C:\cli>ffmpeg\bin\ffmpeg.exe -i "V:\infile.mpg"
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov  5 2012 17:56:17 with gcc 4.7.2 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --en
able-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --e
nable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --e
nable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, mpeg, from 'V:\infile.mpg':
  Duration: 00:21:00.64, start: 0.382122, bitrate: 38039 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (High), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0xa0]: Audio: pcm_s16be, 48000 Hz, stereo, s16, 1536 kb/s
At least one output file must be specified

C:\cli>ffmpeg\bin\ffmpeg.exe -i "V:\outfile.m2v"
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov  5 2012 17:56:17 with gcc 4.7.2 (GCC)
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --en
able-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --e
nable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --e
nable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[mpegvideo @ 0063e960] Estimating duration from bitrate, this may be inaccurate
Input #0, mpegvideo, from 'V:\outfile.m2v':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: mpeg2video (High), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
At least one output file must be specified