[MPlayer-dev-eng] SN40 Codec

[Reimar Döffinger]

On Tue, Mar 10, 2009 at 11:12:20AM -0400, Brian Victor wrote:
> On Tue, Mar 10, 2009 at 02:28:42PM +0000, Alex Beregszaszi wrote:
> >On Tue, 2009-03-10 at 10:15 -0400, Brian Victor wrote:
> >> We need to transcode video files with a fourcc of "SN40".  I tried to
> >> create a videocodec block for it, but couldn't quite get it right.
> >> Since win32-codec-howto.txt recommends mailing this list, I am doing so.
> >This is the usual MPEG4, just add that fourcc to the ffmpeg4 section.
> 
> Excellent observation.
> 
> What I'm seeing during playback now is two vertically-squashed images on
> top of each other.  My neophyte mind conjectures that interlacing is
> involved, but that's as far as I'll guess.

Then that's how your camera encoded it. MPlayer won't add support for
this specifically I think, but you are lucky that there is a filter that
can do any manipulation you want. It won't be real-time (probably), but
should work:
-vf geq='p(X\, (Y-mod(Y\,2))/2 + mod(Y\,2)*(H/2))'