I tested the latest mplayer on omap overlay using mpeg4 720p video.
Compared with omapfbplay I found some small differences
1. some thin raster lines appear near a moving object.
2. some fast parts of images are tearing
I wonder if the mplayer uses different mpeg4 decoder or codes.
I use big_buck_bunny_720p_stereo.avi. I don't think it is caused by
interlaced scanning. The raster thin lines are spaced vertically about
16 pixels I guess, macroblock size. Since the decoder copies slices
(16 pixels vertically) into video buffer each time, maybe edges are
not processed properly in case of motion. I don't see them in PC