wget http://metavid.ucsc.edu/media/senate_proceeding_11-16-07.ogg.anx?t=0:00:30/0:01:00

mv senate_proceeding_11-16-07.ogg.anx\?t\=0\:00\:30%2F0\:01\:00 sample_anx_segment.ogg

ffmpeg -i sample_anx_segment.ogg -map 0.2 -map 0.3 -acodec mp3 -vcodec mpeg4 output.mp4
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr
  libavutil version: 1d.49.3.0
  libavcodec version: 1d.51.38.0
  libavformat version: 1d.51.10.0
  built on Jun  3 2007 20:59:25, gcc: 4.1.3 20070528 (prerelease) (Ubuntu 4.1.2-9ubuntu2)
[theora @ 0xb7e27ac8]Theora bitstream version 30200
[theora @ 0xb7e27ac8]584 bits left in packet 81
[theora @ 0xb7e27ac8]7 bits left in packet 82
Input #0, ogg, from 'sample_anx_segment.ogg':
  Duration: 00:00:29.9, start: 29.963267, bitrate: 353 kb/s
  Stream #0.0: Video: 0x0000, 1000000.00 fps(r)
  Stream #0.1: Video: 0x0000, 1000000.00 fps(r)
  Stream #0.2: Video: theora, yuv420p, 320x240, 29.97 fps(r)
  Stream #0.3: Audio: vorbis, 48000 Hz, mono, 32 kb/s
File 'output.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'output.mp4':
  Stream #0.0: Video: mpeg4, yuv420p, 320x240, q=2-31, 200 kb/s, 29.97 fps(c)
  Stream #0.1: Audio: 0x0000, 48000 Hz, mono, 64 kb/s
Stream mapping:
  Stream #0.2 -> #0.0
  Stream #0.3 -> #0.1
Unsupported codec for output stream #0.1