在流媒体播放视频时视频尺寸太小

I am using flow player to play mp4 files in my site. But when I'm playing less then 10 seconds video then at starting video is too small after 2 seconds only it is showing the full width.

I have tried 3 videos

1. 4 Seconds
2. 10 Seconds
3. 12 Seconds

1,2 are having problem while 3 is not (Working fine).

Below link contains images for demonstration.

http://1drv.ms/1pe5Yrh

I have tried below code in flow player function

clip: {
       scaling : 'scale', // Used all options available in in this parameter
       autoPlay: false,
       provider: 'pseudo',
       autoBuffering: false
  }

Unfortunately I haven't found any solution by using flash player, but I'm using flowplayer5 with flash fallback :)