#7375: kmsgrab not working on AMD cards
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Reporter: tildearrow | Owner:
Type: defect | Status: closed
Priority: normal | Component: avdevice
Version: git-master | Resolution: invalid
Keywords: kmsgrab | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by jkqxz):
* status: new => closed
* resolution: => invalid
Comment:
DRM objects used for scanout need not be CPU-mappable, so there is no
guarantee that kmsgrab output will be downloadable directly as you are
trying to do here.
On AMD external GPUs it should be mappable to VAAPI, and then can be
downloaded from there - e.g. something like:
{{{
ffmpeg -device /dev/dri/card1 -f kmsgrab -i - -vf
'hwmap=derive_device=vaapi,hwdownload,format=bgr0' -c:v libx264 out.mp4
}}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/7375#comment:1>
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