You may have missed a < in the patch command. This is easy to do with the way the wiki has been written. The patch should only take a few seconds to apply.
Originally Posted by email@example.com
The command to patch mplayer is:
patch -p0 < "path-to-coreavc-for-linux"/mplayer/dshowserver.patch
Also, the dshowserver.patch doesn't install cleanly against the current mplayer svn source code (as of mplayer svn revision 27448). To get mplayer to call dshowever I had to apply the patch and then manually edit libmpcodecs/vd.c
vd.c needs &mpcodecs_vd_dshowserver, added as follows:
This is because the current mplayer svn has changed the call to CONFIG not USE. Once you add in this line you should be able to build mplayer so that playback starts.