autoeye-1@autoeye1-desktop:~/ffmpeg/ffmpeg-2.6.2$ ./ffprobe iceage_720x480_491.yuv
ffprobe version 2.6.2 Copyright (c) 2007-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration:
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
[IMGUTILS @ 0x7ffc8b17d190] Picture size 0x0 is invalid
[IMGUTILS @ 0x7ffc8b17cce0] Picture size 0x0 is invalid
[rawvideo @ 0x29a9c60] Could not find codec parameters for stream 0 (Video: rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
iceage_720x480_491.yuv: Operation not permitted
autoeye-1@autoeye1-desktop:~/ffmpeg/ffmpeg-2.6.2$ ls -l iceage_720x480_491.yuv
-rwxr-xr-x 1 autoeye-1 autoeye-1 254534400 May  6 12:15 iceage_720x480_491.yuv