 -
(float)$time_difference * 1000000);
}
}
fclose($fh);
Thanks for help.
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