[MPlayer-users] video scaling doesn't work

Grant emailgrant at gmail.com
Tue Feb 11 16:46:00 CET 2014

>>> >> I'm using omapfb and video scaling doesn't seem to work.  Does
>>> >> know if it should work and if there's anything I can do to get it
>>> >> working?
>>> >
>>> > "omapfb" meaning what?
>>> > The X11 omapfb driver? You should ask on their list.
>>> > There is no omapfb vo in MPlayer, that is not supported by us
>>> > if that's what you use.
>>> > Either way, upscaling needs special kernel support and userspace
>>> > is updated to make use of this support.
>>> Does mplayer have swscale capabilities like vlc?
>>Yes, see options -zoom, -sws and -vf scale.
> I can only highly recommend to look for a proper solution. Unless you only care about playing 320x480 videos on a screen with not much higher resolution it won't work.
> There is a very good reason for all that scaling hardware to be in the SoC, ignoring it instead of making it work won't get you far.

I'm not up to the challenge of programming scaling support into omapfb
so I can either prescale with mencoder/ffmpeg or try to get mplayer to
scale on the fly.  This works nicely except the video only appears in
the top 35% of the screen:

mplayer -vf scale=1360:-1 -fs file.mp4

- Grant

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