static function getPreviewFileStream($id)
{
$file = Files::find()->getById($id);
if ($file->isNewRecord()) {
return;
}
$fileName = rtrim($file->path, '/\\') . DS . $file->name . '.' . $file->ext;
if ($file->type == 1 || $file->type == 2) {
$fileNamePreview = rtrim($file->path, '/\\') . DS . $file->name . '-preview.flv';
$lock = $fileNamePreview . '.lock';
while (true) {
if (!file_exists($lock)) {
break;
}
}
if (!file_exists($fileNamePreview) || !@filesize($fileNamePreview)) {
$lock = $fileNamePreview . '.lock';
if (!file_exists($lock)) {
@ignore_user_abort(1);
@set_time_limit(0);
@touch($lock);
$ffmpegPath = Q::ini('appini/catalog/ffmpegPath');
$ffmpegParameter = Q::ini('appini/catalog/ffmpegParameter');
//$command = "$ffmpegPath -i \"$fileName\" -y -ab 56 -ar 22050 -r 15 -b 500 -s 320x240 \"$fileNamePreview\"";
//$command = "$ffmpegPath -i \"$fileName\" -y -ab 56 -ar 22050 -r 15 -s 320x240 \"$fileNamePreview\"";
$command = "{$ffmpegPath} -i \"{$fileName}\" {$ffmpegParameter} \"{$fileNamePreview}\"";
//$command .= "&& $ffmpegPath -i \"$fileName\" -y -f image2 -ss 8 -t 0.011 -s 320x240 \"$fileNamePreview.jpg\"";
@exec($command);
@unlink($lock);
}
}
$output = new QView_Output($file->title . '.' . $file->ext, 'video/x-flv');
$output->addFile($fileNamePreview);
return $output;
} else {
if ($file->type == 4) {
if ($file->ext == 'txt') {
$handle = @fopen($fileName, 'r');
$data = @fread($handle, @filesize($fileName));
@fclose($handle);
return Helper_Util::encoding($data, 'utf-8');
} else {
return '无法预览非文本文件（*.txt）格式';
}
} else {
$output = new QView_Output($file->title);
$output->addFile($fileName);
if ($file->ext == 'jpg' || $file->ext == 'jpeg') {
$output->setMimeType('image/jpeg');
}
return $output;
}
}
}
