[FFmpeg-trac] #7724(undetermined:new): [FFmpeg-vaapi] HEVC 4K/FHD to AVC 4K/FHD transcoding failed

[FFmpeg]

#7724: [FFmpeg-vaapi] HEVC 4K/FHD to AVC 4K/FHD transcoding failed
-------------------------------------+-------------------------------------
             Reporter:  andreyor     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  vaapi        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by andreyor):

 Input stream:
 http://fate-suite.ffmpeg.org/hevc-conformance/AMP_A_Samsung_4.bit

 Full output:
 {{{
 ./ffmpeg.N-93001-g87c165c237 -y -hwaccel vaapi -vaapi_device
 /dev/dri/renderD128 -hwaccel_output_format vaapi -i $STREAM -frames 500
 -c:v h264_vaapi -b:v 25000k -minrate:v 25000k -maxrate:v 25000k
 -compression_level 4 -g 256 -bf 2 0001_4K02_1_0.h264 ffmpeg version
 N-93001-g87c165c237 Copyright (c) 2000-2019 the FFmpeg developers
   built with gcc 7 (Ubuntu 7.3.0-27ubuntu1~18.04)
   configuration: --prefix=/msdk/FFmpeg/ffmpeg_build --enable-libmfx
   libavutil      56. 26.100 / 56. 26.100
   libavcodec     58. 44.100 / 58. 44.100
   libavformat    58. 26.100 / 58. 26.100
   libavdevice    58.  6.101 / 58.  6.101
   libavfilter     7. 48.100 /  7. 48.100
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
 Input #0, hevc, from 'AMP_A_Samsung_4.bit':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1600, 25 fps, 25
 tbr, 1200k tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (hevc (native) -> h264 (h264_vaapi))
 Press [q] to stop, [?] for help
 Impossible to convert between the formats supported by the filter
 'Parsed_null_0' and the filter 'auto_scaler_0'
 Error reinitializing filters!
 Failed to inject frame into filter network: Function not implemented
 Error while processing the decoded data for stream #0:0
 Conversion failed!
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/7724#comment:3>
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