root@server:/root/ffmpeg# ffmpeg
FFmpeg version SVN-r22144, Copyright (c) 2000-2010 the FFmpeg developers
  built on Mar  2 2010 07:34:29 with gcc 4.2.4 (Ubuntu 4.2.4-1ubuntu4)
  configuration: --enable-gpl --enable-pthreads --enable-libvorbis --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libgsm --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab --disable-debug --enable-shared
  libavutil     50. 9. 0 / 50. 9. 0
  libavcodec    52.55. 0 / 52.55. 0
  libavformat   52.54. 0 / 52.54. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0.10. 0 /  0.10. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'
root@server:/root/ffmpeg# apt-get remove ffmpeg
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package ffmpeg is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@server:/root/ffmpeg# make distclean
Makefile:1: config.mak: No such file or directory
libavutil/Makefile:1: libavutil/../config.mak: No such file or directory
libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/'
libavutil/../subdir.mak:26: warning: ignoring old commands for target `libavutil/'
libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/'
libavutil/../subdir.mak:96: warning: ignoring old commands for target `libavutil/'
Makefile:232: /tests/fate.mak: No such file or directory
Makefile:233: /tests/fate2.mak: No such file or directory
Makefile:235: /tests/fate/aac.mak: No such file or directory
Makefile:236: /tests/fate/als.mak: No such file or directory
Makefile:237: /tests/fate/fft.mak: No such file or directory
Makefile:238: /tests/fate/h264.mak: No such file or directory
Makefile:239: /tests/fate/mp3.mak: No such file or directory
Makefile:240: /tests/fate/vorbis.mak: No such file or directory
Makefile:241: /tests/fate/vp8.mak: No such file or directory
make: *** No rule to make target `/tests/fate/vp8.mak'.  Stop.