mplayer can remove (or try to remove) logos (or other things on a fixed place), see
Suppresses a TV station logo by a simple interpolation of the
surrounding pixels. Just set a rectangle covering the logo and
watch it disappear (and sometimes something even uglier appear -
your mileage may vary).
top left corner of the logo
width and height of the cleared rectangle
<t> Thickness of the fuzzy edge of the rectangle (added to w
and h). When set to -1, a green rectangle is drawn on
the screen to simplify finding the right x,y,w,h parame‐
Suppresses a TV station logo, using a PGM or PPM image file to
determine which pixels comprise the logo. The width and height
of the image file must match those of the video stream being
processed. Uses the filter image and a circular blur algorithm
to remove the logo.
[path] + filename of the filter image.