[FFmpeg-trac] #7523(undetermined:new): VAAPI: Fail to Decode an H264 LP Multi-Slice Encoded Video

FFmpeg trac at avcodec.org
Thu Nov 1 00:59:14 EET 2018


#7523: VAAPI: Fail to Decode an H264 LP Multi-Slice Encoded Video
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             Reporter:  uartie       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  vaapi        |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by jkqxz):

 That isn't how I would read the documentation, though I admit it's a bit
 unclear - given that all the options are constraining the user to
 particular slice layouts, the fallback position being the most lenient
 seems inappropriate.  Perhaps it would be best if you send a patch to
 libva clarifying the documentation, and any discussion can happen there?

 In any case, this is very easy to fix on the i965 driver side to enable it
 with the stricter interpretation - add the missing `EncSliceStructure`
 attribute for the relevant LP encode entrypoints.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7523#comment:9>
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