[Bug 55913] New: Vdpau driver lag

[Bug 55913] New: Vdpau driver lag

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

          Priority: medium
            Bug ID: 55913
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Vdpau driver lag
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: markurujapan@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/DRI/R600
           Product: Mesa

Created attachment 68485
  --> https://bugs.freedesktop.org/attachment.cgi?id=68485&action=edit
vdpau output

You said was now ready vdpau but when I try to watch a movie with this output
on my radeon 4650 , the video run with some lag :(

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

francesco <markurujapan@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |high

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/DRI/R600            |Drivers/Gallium/r600

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

--- Comment #1 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #0)
> Created attachment 68485 [details]
> vdpau output
> 
> You said was now ready vdpau but when I try to watch a movie with this
> output on my radeon 4650 , the video run with some lag :(

R600 vdpau decode isn't perfect, depending on content you may notice some
inaccuracy.

With x86, it probably won't beat CPU decode unless you have something old/slow
and single core.

The lag you see I can recreate - it seems to be a mplayer2 issue, "real"
mplayer works OK for me.

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

--- Comment #2 from francesco <markurujapan@gmail.com> ---
Yes, really, is a issue of mplayer2, with mplayer I don't have any problem, you
can close this bug. Xv is more efficient on my pc.

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

Andy Furniss <lists@andyfurniss.entadsl.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #3 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
Xv is a bit faster for me, but software decode + -vo vdpau can give a better
vsync than Xv in some circumstances.

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

Grigori Goronzy <greg@chown.ath.cx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|NOTOURBUG                   |---

--- Comment #4 from Grigori Goronzy <greg@chown.ath.cx> ---
mplayer2 uses advanced VDPAU functionality that mplayer does not use - the
presentation queue. This works fine with Nvidia's implementation. Likely the
bug is in Mesa's implementation of the presentation queue.

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

--- Comment #5 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #4)
> mplayer2 uses advanced VDPAU functionality that mplayer does not use - the
> presentation queue. This works fine with Nvidia's implementation. Likely the
> bug is in Mesa's implementation of the presentation queue.

Maybe, but maybe it's something as simple as the fact (or way) that mesa vdpau
is vsynced.

Some further testing results -

Use VDPAU_TRACE=1 and grep/awk/bash to get the diffs from the timestamps
mplayer2 uses on vdp_presentation_queue_display.

Playing 25 fps on a 60Hz screen looks OK ish for a while -

50030334
33349000
50022000
33350000
50022000
33348000
50023000
33349000
50022000
33349000
33356334
33333332
50029334

but then when it starts lagging mplayer2 is asking for longer intervals -

100052334
16682334
100046000
16673000
100046000
16674000
83333330
66728336
83371000
66697000
83372000
66697000
83370000
66699000
83370000

First thought it's trying to framedrop - maybe my GPU is too slow (it's
powerful but set to low).

Turn it up and no lag - me thinks that's it then, but then mplayer works so
another test.

GPU on low again but screen @120Hz also = no lag, so it's not just perf.

If you know mplayer2 code well perhaps that will tell yoou something.

Another separate observation SD or HD just -vo seems to work but the %cpu shown
for vo rises. It seems it's rate of rise decreased as it gets higher so I don't
know if it will ever get to 100 and start lagging.

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[Bug 55913] Vdpau driver lag

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https://bugs.freedesktop.org/show_bug.cgi?id=55913

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |MOVED

--- Comment #6 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/424.

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