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Re: fmpeg drift (2) - solved?

From Lawrence D’Oliveiro <ldo@nz.invalid>
Newsgroups comp.os.linux.misc
Subject Re: fmpeg drift (2) - solved?
Date 2025-11-17 02:39 +0000
Organization A noiseless patient Spider
Message-ID <10fe1sh$ipc8$2@dont-email.me> (permalink)
References (11 earlier) <codec-20251116142803@ram.dialup.fu-berlin.de> <p43pulxqdv.ln2@Telcontar.valinor> <6d1qulxl09.ln2@Telcontar.valinor> <10fdre8$hc8b$2@dont-email.me> <96dqulx1g.ln2@Telcontar.valinor>

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On Mon, 17 Nov 2025 03:17:13 +0100, Carlos E.R. wrote:

> I heard mentioned some study that said that, that 4K is beyond human
> appreciation.

The resolution of your eyes is measured in units of angle, not
distance. The resolution can be colour-dependent, but a good rule of
thumb is around one minute of arc per pixel -- i.e. 60 pixels per
degree of arc.

So at a viewing distance of 3m for a 3840×2160-resolution image, the
optimum screen diagonal is about 270cm (a bit over 100”). If your set
is much smaller than this, then it should be closer, otherwise you’re
not seeing everything.

I wrote a script some years ago
<https://bitbucket.org/ldo17/screencalc/> which, given some suitable
subset of the parameters regarding screen size, pixel density, viewing
distance etc, will attempt to work out the rest.

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Thread

My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-12 23:20 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-12 23:51 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 11:01 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:05 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 08:29 -0500
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:46 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 11:35 -0500
  Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 14:56 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:54 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 23:14 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:03 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 22:23 +0100
          Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-15 07:25 +1000
            Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-14 22:58 +0100
              Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 22:12 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-15 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 23:27 +0000
                fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:29 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:39 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:00 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:03 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:25 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 12:48 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 01:00 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 07:22 +0100
                fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:34 +0100
                Re: fmpeg drift (2) ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 13:34 +0000
                Re: fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:19 +0100
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:56 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 00:49 +0000
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 03:17 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 02:39 +0000
                Re: fmpeg drift (2) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:21 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-15 09:50 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:09 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:32 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:01 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:09 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 22:41 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 22:45 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-16 11:32 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:26 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:35 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:37 +0000
            Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:33 +0000
              Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-16 07:31 +1000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:08 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-17 07:00 +1000
  Re: My 2 favorite tools for reading Linux manual pages the easy way candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-11-13 18:50 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 19:20 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-13 23:32 +0000

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