########## H.263
[cen6@cen6 bin]$ ./ffmpeg -i videos/flower_garden_422_ntsc.y4m -vcodec h263p -s 704x576 -aspect 11:9 v.h263
ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jan 14 2015 16:20:21 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
  configuration: --prefix=/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build --extra-cflags=-I/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build/include --extra-ldflags=-L/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build/lib --bindir=/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/bin --enable-gpl --enable-libx264 --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libvpx
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, yuv4mpegpipe, from 'videos/flower_garden_422_ntsc.y4m':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: rawvideo (Y42B / 0x42323459), yuv422p, 720x486, SAR 4320:4379 DAR 6400:4379, 30 fps, 30 tbr, 30 tbn, 30 tbc
Output #0, h263, to 'v.h263':
  Metadata:
    encoder         : Lavf56.15.102
    Stream #0:0: Video: h263p, yuv420p, 704x576 [SAR 1:1 DAR 11:9], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc
    Metadata:
      encoder         : Lavc56.13.100 h263p
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h263p (native))
Press [q] to stop, [?] for help
[swscaler @ 0x3e59fc0] Warning: data is not aligned! This can lead to a speedloss
frame=  360 fps=304 q=31.0 Lsize=    1861kB time=00:00:12.00 bitrate=1270.8kbits/s
video:1861kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%



########## H.264
[cen6@cen6 bin]$ ./ffmpeg -i videos/flower_garden_422_ntsc.y4m -vcodec libx264 -s 704x576 -aspect 11:9 v.h264
ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jan 14 2015 16:20:21 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
  configuration: --prefix=/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build --extra-cflags=-I/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build/include --extra-ldflags=-L/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/ffmpeg_build/lib --bindir=/home/cen6/mio/ffmpeg/ffmpeg-2.5.2/bin --enable-gpl --enable-libx264 --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libvpx
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, yuv4mpegpipe, from 'videos/flower_garden_422_ntsc.y4m':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: rawvideo (Y42B / 0x42323459), yuv422p, 720x486, SAR 4320:4379 DAR 6400:4379, 30 fps, 30 tbr, 30 tbn, 30 tbc
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x293baa0] using SAR=1/1
[libx264 @ 0x293baa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
[libx264 @ 0x293baa0] profile High 4:2:2, level 3.1, 4:2:2 8-bit
Output #0, h264, to 'v.h264':
  Metadata:
    encoder         : Lavf56.15.102
    Stream #0:0: Video: h264 (libx264), yuv422p, 704x576 [SAR 1:1 DAR 11:9], q=-1--1, 30 fps, 30 tbn, 30 tbc
    Metadata:
      encoder         : Lavc56.13.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[swscaler @ 0x2924fc0] Warning: data is not aligned! This can lead to a speedloss
frame=  360 fps= 32 q=-1.0 Lsize=    5803kB time=00:00:11.93 bitrate=3983.5kbits/s
video:5803kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
[libx264 @ 0x293baa0] frame I:2     Avg QP:25.23  size: 91944
[libx264 @ 0x293baa0] frame P:197   Avg QP:27.13  size: 26909
[libx264 @ 0x293baa0] frame B:161   Avg QP:30.90  size:  2839
[libx264 @ 0x293baa0] consecutive B-frames: 10.6% 89.4%  0.0%  0.0%
[libx264 @ 0x293baa0] mb I  I16..4: 10.5% 69.6% 19.8%
[libx264 @ 0x293baa0] mb P  I16..4:  0.1%  0.6%  0.6%  P16..4: 35.1% 29.3% 22.1%  0.0%  0.0%    skip:12.2%
[libx264 @ 0x293baa0] mb B  I16..4:  0.0%  0.0%  0.1%  B16..8: 48.8%  5.0%  1.1%  direct: 2.7%  skip:42.3%  L0:26.5% L1:42.5% BI:31.1%
[libx264 @ 0x293baa0] 8x8 transform intra:54.9% inter:60.3%
[libx264 @ 0x293baa0] coded y,uvDC,uvAC intra: 75.2% 93.3% 80.1% inter: 35.8% 40.8% 19.8%
[libx264 @ 0x293baa0] i16 v,h,dc,p: 33% 22%  2% 43%
[libx264 @ 0x293baa0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 19% 12%  6%  8%  8%  9%  7% 14%
[libx264 @ 0x293baa0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 53% 12%  6%  3%  5%  5%  5%  3%  7%
[libx264 @ 0x293baa0] i8c dc,h,v,p: 40% 12% 37% 10%
[libx264 @ 0x293baa0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x293baa0] ref P L0: 65.5% 15.4% 10.1%  9.0%
[libx264 @ 0x293baa0] ref B L0: 89.5% 10.5%
[libx264 @ 0x293baa0] kb/s:3961.39


############## File size
[cen6@cen6 bin]$ du -h v.h263 v.h264
1.9M	v.h263
5.7M	v.h264