#7690: FFmpeg QSV decode + VPP performance is just a fraction of what one gets
with VA-API and MediaSDK
-------------------------------------+-------------------------------------
Reporter: eero-t | Owner:
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: git-master | Resolution:
Keywords: qsv | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by eero-t):
In the original bug report, video is scaled so small that output copy
doesn't matter.
Let's let ticket #7943 be about the extra copy (related to later comments
in this ticket), and this one about the issue in the original bug report.
I just checked it with the latest media-driver and FFmpeg git versions,
and one still needs both to:
* bind FFmpeg to single core (prefix FFmpeg with "taskset 0x1")
* set fixed GPU frequency
To get QSV performance close to VA-API performance. Without those, QSV /
VPP performance is half of the corresponding VA-API performance.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7690#comment:16>
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