High resolution mpeg2 encoder?

Hi Everyone, I work with high resolution projection systems and need to find an mpeg2 encoder that can produce arbitrarily sized mpeg2 elementary video streams. For example, 4096x4096 or 8192x1024 I've got my own custom playback software, but I need now a good mpeg2 encoder that can handle these resolutions. Adobe products certainly won't let me do it. I'm just now trying ffmpeg, but so far it produces garbage beyond 2048x2048. Perhaps there are particular settings required? Is there a hardwired resolution limit built into ffmpeg? If so, does anyone know of another encoder that is not limited in resolution? (Windows very much preferred) MM

Try mpeg2enc (freeware) or TMPGEnc Plus (payware).

Made progress with ffmpeg. (in my version of ffmpeg here) the swScaler has a max width of 5120, but apparently this can be increased with a recompilation. image height doesn't seem to be limited. I've just made a movie at 5120x7680. However, there are resolutions it just doesn't like. 4096x4096, for example, doesn't work. I wonder what the rules are? MM

^ mpeg2enc says: Code: