[FFmpeg-trac] #7564(avfilter:new): hwdownload fails when size changes

FFmpeg trac at avcodec.org
Mon Nov 26 11:30:31 EET 2018


#7564: hwdownload fails when size changes
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             Reporter:  msiders     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  hwdownload  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by msiders):

 Hi,

 And to demonstrate that the bug isn't related to CUDA, but to "hwdownload"
 I ported the example to QSV:

 {{{
 % ffmpeg -stream_loop -1 -y \
  -loglevel error \
  -hwaccel qsv \
  -c:v h264_qsv \
    -i "https://samples.ffmpeg.org/MPEG2/mpegts-klv/Day%20Flight.mpg" \
  -filter_complex
 "hwdownload,format=nv12,scale=400:300,hwupload=extra_hw_frames=32,hwdownload,format=nv12,fps=25,scale=800:600"
 \
  -c:v h264 \
  -f mpegts out.ts
 }}}

 The output shows the exact same bug!

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Ticket URL: <https://trac.ffmpeg.org/ticket/7564#comment:7>
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