FILE: record.sh

#!/bin/bash
read -p "Enter the file name:" name
ffmpeg -f x11grab -s 1366X768 -r 30 -i :0.0 ~/$name.mpg

----------------- Output

ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Aug 13 2013 19:30:00 with gcc 4.7 (SUSE Linux)
  configuration: --shlibdir=/usr/lib64 --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared --disable-static --enable-debug --disable-stripping --extra-cflags='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -fPIC -I/usr/include/gsm' --enable-gpl --enable-x11grab --enable-version3 --enable-pthreads --enable-avfilter --enable-libpulse --enable-libvpx --enable-libopus --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-libx264 --enable-libschroedinger --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-postproc --enable-libdc1394 --enable-librtmp --enable-libfreetype --enable-avresample --enable-libtwolame --enable-libvo-aacenc
  libavutil      52. 38.100 / 52. 38.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.100 / 55. 12.100
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 79.101 /  3. 79.101
  libavresample   1.  1.  0 /  1.  1.  0
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[x11grab @ 0xd64a80] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1366 height: 768
[x11grab @ 0xd64a80] shared memory extension found
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1376639299.134194, bitrate: 1007124 kb/s
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1366x768, 1007124 kb/s, 30 tbr, 1000k tbn, 30 tbc
[mpeg @ 0xd82ba0] VBV buffer size not set, muxing may fail
Output #0, mpeg, to '/home/aiena/.mpg':
  Metadata:
    encoder         : Lavf55.12.100
    Stream #0:0: Video: mpeg1video, yuv420p, 1366x768, q=2-31, 200 kb/s, 90k tbn, 30 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> mpeg1video)
Press [q] to stop, [?] for help
[swscaler @ 0xd4e080] Warning: data is not aligned! This can lead to a speedloss
[mpeg1video @ 0xd83100] warning, clipping 1 dct coefficients to -255..255
frame=  438 fps= 30 q=31.0 Lsize=    2714kB time=00:00:14.56 bitrate=1526.3kbits/s
video:2701kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.473638%
Received signal 2: terminating.

-------------------

How do get rid of the:
[mpeg @ 0xd82ba0] VBV buffer size not set, muxing may fail

and align data properly to avoid:
[swscaler @ 0xd4e080] Warning: data is not aligned! This can lead to a speedloss