From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: mail.toke.dk; spf=pass (mailfrom) smtp.mailfrom=irif.fr (client-ip=2001:660:3301:8000::1:2; helo=korolev.univ-paris7.fr; envelope-from=jch@irif.fr; receiver=) Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) by mail.toke.dk (Postfix) with ESMTPS id 2608D9076EB for ; Wed, 29 Dec 2021 19:18:59 +0100 (CET) Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/82085) with ESMTP id 1BTIIv1c007190; Wed, 29 Dec 2021 19:18:57 +0100 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id E90E0B8F7D; Wed, 29 Dec 2021 19:18:57 +0100 (CET) X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id 9AzC95-XN910; Wed, 29 Dec 2021 19:18:56 +0100 (CET) Received: from pirx.irif.fr (82-64-141-196.subs.proxad.net [82.64.141.196]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 839F0B8F7A; Wed, 29 Dec 2021 19:18:56 +0100 (CET) Date: Wed, 29 Dec 2021 19:18:56 +0100 Message-ID: <87ee5vl1f3.wl-jch@irif.fr> From: Juliusz Chroboczek To: err404@free.fr In-Reply-To: <250d8537-8742-1e65-ce54-66ffead13256@free.fr> References: <250d8537-8742-1e65-ce54-66ffead13256@free.fr> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.1 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [194.254.61.138]); Wed, 29 Dec 2021 19:18:58 +0100 (CET) X-Miltered: at korolev with ID 61CCA691.002 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 61CCA691.002 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 61CCA691.002 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham Message-ID-Hash: 45Z4XPUCC3UGVAX7QLXAGGKD72J2CLYK X-Message-ID-Hash: 45Z4XPUCC3UGVAX7QLXAGGKD72J2CLYK X-MailFrom: jch@irif.fr X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: galene@lists.galene.org X-Mailman-Version: 3.3.5 Precedence: list Subject: [Galene] Re: poor screen sharing quality on galene (vp9) when the cpu is not strong enough. List-Id: =?utf-8?q?Gal=C3=A8ne_videoconferencing_server_discussion_list?= Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: > the video stream quality was good but when I tried to share my screen, > the screen sharing quality was uggly, really... even on a not moving > screen (displaying static text). [...] > I tried the same on another computer (better cpu, better graphic card), > the quality was better on screen sharing > it is appear that every second (or two), the quality drop again to > ugly. (seem the stream was lost and restarted) Interesting. The periodic drop in quality indicates that somebody is requesting a new keyframe every two seconds. This may happen if either the browser or the server believes that the stream is broken. I'll see if I can reproduce the issue. Was that over WiFi? Did the statistics interface indicate large numbers of lost packets? What happens when you disable simulcast on the sender side? What happens if you set the sender's video quality to "low"? What happens if you set the sender's video quality to "unlimited"? > I though that sharing a static screen was easier than streaming a 720p > webcam :p The reolution of the webcam is chosen by the browser, it's most probably lower than 720p (probably 640x400). You may manually toggle the resolution by doing /set resolution [1024,768] then restarting the video stream. (This is deliberately undocumented, until I find a good UI. Unfortunately, the JavaScript API does not allow me to find out the webcams native resolution, so it's tricky.) -- Juliusz