[mythtv-commits] Ticket #13311: VAAPI rewrite
MythTV
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Tue Sep 11 16:05:39 UTC 2018
#13311: VAAPI rewrite
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Reporter: Peter Bennett | Owner: Peter Bennett
Type: Developer Task | Status: new
Priority: minor | Milestone: 30.0
Component: MythTV - Video Decoding | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
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Comment (by Peter Bennett):
Issue comment 14 : Does it not settle down a few seconds after the jump
forward? I tried your clip. I do not see the problem, it is slightly
uneven on my system because I have a refresh rate of 60, but it is the
same before and after a jump. Perhaps you can try different interlacers,
also look at the cpu usage, does that change? Run with -v playback and
look to see if it is dropping frames when it is uneven.
CPU Load : I looked at this. It is because of the 2x VA deinterlacers. If
you change to a VA deinterlacer that is not 2x you will see less CPU
usage. The 2x VA deinterlacers produce double the frame rate (50 fps for a
25 fps video). The whole mythtv frame cycle is repeated 50 times a second.
With the 2x GL deinterlacers, only the video display part of the
processing is repeated 50 times a second, the rest of the frame cycle is
repeated only 25 times a second. There is a lot of processing in the
mythtv frame cycle, it checks for keyboard input, synchronizes
audio/video, checks for speedup, updates OSD, plus other things.
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Ticket URL: <https://code.mythtv.org/trac/ticket/13311#comment:28>
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