hi! I tried out the FIELD_ALTERNATE in bttv-0.9.6 with kernel 2.5.60. It seems that it's working, but the framerate is only 25. I guess it should be 50 (PAL). It always gives another type of field (opposite) at the given moment compared to the previous one but I wonder why the fps is only 25. I use mmapped method and V4L2. Any ideas? Maybe I do something wrong... thanks, gabor