[FFmpeg-trac] #7534(undetermined:closed): I used ffmpeg 4.02 + rockchip_mpp +libdrm to decodec H264 and get a AVFrame , this format is DRM_PRIME, how do i convert to a cv::mat or bgr or yuv420p?

[FFmpeg]

#7534: I used ffmpeg 4.02 + rockchip_mpp  +libdrm to decodec H264 and get a
AVFrame ,this format is DRM_PRIME,how do i convert to a cv::mat or bgr or
yuv420p?
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             Reporter:  gtom         |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:  invalid
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by gtom):

 Thanks for you.but ,when i used this function,my cpu form 20% increase to
 50%.Is this a high occupancy operation?
 Replying to [comment:1 heleppkes]:
 > Use av_hwframe_transfer_data.
 >
 > Do note that this is an issue tracker, not a support forum.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7534#comment:3>
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