[FFmpeg-trac] #9184(avfilter:open): pngdec output frame that has double image

FFmpeg trac at avcodec.org
Mon Jul 26 02:50:41 EEST 2021

#9184: pngdec output frame that has double image
             Reporter:  akoryagin    |                    Owner:  (none)
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avfilter
              Version:  unspecified  |               Resolution:
             Keywords:  artefact on  |               Blocked By:
  the video                          |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Comment (by Pljushevij):

 I was replacing scale_qsv like this and now all works perfect:

 ffmpeg-4.4 -init_hw_device qsv=hw -filter_hw_device hw -c:v h264_qsv -i
 sailboat.ts -filter_complex
 -c:v h264_qsv -b:v 3M -maxrate 3M -c:a copy -y -movflags +faststart test-

 But may you can help me make this by VAAPI?
Ticket URL: <https://trac.ffmpeg.org/ticket/9184#comment:17>
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