Bug#670236: mplayer2: can't play video with resolution of 2542x1080

[Uoti Urpala]

This is a limitation reported by libXv. It's likely due to limitations
of your graphics hardware. You can try other output methods such as gl,
but it's likely they won't work well either on such hardware.

Using --xy=0.5 won't help, because that will try to do the scaling in
hardware, but the limitation is about hardware input image size. You can
force software scaling on CPU with options like "--vf=scale=1920:-2".
This would add a filter to do software scaling to a width of 1920 and a
height that keeps the original aspect ratio, which should fit within the
limitations of your hardware. You may want to adjust the value of 1920
if you have a monitor smaller or larger than that.