[FFmpeg-trac] #9332(ffmpeg:new): Flickering white when using scale and zoompan

[FFmpeg]

#9332: Flickering white when using scale and zoompan
----------------------------------+---------------------------------------
             Reporter:  mucikiki  |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  ffmpeg    |                  Version:  unspecified
             Keywords:  scale     |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+---------------------------------------
 Summary of the bug:
 When I try to zoom an image, if this image has a white background
 (255,255,255) I obtain an output with a variable white (between
 255,255,255 and 255,254,255). It is ok with other colors.

 How to reproduce:
 {{{
 % ffmpeg -f image2 -loop 1 -t 6.2 -r 29.97 -i xxxx -c:v libx264 -profile:v
 main -pix_fmt yuv420p -level:v 3.1 -crf 24 -color_primaries bt709
 -color_trc bt709 -colorspace bt709 -y -filter_complex
 "[0:v]scale=12800x7200,zoompan=z='min(zoom+0.0015,1.5)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=184:fps=29.97:s=1280x720,trim=duration=6.2[filtered]"
 ffmpeg version N-48944-g9b069eb14e-static
 https://johnvansickle.com/ffmpeg/
 built on gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9332>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker