ffmpeg -i /tmp/input.mp4 -threads 0 -vcodec mpeg2video -pix_fmt yuv422p -qscale 1 -qmin 1 -intra -an -crf 0 -s 720x576 -preset veryslow -t 60 -ss 300 /tmp/testout.mpg
ffmpeg version 0.8.9-6:0.8.9-1, Copyright (c) 2000-2013 the Libav developers
  built on Nov  3 2013 00:54:50 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/input.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2013-06-23 17:36:13
  Duration: 00:38:43.15, start: 0.000000, bitrate: 829 kb/s
    Stream #0.0(eng): Video: h264 (Main), yuv420p, 848x480 [PAR 1:1 DAR 53:30], 698 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata:
      creation_time   : 2013-06-23 17:36:13
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time   : 2013-06-23 17:36:13
[buffer @ 0x12b9c40] w:848 h:480 pixfmt:yuv420p
[scale @ 0x1543f80] w:848 h:480 fmt:yuv420p -> w:720 h:576 fmt:yuv422p flags:0x4
[mpeg @ 0x12b94e0] VBV buffer size not set, muxing may fail
Output #0, mpeg, to '/tmp/testout.mpg':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2013-06-23 17:36:13
    encoder         : Lavf53.21.1
    Stream #0.0(eng): Video: mpeg2video, yuv422p, 720x576 [PAR 106:75 DAR 53:30], q=1-31, 200 kb/s, 90k tbn, 29.97 tbc
    Metadata:
      creation_time   : 2013-06-23 17:36:13
Stream mapping:
  Stream #0.0 -> #0.0
Press ctrl-c to stop encoding
[buffer @ 0x12b9c40] Buffering several frames is not supported. Please consume all available frames before adding a new one.
    Last message repeated 8991 times186kB time=59.06 bitrate=19167.6kbits/s    ts/s
frame= 1798 fps= 41 q=1.0 Lsize=  140736kB time=59.96 bitrate=19228.0kbits/s
video:140217kB audio:0kB global headers:0kB muxing overhead 0.369994%
ffmpeg -i /tmp/input.mp4 -threads 0 -vcodec mpeg2video -pix_fmt yuv422p  1  1  37.59s user 3.54s system 92% cpu 44.651 total