ffmpeg command

@ubuntu:~$ ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1024x768 -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre ultrafast -threads 0 ~/Desktop/music.mkv
ffmpeg version 0.8.8-4:0.8.8-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  built on Oct 22 2013 12:31:55 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[alsa @ 0x21997a0] capture with some ALSA plugins, especially dsnoop, may hang.
[alsa @ 0x21997a0] Estimating duration from bitrate, this may be inaccurate
Input #0, alsa, from 'pulse':
  Duration: N/A, start: 1384213825.607113, bitrate: N/A
    Stream #0.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
[x11grab @ 0x219a4e0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 height: 768
[x11grab @ 0x219a4e0] shared memory extension  found
[x11grab @ 0x219a4e0] Estimating duration from bitrate, this may be inaccurate
Input #1, x11grab, from ':0.0':
  Duration: N/A, start: 1384213825.669167, bitrate: 754974 kb/s
    Stream #1.0: Video: rawvideo, bgra, 1024x768, 754974 kb/s, 30 tbr, 1000k tbn, 30 tbc
Unrecognized option 'preset'
/usr/share/avconv/libx264-ultrafast.avpreset: Invalid option or argument: 'preset=ultrafast', parsed as 'preset' = 'ultrafast'