Warnings shown for likely invalid real-life H.264 stream

[Carl Eugen Hoyos]

​http://ffmpeg.org/pipermail/ffmpeg-user/2016-November/034184.html
Pelco ES5230 cameras send a stream via rtsp that shows many errors when decoded with FFmpeg.

$ ffmpeg -i PelcoES5230.h264
ffmpeg version N-82235-g222f59a Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --enable-gnutls
  libavutil      55. 35.100 / 55. 35.100
  libavcodec     57. 66.101 / 57. 66.101
  libavformat    57. 57.100 / 57. 57.100
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 66.100 /  6. 66.100
  libswscale      4.  3.100 /  4.  3.100
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 159
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
    Last message repeated 27 times
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 160
    Last message repeated 1 times
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
    Last message repeated 27 times
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 160
    Last message repeated 1 times
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
    Last message repeated 12 times
[h264 @ 0x2ca1ac0] SEI type 5 size 368 truncated at 160
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
    Last message repeated 13 times
[h264 @ 0x2ca1ac0] SEI type 5 size 352 truncated at 160
    Last message repeated 1 times
[h264 @ 0x2ca1ac0] SEI type 5 size 360 truncated at 160
    Last message repeated 17 times
Input #0, h264, from 'PelcoES5230.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 1200k tbn, 60 tbc
At least one output file must be specified