VideoJS Flash版本没有'；t播放文件(PHP Passthrough Stream）

我正在使用最新版本的VideoJS，并以以下方式将我的视频通过PHP：

调用类似：$this->streaming->handleDownload($videoPath, "video/mp4");

功能定义如下：

public function handleDownload($file, $mime = "") {
     if (is_file($file)) {
        header("Content-Type: $mime");
        if (isset($_SERVER['HTTP_RANGE']))  { // do it for any device that supports byte-ranges not only iPhone
            header("X-Info: Starting Ranged Download of $file");
            $this->rangeDownload($file);
        } else {
            header("Content-Length: ".filesize($file));
            header("X-Info: Starting Straight Download of $file");
            readfile($file);
        }
    } else {
        header("HTTP/1.1 500 Internal Server Error");
        $msg = "The requested path was no file!";
    }
}

rangeDownload（）定义为：

private function rangeDownload($file) {
    ob_end_clean();
    $fp = @fopen($file, 'rb');
    $size   = filesize($file); // File size
    $length = $size;           // Content length
    $start  = 0;               // Start byte
    $end    = $size - 1;       // End byte
    header("Accept-Ranges: 0-$length");
    if (isset($_SERVER['HTTP_RANGE'])) {
        $c_start = $start;
        $c_end   = $end;
        // Extract the range string
        list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2);
        // Make sure the client hasn't sent us a multibyte range
        if (strpos($range, ',') !== false) {
            header('HTTP/1.1 416 Requested Range Not Satisfiable');
            header("Content-Range: bytes $start-$end/$size");
            exit;
        }
        header("X-Got-Range: $range, $range0");
        // If the range starts with an '-' we start from the beginning
        // If not, we forward the file pointer
        // And make sure to get the end byte if spesified
        if ($range0 == '-') {
            $c_start = $size - substr($range, 1);
        } else {
            $range  = explode('-', $range);
            $c_start = $range[0];
            $c_end   = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $size;
        }
        // End bytes can not be larger than $end.
        $c_end = ($c_end > $end) ? $end : $c_end;
        // Validate the requested range and return an error if it's not correct.
        if ($c_start > $c_end || $c_start > $size - 1 || $c_end >= $size) {
            header('HTTP/1.1 416 Requested Range Not Satisfiable');
            header("Content-Range: bytes $start-$end/$size");
            // (?) Echo some info to the client?
            exit;
        }
        $start  = $c_start;
        $end    = $c_end;
        $length = $end - $start + 1; // Calculate new content length
        fseek($fp, $start);
        header('HTTP/1.1 206 Partial Content');
    }
    // Notify the client the byte range we'll be outputting
    header("Content-Range: bytes $start-$end/$size");
    header("Content-Length: $length");
    // Start buffered download
    $buffer = 1024 * 8;
    while(!feof($fp) && ($p = ftell($fp)) <= $end) {
        if ($p + $buffer > $end) {
            // In case we're only outputtin a chunk, make sure we don't
            // read past the length
            $buffer = $end - $p + 1;
        }
        set_time_limit(0); // Reset time limit for big files
        echo fread($fp, $buffer);
        flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit.
    }
    fclose($fp);
}

我通过PHP传递视频，因为文件应该只有在登录时才可见。我用部分内容/范围来做这些事情，因为我希望能够在位置栏的中间单击，视频应该从那里开始播放。

这一切都适用于Chrome、更新的Safari、iOS，但（由于Flash回退）在IE或Firefox中不起作用（视频是mp4）（也许加载只需要太长时间）

Range在Chrome中工作，但VideoJS的Flash版本甚至不要求下载Range，所以它得到了另一个版本。

如果我在Firefox中直接播放视频（使用PHP流媒体，但没有VideoJS）（只需在URL栏中调用视频URL），它会直接启动并在播放时加载；VideoJS没有

我需要改变什么才能让视频开始直接在VideoJS Flash版本中播放？