[MPlayer-dev-eng] vo development and swscaler

[Reimar Döffinger]

On Mon, Mar 30, 2009 at 06:06:50PM +0100, Samuel Garcia wrote:
> However, if I try to scale down a video, say from 32:64 to 16:32, I get 
> wierd results from the colors. For example, a black screen with a red 
> line down it, scales down to a smudged white line. It is as if the 
> swscaler does not understand the color space correctly.

Please be more specific. At least missing information:
1) the source colourspace (-v might help finding out)
2) what does "a red line down it"?
3) how do you know the line is red? In particular since with YV12
colourspace it is impossible to have a single line with a specific
colour, since the colour is given always for two lines together.