[MEncoder-users] compression: 1080i versus 720p

[RC]

On Thu, 17 Dec 2009 09:45:10 -0600
Matyas <mplayer.list at sustik.com> wrote:

> The resulting bitrate for the 1080i sources varied between 1100
> and 1900.  For the 720p sources it was over 2000.  The 720p source
> is more dynamic but I still was surprised to see the much higher
> bitrate on a smaller resolution.
> 
> Could you comment on this observation?

When you deinterlace the 1080i video, you're reducing it to 30fps.  720p
is typically 60fps, which has more similarity to interlaced video. 

So, if you don't deinterlace the 1080i video, you'll probably see them
using a higher bitrate.

-- 
Ha. I'm the idiot.