I think pre-transcoding will help. If you still get stuttering after pre-transcoding a file, one useful tip is to lower the video bitrate slider setting in the Device Settings dialog (Performance page) for your device. Go to the Media Devices dialog and edit your device to see this setting. The video bitrate slider setting will lower the bitrate when transcoding so that your device can handle the transcoded video. After changing the slider, you will need to pre-transcode the file to see the effect.