jwplayer - 回退到直接下载

Question

在 JwPlayer 中，如何回退播放模式以直接下载？

我的场景是RTMP->HLS->Direct Download

我当前的代码：

            jwplayer("<?php echo $this->id?>").setup({

                    autostart: 'true' ,
                    flashplayer: "<?php echo CHtml::asset($this->_path.'/jwplayer.flash.swf')?>",
                    width:<?php echo $this->width?>,
                    height:<?php echo $this->height?>,
                    playlist: [{
                        sources: [
                        {
                           //Desktop: Use RTMP protocol and played by flash.
                            file: "<?php echo $this->rtmpPath;?>"
                        },
                        {
                            //Mobile: Use HLS protocol and played by HTML5
                            file: "<?php echo $this->hlsPath;?>",
                        },
{
                            //Direct Download
                             ??
                            file: "<?php echo $this->ddPath;?>",
                        },
                        ]
                    }],
                    primary:"html5",
                });

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