[FFmpeg-trac] #7103(avcodec:new): corruption with VAAPI when playing VC-1 interlaced

[FFmpeg]

#7103: corruption with VAAPI when playing VC-1 interlaced
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             Reporter:  aufkrawall   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avcodec      |                  Version:
             Keywords:               |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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 When playing a VC-1 interlaced file with

 ffmpeg -hwaccel vaapi -i "1080i_vc-1_29.97fps.mkv" -f matroska - | ffplay
 -

 I get corrupted and extremely stuttery video output:
 https://abload.de/img/screenshot20180323132pssrx.png

 VDPAU works without issues with this format. However, VAAPI works fine
 with VC-1 non-interlaced and other formats.
 Linux 4.15 and 4.16
 mesa-git 18.1.0_devel.101112.ccc64f3133
 ffmpeg 3.4.2 and 3.5.r90415.g4e1307c0f7

 Can gladly provide logfiles if required.

 Sample:
 https://drive.google.com/file/d/0BwxFVkl63-lERnhlY1pHeW5wbjQ/view?usp=sharing
 (provided by Kodi Wiki)

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Ticket URL: <https://trac.ffmpeg.org/ticket/7103>
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