[FFmpeg-trac] #4187(avfilter:new): PSNR filter not returning error with different input formats

[FFmpeg]

#4187: PSNR filter not returning error with different input formats
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             Reporter:  govind    |                     Type:  defect
               Status:  new       |                 Priority:  minor
            Component:  avfilter  |                  Version:  git-master
             Keywords:  PSNR      |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 I am expecting the psnr-filter to return with error message "Inputs must
 be of same pixel format." if I try to run it on two inputs with different
 pixel format. But it is going ahead with the processing.
 I don't know if this is the default behavior. But even if one of the
 input, again it is not sure which one, is undergoing reformatting before
 being fed to the psnr-filter, shouldn't it warn user about what is
 happening internally?



 How to reproduce:
 {{{
 % ffmpeg -f rawvideo -s:v 1280x720 -pix_fmt yuv422p -i input1.yuv -f
 rawvideo -s:v 1280x720 -pix_fmt yuv420p -i input2.yuv -filter_complex psnr
 -f null -

 ffmpeg version 2.5.git Copyright (c) 2000-2014 the FFmpeg developers
   built on Dec 14 2014 15:08:09 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
   configuration:
   libavutil      54. 15.100 / 54. 15.100
   libavcodec     56. 14.100 / 56. 14.100
   libavformat    56. 15.105 / 56. 15.105
   libavdevice    56.  3.100 / 56.  3.100
   libavfilter     5.  3.101 /  5.  3.101
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100

 built on Ubuntu14.04
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4187>
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