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From: Juliusz Chroboczek <jch@irif.fr>
To: eric_G <junk.eg@free.fr>
Cc: galene@lists.galene.org
Subject: [Galene] Re: -udp-range question.
Date: Mon, 06 Sep 2021 19:41:57 +0200
Message-ID: <87tuixtxcq.wl-jch@irif.fr> (raw)
In-Reply-To: <94A7C6EB-97BF-444B-AC70-25835A8A07D1@free.fr>

> * Video recordings are divided into small chucks of webm video of approx 20-60
>   seconds, some with different pixel aspect ratios.

Yes, we start a new video whenever the dimension changes.  On an
uncongested network, there should be a 10 second low-resolution segment,
and then the resolution stabilises at the highest value.  This was already
the case in 0.3, but we were losing the low-resolution segment (the
recording was only started at the second keyframe).

The alternative would be to use a single webm file even though the
resolution changes.  This happens to work fine with mpv and vlc, but is
a violation of the Matroška format.

> * In Firefox (78.13), Simulcast refuses to be activated (on) and turns to off.
>   (auto is OK)

Firefox uses a non-standard protocol for simulcast.  I've tried to
implement it (Sean has recently added support to Pion), but it doesn't
work with the version of Firefox currently in Debian, and I don't see
a good way to distinguish the good versions from the bad ones.

> * In the op/presenter video window the bitrate is now only numbers (without its
>   unit of measurement)

Noted, thanks.

> Playing, as op/presenter, video streaming (Play local file) from a mp4  (using
> MacOS 10.11.6)
> 
> * Chromium (95.0.4635.0): not working (black screen)

Known issue, https://bugs.chromium.org/p/chromium/issues/detail?id=1156408

> * Chrome (93.0.4577.63) OK (the op/presenter gets the sound)

Strange.  Can you please compare the output of about:gpu in the two
versions of Chrome/Chromium?

> * Firefox (78.13.0) working but with no sound for the op/presenter.

Thanks, I'll have a look.

> * Safari (11.1.2): `Play local file` option is not available.

The API is not supported:

  https://caniuse.com/mdn-api_htmlmediaelement_capturestream

-- Juliusz



  reply	other threads:[~2021-09-06 17:42 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-05 16:46 [Galene] ANNOUNCE: Galene 0.4 Juliusz Chroboczek
2021-09-05 17:48 ` [Galene] -udp-range question eric_G
2021-09-05 18:38   ` [Galene] " Juliusz Chroboczek
2021-09-06 13:12     ` eric_G
2021-09-06 17:41       ` Juliusz Chroboczek [this message]
2021-09-06 17:53         ` eric_G
2021-09-06 18:33           ` Juliusz Chroboczek
2021-09-07  8:59             ` [Galene] Idea for a new feature Fabrice Rouillier
2021-09-05 18:03 ` [Galene] Re: ANNOUNCE: Galene 0.4 Michael Ströder
2021-09-05 18:39   ` Juliusz Chroboczek
2021-09-05 18:47   ` Juliusz Chroboczek
2021-09-05 20:31     ` Michael Ströder
2021-09-05 19:00   ` Juliusz Chroboczek
2021-09-05 20:33     ` Michael Ströder
     [not found] ` <3B4A029C-7944-43F7-B0D9-F2184FCD4B52@free.fr>
2021-09-10 13:43   ` [Galene] Re: -udp-range question eric_G
2021-09-10 16:30     ` Juliusz Chroboczek

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