Wrong polarity for mjpeg in avi

[Carl Eugen Hoyos]

​http://news.gmane.org/gmane.comp.video.ffmpeg.user
A user uploaded a mjpeg sample that has wrong polarity with FFmpeg, the sample looks correct if 493296800c4cfd76561f71ded5f0893108063e67 gets removed.
Related to ticket #362 and ticket #5523

$ ffmpeg -i titel_cut.avi -qscale 2 -vframes 14 out.avi
ffmpeg version N-80298-g15f9189 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 46.100 / 57. 46.100
  libavformat    57. 37.101 / 57. 37.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.101 /  6. 46.101
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, avi, from 'titel_cut.avi':
  Duration: 00:00:00.64, start: 0.000000, bitrate: 32000 kb/s
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 736x560, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Please use -q:a or -q:v, -qscale is ambiguous
[swscaler @ 0x22539e0] deprecated pixel format used, make sure you did set range correctly
[avi @ 0x2218900] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    Last message repeated 1 times
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf57.37.101
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 736x560, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc57.46.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 192 kb/s
    Metadata:
      encoder         : Lavc57.46.100 ac3
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg4 (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> ac3 (native))
Press [q] to stop, [?] for help
frame=   14 fps=0.0 q=2.0 Lsize=     186kB time=00:00:00.97 bitrate=1558.5kbits/s speed=12.1x 
video:152kB audio:23kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.105284%