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vo_opengl: replace tscale-interpolates-only with interpolation-threshold

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The previous approach was too naive, and can e.g. ruin playback if
scheduling switches e.g. between 1 and 2 vsync per frame.
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wm4
2016-01-27 21:07:17 +01:00
parent 7b6e3772ab
commit 34bead4859
4 changed files with 28 additions and 13 deletions
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16
DOCS/man/vo.rst
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@@ -549,9 +549,19 @@ Available video output drivers are:
manifest themselves as short flashes or fringes of black, mostly
around moving edges) in exchange for potentially adding more blur.
``tscale-interpolates-only=<yes|no>``
If set, then don't perform interpolation if the playback rate matches
the display refresh rate (default: yes).
``interpolation-threshold=<0..1,-1>``
Threshold below which frame ratio interpolation gets disabled (default:
``0.0001``). This is calculated as ``abs(disphz/vfps - 1) < threshold``,
where ``vfps`` is the speed-adjusted display FPS, and ``disphz`` the
display refresh rate.
The default is intended to almost always enable interpolation if the
playback rate is even slightly different from the display refresh rate.
But note that if you use e.g. ``--video-sync=display-vdrop``, small
deviations in the rate can disable interpolation and introduce a
discontinuity every other minute.
Set this to ``-1`` to disable this logic.
``dscale-radius``, ``cscale-radius``, ``tscale-radius``, etc.
Set filter parameters for ``dscale``, ``cscale`` and ``tscale``,