ffmpeg TODO list:

- Add ASF format.

- add MJPEG codec.

- fix skip frame bug in mpeg video

- fix G2 audio problem (bad volume in AC3 ?)

- use non zero motion vectors.

- test fifo & master handling

- deny & allow + password.

- Improve psycho acoustic model for AC3 & mpeg audio.

- Improve the bit rate control for video codecs.