[eluser]montassis[/eluser]
Hey thanks for the tips. I have looked into gearman and its definitely something I will probably implement down the track, at the moment I just want to get things working to make sure what I'm doing is feasible.
I tried to set it up to poll every few seconds using ajax but unfortunately the process still doesnt load in the background... so the view loads, the video starts getting converted but then waits until its finished and then the polling starts.
I'd rather avoid doing crons, ultimately i'd like a progress bar to show progress (which I can create using ffmpeg output). The videos arent very large and the max time allowable is 30 seconds (which i need to determine as the video is uploaded using ffmpeg, so crons probably arent going to cut it there either).
Here is my updated code. I have now set the PID to a hidden field, which is read by the doc ready function in the javascript (jquery plugin periodicalupdater) and polls the new method videoProgress(). As I said though, it wait until the ffmpeg has finished, and prints a whole bunch of dots.
Upload Controller
Code:
function uploadVideo() {
$config['upload_path'] = getcwd() . '/uservids/' . $this->session->userdata('accountid');
$config['allowed_types'] = 'mov|txt|pdf|doc|wmv|ogv';
$filename = md5(date(DATE_RFC822));
$config['file_name'] = $filename;
$this->load->library('upload', $config);
if (!$this->upload->do_upload('videoFile')) {
[removed]
} else {
$videoDetails = $this->upload->data();
$videoDetails['accountid'] = $this->session->userdata('accountid');
$videoid = $this->_createVideo($videoDetails);
$fullpath = $videoDetails['full_path'];
$filepath = $videoDetails['file_path'];
// conversion
$command = 'ffmpeg -i ' . $fullpath . ' ' . $filepath . $filename . '.ogv';
$pid = $this->_runInBackground($command);
// page data
$mainData['success'] = $this->upload->data();
$mainData['firstName'] = $this->session->userdata('firstName');
$mainData['lastName'] = $this->session->userdata('lastName');
// form data
$mainData['title'] = array('name' => 'title', 'id' => 'title');
$mainData['comment'] = array('name' => 'title', 'id' => 'title', 'rows' => '8', 'cols' => '37');
$mainData['hidden'] = array(
'videoid' => $videoid,
'pid' => $pid);
//load scripts
$data['scripts'] = array(
'/mogo/js/periodical/periodicalupdater.js',
'/mogo/js/upload_success.js');
// load the view
$data['mainView'] = 'upload/upload_success';
$data['mainData'] = $mainData;
$this->load->view('template', $data);
}
}
//inserts into database, returns id
function _createVideo($details) {
return $this->Video->createVideo($details);
}
// supposed to run a command in the background
function _runInBackground($command, $priority = 0) {
if ($priority)
$PID = shell_exec("nohup nice -n $priority $command 2> /dev/null & echo $! &");
else
$PID = shell_exec("nohup $command > /dev/null 2> /dev/null & echo $! &");
return($PID);
}
// checks if process is running
function _isProcessRunning($PID) {
exec("ps $PID", $ProcessState);
return(count($ProcessState) >= 2);
}
// used by jquery call to check progress
function videoProgress() {
$pid = $this->input->post('pid');
while ($this->_isProcessRunning($pid)) {
echo ' . ';
ob_flush();
flush();
// sleep for .25 seconds
usleep(250000);
}
}
Code:
$().ready(function() {
var pid = $('[name|="pid"]').val();
$.PeriodicalUpdater('videoProgress', {
method: 'post', // method; get or post
data: {pid: pid}, // array of values to be passed to the page - e.g. {name: "John", greeting: "hello"}
minTimeout: 250, // starting value for the timeout in milliseconds
maxTimeout: 2000, // maximum length of time between requests
multiplier: 2, // if set to 2, timerInterval will double each time the response hasn't changed (up to maxTimeout)
type: 'text', // response type - text, xml, json, etc. See $.ajax config options
maxCalls: 0, // maximum number of calls. 0 = no limit.
autoStop: 0 // automatically stop requests after this many returns of the same data. 0 = disabled.
}, function(data) {
$('#progress').append(data);
});
});
Any suggestions?
