Yes, MPlayer runs on Windows under Cygwin and MinGW. It does not have a GUI yet, but the command line version is almost completely functional. Patches are always welcome. You should check out the MPlayer-cygwin mailing list for help and latest information.
Best results are achieved with the native DirectX video output driver (-vo directx) and the native Windows waveout audio driver (-ao win32). Alternatives are OpenGL and SDL, but OpenGL performance varies greatly between systems and SDL is known to distort sound and video or crash on some systems. If the image is distorted, try turning off hardware acceleration with -vo directx:noaccel. Download DirectX 7 header files to compile the DirectX video output driver. Furthermore you need to have DirectX 7 or later installed for the DirectX video output driver to work.
VIDIX now works under Windows as -vo winvidix, although it is still experimental and needs a bit of manual setup. Download dhahelper.sys or dhahelper.sys (with MTRR support) and copy it to the libdha/dhahelperwin directory in your MPlayer source tree. Open a console and change to that directory. Then type
gcc -o dhasetup.exe dhasetup.cand execute
dhasetup.exe installas Administrator. After that you will have to reboot. When you are done, copy the .so files from vidix/drivers to the mplayer/vidix directory relative to your mplayer.exe.
For best results MPlayer should use a colorspace that your video card supports in hardware. Unfortunately many Windows graphics drivers wrongly report some colorspaces as supported in hardware. To find out which, try
mplayer -benchmark -nosound -frames 100 -vf format=colorspace moviewhere colorspace can be any colorspace printed by the -vf format=fmt=help option. If you find a colorspace your card handles particularly bad -vf noformat=colorspace will keep it from being used. Add this to your config file to permanently keep it from being used.
There are special codec packages for Windows available on our codecs page to allow playing formats for which there is no native support yet. Put the codecs somewhere in your path or pass --with-codecsdir=c:/path/to/your/codecs (alternatively --with-codecsdir=/path/to/your/codecs only on Cygwin) to configure. We have had some reports that Real DLLs need to be writable by the user running MPlayer, but only on some systems (NT4). Try making them writable if you have problems.
You can play VCDs by playing the .DAT or .MPG files that Windows exposes on VCDs. It works like this (adjust for the drive letter of your CD-ROM):
DVDs also work, adjust -dvd-device for the drive letter of your DVD-ROM:
mplayer dvd://<title> -dvd-device d:
The Cygwin/MinGW console is rather slow. Redirecting output or using the -quiet option has been reported to improve performance on some systems. Direct rendering (-dr) may also help. You can prevent OSD flicker through double buffering with the -double option. If playback is jerky, try -autosync 100. If some of these options help you, you may want to put them in your config file.
Sascha Sommer releases official Windows binaries from time to time, Joey Parrish makes unofficial Windows packages complete with installer. Look for these in the Windows section of our projects page.
You need to run Cygwin 1.5.0 or later in order to compile MPlayer.
DirectX header files need to be extracted to /usr/include/ or /usr/local/include/.
Instructions and files for making SDL run under Cygwin can be found on the libsdl site.
Installing a version of MinGW that could compile MPlayer used to be quite tricky, but it works out of the box now. Just install MinGW 3.1.0 or later and MSYS 1.0.9 or later and tell the MSYS postinstall that MinGW is installed.
Extract DirectX header files to /mingw/include/.
MOV compressed header support requires zlib, which MinGW does not provide by default. Configure it with --prefix=/mingw and install it before compiling MPlayer.