>> Especially when trying to get mplayer >> to work with customtex files on Windows ("[gl] Error parsing >> customtex" is a problem from vo_gl.c). > > What format is the customtex file in? > EIther way it might be fixed. > I found the problem with loading the customtex file under Windows: the vo_gl.c code opens the custom tex file (which I presume will almost always be an image file) but doesn't specify binary mode: FILE *f = fopen(custom_tex, "r"); Changing this to FILE *f = fopen(custom_tex, "rb"); corrects the loading of binary textures. I'm not sure why the binary indicator is not required on MacOSX which happily loads the same image textures.