From f1436658647aceb7ea58e595439fa6dd5c2cdb97 Mon Sep 17 00:00:00 2001 From: wm4 Date: Thu, 15 Sep 2016 10:11:44 +0200 Subject: manpage: explain "speed-adjusted" FPS for --interpolation-threshold Fixes #3528. --- DOCS/man/options.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 7c3ff0808c..0a6e979eb0 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -3915,8 +3915,11 @@ The following video options are currently all specific to ``--vo=opengl`` and ``--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. + where ``vfps`` is the speed-adjusted video FPS, and ``disphz`` the + display refresh rate. (The speed-adjusted video FPS is roughly equal to + the normal video FPS, but with slowdown and speedup applied. This matters + if you use ``--video-sync=display-resample`` to make video run synchronously + to the display FPS, or if you change the ``speed`` property.) The default is intended to almost always enable interpolation if the playback rate is even slightly different from the display refresh rate. But -- cgit v1.2.3