[MPlayer-dev-eng] enhancement for yuv4mpeg output driver

RC rcooley at spamcop.net
Wed Jan 19 11:11:43 CET 2005

On Wed, 19 Jan 2005 00:41:05 -0800 (PST)
"Steven M. Schultz" <sms at 2BSD.COM> wrote:

> Since when did NTSC become a 540 line
> 	video system (or a 528 line system for that matter)? :-)

Since when did mplayer restrict itself to analog display standards,
rather than defaulting to maximum quality?

MPlayer isn't equipt to output interlaced material to interlaced
displays anyhow.  Why take steps to preserve the interlacing when it
needs to be deinterlaced anyhow?

> 	Increasing the number of vertical lines is done by interpolation
> 	isn't it and with interlaced material upscaling vertically is to
> 	be avoided.  A sight downsampling horizontally would be better
> 	for the quality (and the graphics card might even help out).
> 	Leave the vertical dimension alone would be A Real Good Thing.

You can have mplayer do this quite easily.  Add "-vf scale=-2:-1" to
your command-line.  You'll need to be using 1.0pre6 or later, as I
didn't submit the patch to fix vf_scale until after pre5.

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