Add note about mpv invert

2 files changed, 153 insertions, 142 deletions

diff --git a/2022/organizers-notebook.md b/2022/organizers-notebook.md
index 5f0fa320..92811c81 100644
--- a/2022/organizers-notebook.md
+++ b/2022/organizers-notebook.md
@@ -4,55 +4,55 @@
 # Table of Contents
 
 -   [Current tasks / status](#current)
-    -   [Organizers: Review the submissions in the pad (see emacsconf-org-private or conf.org for the link) and add any objections or comments by Sept 26 for possible early speaker notification, Oct 7 for everything](#org879bbf9)
-    -   [zaeph: Write preparation instructions and decide on deadline for prerecs](#org6080063):zaeph:
-    -   [sacha: add more submissions (CFP deadline Sept 30)](#orga5c0621):sacha:
-    -   [sacha: copy things over from previous notebooks](#org97bc18c):sacha:
-    -   [corwin: Double-check sachac’s timezone conversions for availability](#org596a2a2):corwin:
-    -   [corwin: Investigate streaming options, maybe OBS in the cloud](#orgd50b89b):corwin:
-        -   [corwin: document such that someone else could use/fix it](#org0e5e4e8):corwin:
-        -   [corwin: recruit at least one more person to help operate the "video bouncer"](#org45b963d):corwin:
-    -   [corwn, zaeph: Work on the OBS scenes](#orgcaed5f7):zaeph:corwin:
-    -   [???: Figure out web-based file upload](#org4fa083d):needsowner:
-    -   [sacha: Prepare to export talk information to wiki](#org820284d):sacha:
-    -   [zaeph: Give access to emacsconf-2022-private to dto](#orgacf2fd0):zaeph:
-    -   [dto: create Org heading for scheduling caption team's live IRC duty shifts](#orgee73f8a):dto:
--   [Other tasks and processes](#org4763a67)
-    -   [Sacha: Organize volunteer information](#org83dba5d):sacha:
-    -   [Export talk information to wiki](#org5eb2ac7)
-        -   [${year}/info/${slug}-nav](#orgab8d187)
-        -   [${year}/info/${slug}-schedule](#orgd2cbdef)
-        -   [${year}/talks/${slug}](#org23ab8d6)
-    -   [Once talks are approved](#org14d7c57)
-    -   [As prerecorded talks come in](#org9b24a2a)
-        -   [Compress the video](#orge261eac)
-    -   [When a talk is captioned](#org5dfd0c3)
-    -   [Other tasks before the conference](#org69be21f)
-        -   [Test stream setup](#orgda1adae)
-        -   [Set up MPV for captions](#orgd814a98)
-            -   [mpv profile](#org057258e)
-            -   [Font: Clear Sans](#org5acad40)
+    -   [Organizers: Review the submissions in the pad (see emacsconf-org-private or conf.org for the link) and add any objections or comments by Sept 26 for possible early speaker notification, Oct 7 for everything](#org2623942)
+    -   [zaeph: Write preparation instructions and decide on deadline for prerecs](#orgcdfc17a):zaeph:
+    -   [sacha: add more submissions (CFP deadline Sept 30)](#org3b85dd6):sacha:
+    -   [sacha: copy things over from previous notebooks](#org073aba9):sacha:
+    -   [corwin: Double-check sachac’s timezone conversions for availability](#org8fc27b2):corwin:
+    -   [corwin: Investigate streaming options, maybe OBS in the cloud](#orgfc531a3):corwin:
+        -   [corwin: document such that someone else could use/fix it](#org02714b2):corwin:
+        -   [corwin: recruit at least one more person to help operate the "video bouncer"](#org934c024):corwin:
+    -   [corwn, zaeph: Work on the OBS scenes](#org029c04b):zaeph:corwin:
+    -   [???: Figure out web-based file upload](#org541c85e):needsowner:
+    -   [sacha: Prepare to export talk information to wiki](#orge623c8b):sacha:
+    -   [zaeph: Give access to emacsconf-2022-private to dto](#org8b3dbe5):zaeph:
+    -   [dto: create Org heading for scheduling caption team's live IRC duty shifts](#org8f9235b):dto:
+-   [Other tasks and processes](#org364dce8)
+    -   [Sacha: Organize volunteer information](#org850a3ab):sacha:
+    -   [Export talk information to wiki](#orga39b22c)
+        -   [${year}/info/${slug}-nav](#org5426368)
+        -   [${year}/info/${slug}-schedule](#org0be4713)
+        -   [${year}/talks/${slug}](#orgdeb897f)
+    -   [Once talks are approved](#org9942d08)
+    -   [As prerecorded talks come in](#org4651d02)
+        -   [Compress the video](#orgb498691)
+    -   [When a talk is captioned](#orgf253cc0)
+    -   [Other tasks before the conference](#org836f6e9)
+        -   [Test stream setup](#org81918ec)
+        -   [Set up MPV for captions](#orgba9a36f)
+            -   [mpv profile](#org238ff85)
+            -   [Font: Clear Sans](#org5646193)
         -   [Download prerecorded videos from ${protected}](#days-before)
-    -   [During the conference](#org3aa5c34)
+    -   [During the conference](#org1e97ca3)
         -   [Roles needed](#roles)
         -   [Set up](#setup)
             -   [Arrange screens](#screens)
             -   [Start streaming](#start-streaming):stream:
         -   [Check in a speaker](#check-in)
-            -   [bandali's check-in steps](#org7f36477)
+            -   [bandali's check-in steps](#orgddb1165)
         -   [Present talk](#present)
         -   [Publish information](#publish)
         -   [Handle Q&A](#questions)
         -   [During each talk](#each-talk)
         -   [Break time](#break)
         -   [End of stream](#end)
-    -   [After the conference](#orgaaaed33)
-        -   [Send thanks](#org91e9317)
-        -   [Update the wiki](#org527e99a)
-        -   [Update captions](#orgf76021a)
-        -   [Downsize the server](#orga7bc9c7):bandali:
+    -   [After the conference](#org7d641cc)
+        -   [Send thanks](#org52cd69c)
+        -   [Update the wiki](#org78fdc04)
+        -   [Update captions](#orge79dae2)
+        -   [Downsize the server](#orgc23f3e6):bandali:
     -   [In case of](#exceptions)
-        -   [Stuck wiki](#orga643847)
+        -   [Stuck wiki](#org33afc11)
         -   [Last-minute prerecording submission](#last-minute-prerec)
         -   [Last-minute caption update](#last-minute-captions)
         -   [Speaker has not checked in](#missing)
@@ -68,37 +68,38 @@
         -   [Technical issues during a live presentation](#live-issues)
         -   [Big technical issues with streaming](#stream-issues)
         -   [live0 can't handle the load or is close to network transfer limit](#network)
--   [Communications](#orgf7795c7)
-    -   [Ask emacsconf-org-private for feedback on early submissions](#org6fae2cc)
-    -   [Early speaker notification](#orge238d1f)
-        -   [Option A: Early speaker notification(?)](#org005ee71)
-        -   [Option B: Just letting them know it's been postponed](#org1d1e382)
-    -   [Future](#org143da11)
-        -   [Acceptance](#org1c30713)
-            -   [Code](#orgc5a2e17)
-            -   [Template](#orge070355)
-        -   [Acknowledge pre-rec submission](#org8015115)
-        -   [Captions for approval](#org714d48d)
-        -   [Speakers we haven't confirmed e-mail communications with](#org9e60273)
-        -   [Speakers who are missing prerecs](#orgd6759a6)
-            -   [Template](#org59d9235)
-        -   [Check-in instructions](#org7072a1a)
-            -   [Code](#org83c8003)
-            -   [E-mail for speakers who are planning to be at the conference](#orgfd3710c)
-            -   [E-mail for speakers who are not planning to be around, but who have sent us their prerecs](#orgf5926c9)
-        -   [Last email before the conference](#orge8027a3)
-        -   [Thank you, next steps](#org5df069b)
-            -   [Code](#org9eee4e1)
-            -   [Text](#org6d746e7)
-    -   [Archive](#org6b41d78)
-        -   [Second announcement: CFP](#org6434ded)
-        -   [First announcement: CFP](#orgda9ced1)
--   [Supporting code](#orgfecc16f)
-    -   [Publish this page](#org2c7582b)
-    -   [Tangle and publish on save](#org3a76dd3)
--   [Lessons learned](#org895c578)
-    -   [From previous years](#org2aa1069)
-    -   [Lessons learned for next year](#org56ef010)
+        -   [People have a hard time seeing dark-mode presentations (or light-mode)](#org2366c2c)
+-   [Communications](#orgcc82bff)
+    -   [Ask emacsconf-org-private for feedback on early submissions](#org7e9610d)
+    -   [Early speaker notification](#orgc53de65)
+        -   [Option A: Early speaker notification(?)](#org0541563)
+        -   [Option B: Just letting them know it's been postponed](#org8ddfc68)
+    -   [Future](#orgf734309)
+        -   [Acceptance](#org42bf130)
+            -   [Code](#orgd73dc75)
+            -   [Template](#org94c9f23)
+        -   [Acknowledge pre-rec submission](#org3a547c3)
+        -   [Captions for approval](#org7973c24)
+        -   [Speakers we haven't confirmed e-mail communications with](#org38ee109)
+        -   [Speakers who are missing prerecs](#orgc917c1a)
+            -   [Template](#orgef6dc93)
+        -   [Check-in instructions](#org2394e6c)
+            -   [Code](#org4945acd)
+            -   [E-mail for speakers who are planning to be at the conference](#org56d4039)
+            -   [E-mail for speakers who are not planning to be around, but who have sent us their prerecs](#org395985f)
+        -   [Last email before the conference](#org8357187)
+        -   [Thank you, next steps](#org6bac67a)
+            -   [Code](#org0fced3e)
+            -   [Text](#orgbfddf41)
+    -   [Archive](#org91b89a5)
+        -   [Second announcement: CFP](#org37a7831)
+        -   [First announcement: CFP](#orgece93a5)
+-   [Supporting code](#orged4f5df)
+    -   [Publish this page](#org57ecbfb)
+    -   [Tangle and publish on save](#org97290bc)
+-   [Lessons learned](#orgafecb84)
+    -   [From previous years](#org111165f)
+    -   [Lessons learned for next year](#org0565c80)
 
 
 <a id="current"></a>
@@ -198,14 +199,14 @@ Planned dates and phases:
 Current phase: No prerecs to process yet, so it's a good time to focus on infrastructure
 
 
-<a id="org879bbf9"></a>
+<a id="org2623942"></a>
 
-## TODO Organizers: Review the submissions in the pad (see emacsconf-org-private or conf.org for the link) and add any objections or comments by Sept 26 for possible [early speaker notification](#orge238d1f), Oct 7 for everything
+## TODO Organizers: Review the submissions in the pad (see emacsconf-org-private or conf.org for the link) and add any objections or comments by Sept 26 for possible [early speaker notification](#orgc53de65), Oct 7 for everything
 
 -   zaeph: will start reviewing on Sep 21
 
 
-<a id="org6080063"></a>
+<a id="orgcdfc17a"></a>
 
 ## TODO zaeph: Write preparation instructions and decide on deadline for prerecs     :zaeph:
 
@@ -219,24 +220,24 @@ We need time after the prerecs get submitted to:
 zaeph will also figure out the ffmpeg incantation for converting videos and the process for handling submitted prerecs
 
 
-<a id="orga5c0621"></a>
+<a id="org3b85dd6"></a>
 
 ## WAITING sacha: add more submissions (CFP deadline Sept 30)     :sacha:
 
 -   Sacha: Add submissions to emacsconf-2022-private, draft 2-day schedule by Oct 10
 
 
-<a id="org97bc18c"></a>
+<a id="org073aba9"></a>
 
 ## DONE sacha: copy things over from previous notebooks     :sacha:
 
 
-<a id="org596a2a2"></a>
+<a id="org8fc27b2"></a>
 
 ## TODO corwin: Double-check sachac’s timezone conversions for availability     :corwin:
 
 
-<a id="orgd50b89b"></a>
+<a id="orgfc531a3"></a>
 
 ## TODO corwin: Investigate streaming options, maybe OBS in the cloud     :corwin:
 
@@ -245,24 +246,24 @@ zaeph will also figure out the ffmpeg incantation for converting videos and the
     **\*** TODO corwin: plan an approach to use a centralized OBS/nginix "bouncer" :corwin:
 
 
-<a id="org0e5e4e8"></a>
+<a id="org02714b2"></a>
 
 ### TODO corwin: document such that someone else could use/fix it     :corwin:
 
 
-<a id="org45b963d"></a>
+<a id="org934c024"></a>
 
 ### TODO corwin: recruit at least one more person to help operate the "video bouncer"     :corwin:
 
 
-<a id="orgcaed5f7"></a>
+<a id="org029c04b"></a>
 
 ## TODO corwn, zaeph: Work on the OBS scenes     :zaeph:corwin:
 
 -   [ ] corwin is out from Nov 11-20, and we should start working on them before then.
 
 
-<a id="org4fa083d"></a>
+<a id="org541c85e"></a>
 
 ## TODO ???: Figure out web-based file upload     :needsowner:
 
@@ -270,43 +271,43 @@ Lesson learned from last year: "Since people kept running into ftp problems, we
 Maybe we could ask some of the volunteers who wanted to help us with the infra?  It shouldn’t be complicated to deploy a ready-made solution.
 
 
-<a id="org820284d"></a>
+<a id="orge623c8b"></a>
 
 ## DONE sacha: Prepare to export talk information to wiki     :sacha:
 
-[Export talk information to wiki](#org5eb2ac7)
+[Export talk information to wiki](#orga39b22c)
 
 Tested code in a fork, can publish talk information once talks are approved.
 
 
-<a id="orgacf2fd0"></a>
+<a id="org8b3dbe5"></a>
 
 ## DONE zaeph: Give access to emacsconf-2022-private to dto     :zaeph:
 
 
-<a id="orgee73f8a"></a>
+<a id="org8f9235b"></a>
 
 ## TODO dto: create Org heading for scheduling caption team's live IRC duty shifts     :dto:
 
 
-<a id="org4763a67"></a>
+<a id="org364dce8"></a>
 
 # Other tasks and processes
 
 
-<a id="org83dba5d"></a>
+<a id="org850a3ab"></a>
 
 ## DONE Sacha: Organize volunteer information     :sacha:
 
 
-<a id="org5eb2ac7"></a>
+<a id="orga39b22c"></a>
 
 ## Export talk information to wiki
 
-[sacha: Prepare to export talk information to wiki](#org820284d)
+[sacha: Prepare to export talk information to wiki](#orge623c8b)
 
 
-<a id="orgab8d187"></a>
+<a id="org5426368"></a>
 
 ### ${year}/info/${slug}-nav
 
@@ -319,14 +320,14 @@ Example:
     Next: <a href="/2021/talks/research">Managing a research workflow (bibliographies, note-taking, and arXiv)</a>  
 
 
-<a id="orgd2cbdef"></a>
+<a id="org0be4713"></a>
 
 ### ${year}/info/${slug}-schedule
 
 Automatically generated by emacsconf-create-info-pages
 
 
-<a id="org23ab8d6"></a>
+<a id="orgdeb897f"></a>
 
 ### ${year}/talks/${slug}
 
@@ -360,7 +361,7 @@ Initially generated by emacsconf-create-talk-pages
     [[!inline pages="internal(${year}/info/${slug}-nav)" raw="yes"]]
 
 
-<a id="org14d7c57"></a>
+<a id="org9942d08"></a>
 
 ## Once talks are approved
 
@@ -370,7 +371,7 @@ Initially generated by emacsconf-create-talk-pages
 -   Confirm e-mail communication with all of the speakers
 
 
-<a id="org9b24a2a"></a>
+<a id="org4651d02"></a>
 
 ## As prerecorded talks come in
 
@@ -381,7 +382,7 @@ Initially generated by emacsconf-create-talk-pages
 -   Make sure all the links/resources mentioned are written down somewhere (web page and enriched captions for pasting into #emacsconf-accessible)
 
 
-<a id="orge261eac"></a>
+<a id="orgb498691"></a>
 
 ### Compress the video
 
@@ -396,31 +397,31 @@ Usage: `compress-video.sh original-file output-file`:
 We tried using q56 before, but it was a little too aggressive. Q=32 is the default and is probably a reasonable space vs. quality compromise.
 
 
-<a id="org5dfd0c3"></a>
+<a id="orgf253cc0"></a>
 
 ## When a talk is captioned
 
 
-<a id="org69be21f"></a>
+<a id="org836f6e9"></a>
 
 ## Other tasks before the conference
 
 -   Coordinate volunteer schedules so all the roles are covered
 
 
-<a id="orgda1adae"></a>
+<a id="org81918ec"></a>
 
 ### Test stream setup
 
-[Stream](#orgc6d977f)
+[Stream](#org20398c8)
 
 
-<a id="orgd814a98"></a>
+<a id="orgba9a36f"></a>
 
 ### Set up MPV for captions
 
 
-<a id="org057258e"></a>
+<a id="org238ff85"></a>
 
 #### mpv profile
 
@@ -455,7 +456,7 @@ Add the following profile to `~/.config/mpv/mpv.conf`:
 (Thanks, zaeph)
 
 
-<a id="org5acad40"></a>
+<a id="org5646193"></a>
 
 #### Font: Clear Sans
 
@@ -474,7 +475,7 @@ Links:
         rsync -avzue ssh front:/var/www/media.emacsconf.org/2021/protected/*--main.webm .
 
 
-<a id="org3aa5c34"></a>
+<a id="org1e97ca3"></a>
 
 ## During the conference
 
@@ -652,7 +653,7 @@ Exception: [CHECK is unavailable](#check-gone)
         information.
 
 
-<a id="org7f36477"></a>
+<a id="orgddb1165"></a>
 
 #### bandali's check-in steps
 
@@ -797,24 +798,24 @@ Exceptions:
 -   bandali figures out the downstream
 
 
-<a id="orgaaaed33"></a>
+<a id="org7d641cc"></a>
 
 ## After the conference
 
 
-<a id="org91e9317"></a>
+<a id="org52cd69c"></a>
 
 ### Send thanks
 
-[Thank you, next steps](#org5df069b)
+[Thank you, next steps](#org6bac67a)
 
 
-<a id="org527e99a"></a>
+<a id="org78fdc04"></a>
 
 ### Update the wiki
 
 
-<a id="orgf76021a"></a>
+<a id="orge79dae2"></a>
 
 ### Update captions
 
@@ -840,7 +841,7 @@ Exceptions:
 -   Update ${conf-year}/${captions}/${slug}.md in the wiki. To make this from scratch, use `M-x conf-prepare-transcript-directives` from the talk heading in the conference Org file.
 
 
-<a id="orga7bc9c7"></a>
+<a id="orgc23f3e6"></a>
 
 ### BLOCKED Downsize the server     :bandali:
 
@@ -850,7 +851,7 @@ Exceptions:
 ## In case of
 
 
-<a id="orga643847"></a>
+<a id="org33afc11"></a>
 
 ### Stuck wiki
 
@@ -1037,12 +1038,19 @@ sudo -iu ikiwiki &#x2013; ikiwiki &#x2013;setup ~ikiwiki/emacsconf.setup
     -   Add additional node to Linode account for shared transfer pool (TODO: doublecheck)
 
 
-<a id="orgf7795c7"></a>
+<a id="org2366c2c"></a>
+
+### People have a hard time seeing dark-mode presentations (or light-mode)
+
+mpv &#x2013;vf=negate $url
+
+
+<a id="orgcc82bff"></a>
 
 # Communications
 
 
-<a id="org6fae2cc"></a>
+<a id="org7e9610d"></a>
 
 ## DONE Ask emacsconf-org-private for feedback on early submissions
 
@@ -1067,16 +1075,16 @@ Thanks!
 Sacha
 
 
-<a id="orge238d1f"></a>
+<a id="orgc53de65"></a>
 
 ## TODO Early speaker notification
 
 We can accept early or send people a note saying notification of acceptance will be on Oct 15, because of the extended CFP.
 
 
-<a id="org005ee71"></a>
+<a id="org0541563"></a>
 
-### TODO Option A: Early speaker notification(?)
+### Option A: Early speaker notification(?)
 
 Hi, $name!
 
@@ -1115,9 +1123,9 @@ Thank you so much!
 Sacha
 
 
-<a id="org1d1e382"></a>
+<a id="org8ddfc68"></a>
 
-### TODO Option B: Just letting them know it's been postponed
+### Option B: Just letting them know it's been postponed
 
 Hi, $name!
 
@@ -1128,17 +1136,17 @@ for your patience!
 Sacha
 
 
-<a id="org143da11"></a>
+<a id="orgf734309"></a>
 
 ## Future
 
 
-<a id="org1c30713"></a>
+<a id="org42bf130"></a>
 
 ### Acceptance
 
 
-<a id="orgc5a2e17"></a>
+<a id="orgd73dc75"></a>
 
 #### Code
 
@@ -1196,7 +1204,7 @@ Sacha
         (save-excursion (conf-replace-plist-in-string attrs (plist-get attrs :body)))))
 
 
-<a id="orge070355"></a>
+<a id="org94c9f23"></a>
 
 #### Template
 
@@ -1227,7 +1235,7 @@ EmacsConf organization team
 P.S. Please keep emacsconf-submit@gnu.org in To or Cc when replying.
 
 
-<a id="org8015115"></a>
+<a id="org3a547c3"></a>
 
 ### Acknowledge pre-rec submission
 
@@ -1260,7 +1268,7 @@ P.S. Please keep emacsconf-submit@gnu.org in To or Cc when replying.
     "Thank you so much for all the work you put into preparing a talk for EmacsConf ${year}, and thank you for submitting the prerecorded video before the conference!\n\nSacha"))))
 
 
-<a id="org714d48d"></a>
+<a id="org7973c24"></a>
 
 ### Captions for approval
 
@@ -1277,7 +1285,7 @@ ${url} . Thanks again for your contribution!
 Sacha
 
 
-<a id="org9e60273"></a>
+<a id="org38ee109"></a>
 
 ### Speakers we haven't confirmed e-mail communications with
 
@@ -1322,7 +1330,7 @@ Sacha Chua
 (Please use Reply to All to keep emacsconf-submit@gnu.org in the loop. Thanks!)
 
 
-<a id="orgd6759a6"></a>
+<a id="orgc917c1a"></a>
 
 ### Speakers who are missing prerecs
 
@@ -1343,7 +1351,7 @@ Sacha Chua
                                          (conf-get-talk-info))))))
 
 
-<a id="org59d9235"></a>
+<a id="orgef6dc93"></a>
 
 #### Template
 
@@ -1399,7 +1407,7 @@ stream for you. Hope to hear from you soon!
 Sacha
 
 
-<a id="org7072a1a"></a>
+<a id="org2394e6c"></a>
 
 ### Check-in instructions
 
@@ -1417,7 +1425,7 @@ Goals:
             -   They’re joined by the streamer and host.
 
 
-<a id="org83c8003"></a>
+<a id="org4945acd"></a>
 
 #### Code
 
@@ -1474,7 +1482,7 @@ Slightly more complex because of the conditionals
             (buffer-list)))
 
 
-<a id="orgfd3710c"></a>
+<a id="org56d4039"></a>
 
 #### E-mail for speakers who are planning to be at the conference
 
@@ -1502,7 +1510,7 @@ Looking forward to seeing you soon!
 Sacha
 
 
-<a id="orgf5926c9"></a>
+<a id="org395985f"></a>
 
 #### E-mail for speakers who are not planning to be around, but who have sent us their prerecs
 
@@ -1524,7 +1532,7 @@ Thank you again for being part of EmacsConf ${year}!
 Sacha
 
 
-<a id="orge8027a3"></a>
+<a id="org8357187"></a>
 
 ### Last email before the conference
 
@@ -1543,12 +1551,12 @@ Sacha
 > also be the time at which the talk will be made available on the same page.
 
 
-<a id="org5df069b"></a>
+<a id="org6bac67a"></a>
 
 ### Thank you, next steps
 
 
-<a id="org9eee4e1"></a>
+<a id="org0fced3e"></a>
 
 #### Code
 
@@ -1580,7 +1588,7 @@ Sacha
              (plist-get template :body)))))))
 
 
-<a id="org6d746e7"></a>
+<a id="orgbfddf41"></a>
 
 #### Text
 
@@ -1610,12 +1618,12 @@ Thanks again for speaking at EmacsConf!
 Sacha
 
 
-<a id="org6b41d78"></a>
+<a id="org91b89a5"></a>
 
 ## Archive
 
 
-<a id="org6434ded"></a>
+<a id="org37a7831"></a>
 
 ### DONE Second announcement: CFP
 
@@ -1646,7 +1654,7 @@ emacsconf-discuss list, so as to help avoid generating extra off-topic
 chatter in the other lists cc'd on this message.  Thank you.
 
 
-<a id="orgda9ced1"></a>
+<a id="orgece93a5"></a>
 
 ### DONE First announcement: CFP
 
@@ -1676,12 +1684,12 @@ emacsconf-discuss list, so as to help avoid generating extra off-topic
 chatter in the other lists Cc'd on this message.  Thank you.
 
 
-<a id="orgfecc16f"></a>
+<a id="orged4f5df"></a>
 
 # Supporting code
 
 
-<a id="org2c7582b"></a>
+<a id="org57ecbfb"></a>
 
 ## Publish this page
 
@@ -1694,7 +1702,7 @@ chatter in the other lists Cc'd on this message.  Thank you.
       (call-interactively #'magit-push-current-to-pushremote))
 
 
-<a id="org3a76dd3"></a>
+<a id="org97290bc"></a>
 
 ## Tangle and publish on save
 
@@ -1721,12 +1729,12 @@ chatter in the other lists Cc'd on this message.  Thank you.
       (message "Hook is no longer active"))
 
 
-<a id="org895c578"></a>
+<a id="orgafecb84"></a>
 
 # Lessons learned
 
 
-<a id="org2aa1069"></a>
+<a id="org111165f"></a>
 
 ## From previous years
 
@@ -1758,7 +1766,7 @@ chatter in the other lists Cc'd on this message.  Thank you.
 -   [ ] we can see if bot + pads + merging will help next year, and we can also experiment with multiple streams if there are enough people to pull it off so that speakers don't feel like they've just been dropped in a room and left to their own devices :)
 
 
-<a id="org56ef010"></a>
+<a id="org0565c80"></a>
 
 ## Lessons learned for next year
 
diff --git a/2022/organizers-notebook.org b/2022/organizers-notebook.org
index 302d6698..893dda55 100644
--- a/2022/organizers-notebook.org
+++ b/2022/organizers-notebook.org
@@ -714,7 +714,6 @@ Exceptions:
   - Toobnix
   - Peertube
 - STREAM e-mails the mailing list
-  
 *** live0 can't handle the load or is close to network transfer limit
 :PROPERTIES:
 :CUSTOM_ID: network
@@ -727,6 +726,10 @@ Exceptions:
   - Consider dropping the restream to Toobnix (lower audience?) or to Youtube
   - Add additional node to Linode account for shared transfer pool (TODO: doublecheck)
 
+*** People have a hard time seeing dark-mode presentations (or light-mode)
+
+mpv --vf=negate $url
+
 * Communications
 ** DONE Ask emacsconf-org-private for feedback on early submissions