libswresample   0.  7.100 /  0.  7.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, flv, from '19-2.flv':
  Metadata:
    encoder         : Lavf53.0.3
  Duration: 00:06:32.09, start: 0.000000, bitrate: 700 kb/s
    Stream #0:0: Video: h264 (High), yuv420p, 1280x720, 400 kb/s, 25 tbr, 1k tbn, 2k tbc
    Stream #0:1: Audio: aac, 44100 Hz, mono, s16, 256 kb/s
File '19-2.mp4' already exists. Overwrite ? [y/N] y
w:1280 h:720 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
[scale @ 0xb187e00] w:1280 h:720 fmt:yuv420p -> w:480 h:320 fmt:yuv420p flags:0x4
x264 [error]: invalid preset 'ipod640'
[libx264 @ 0xadbb280] Error setting preset/tune ipod640/(null).
Output #0, mp4, to '19-2.mp4':
  Metadata:
    encoder         : Lavf53.0.3
    Stream #0:0: Video: h264, yuv420p, 480x320, q=-1--1, 90k tbn, 25 tbc
    Stream #0:1: Audio: none, 44100 Hz, 2 channels, s16, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (aac -> libfaac)
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, ra
te, width or height