[MPlayer-users] Re: 1080i to 1080p mpeg2 or x264?

[Loren Merritt]

On Tue, 28 Feb 2006, Steven Adeff wrote:
> On 2/28/06, RC <rcooley at spamcop.net> wrote:
>> On Mon, 27 Feb 2006 20:18:06 -0500
>> "Steven Adeff" <adeffs.mythtv at gmail.com> wrote:
>>
>>> I noticed this too. Whats weird is the source is 1080, but I did
>>> expand=0:-8:0:0 and it fixed it.
>>
>> Actually, I'd much rather recomend cropping 8 lines instead...  If you
>> don't like that option for some reason, up-scaling to 1088 should be
>> much better (effecient) than adding a black bar.
>
> I guess thats the problem. Remove data or deal with the encoding
> inneficiencies of a black bar at the bottom of the video(or would it
> be better to be at the top?)

At least in x264, it's more efficient to leave it at 1080 and let x264 
decide what to stuff in the bar, rather than force blackness. Any 
compliant h264 decoder will crop it off on playback.
(of course, scaling/cropping to 1088 or 1072 also work)

> Though I don't know if the processing time is worth the space trade
> off to go to mpeg2 so right now this is more academic for me...

Then try mpeg4.

--Loren Merritt