[FFmpeg-trac] #6491(undetermined:new): FFMPEG crashes when trying to crop 1080p60 video to 1440x1080 and interlace

[FFmpeg]

#6491: FFMPEG crashes when trying to crop 1080p60 video to 1440x1080 and interlace
-------------------------------------+-------------------------------------
             Reporter:  alexpigment  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  crash,       |               Blocked By:
  ffmpeg, 1080i, 1440x1080,          |  Reproduced by developer:  0
  interlace, crop                    |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When using a real 1080p60 video source (i.e. not lavfi), attempting to
 both crop to 1440x1080 and then interlace causes FFMPEG to crash. The same
 video can be either cropped or interlaced individually with success. Also,
 doing the cropping and interlacing in two subsequent encodes works as
 expected. Interestingly, if I crop, scale to 720x480, then interlace in a
 single encode, this works as expected.

 How to reproduce:

 Use included sample (or perhaps another 1080p60 video) and then use the
 following command line:
 {{{
 % ffmpeg -i 1080p60sample.mp4 -vf crop=1440:1080,interlace=scan=tff -c:v
 libx264 -x264-params tff -flags +ilme+ildct -an output.mp4
 }}}

 ffmpeg version N-86537-gae6f6d4
 built on 2017-06-20

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Ticket URL: <https://trac.ffmpeg.org/ticket/6491>
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