From fc25c3b0764cbb1917f5989ee37a845a03099e59 Mon Sep 17 00:00:00 2001
From: Sacha Chua <sacha@sachachua.com>
Date: Fri, 17 Dec 2021 16:54:21 -0500
Subject: update playbook with q=32

---
 playbook.org | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

(limited to 'playbook.org')

diff --git a/playbook.org b/playbook.org
index db03fac4..d47dc9e1 100644
--- a/playbook.org
+++ b/playbook.org
@@ -18,18 +18,19 @@
 | HOST  | hosting, streaming, intros, reading, moving questions/answers around | zaeph   |
 
 | ${protected}     | [[/ssh:front:/var/www/media.emacsconf.org/2021/protected/]] |
-| ${stream-status} | [[/ssh:front:/var/www/live.emacsconf.org/index.html]] |
+| ${stream-status} | [[/ssh:front:/var/www/live.emacsconf.org/index.html]]       |
 | ${upcoming}      | upcoming.org shared over CRDT                           |
 | ${conf}          | conf.org shared over CRDT                               |
 | ${playbook}      | playbook.org shared over CRDT                           |
 | ${dump}          | [[/ssh:live:/data/]]                                        |
 | ${media}         | [[/ssh:front:/var/www/media.emacsconf.org/2021/]]           |
-| ${live-main} |  [[/ssh:front:/var/www/live.emacsconf.org/main.html]] | 
-| ${live-480p} |  [[/ssh:front:/var/www/live.emacsconf.org/main-480p.html]] | 
-| ${live-index} |  [[/ssh:front:/var/www/live.emacsconf.org/index.html]] | 
-| ${live-alt}  |  [[/ssh:front:/var/www/live.emacsconf.org/alt.html]]  | 
-| ${profile} |  [[/ssh:live:~/.profile]] | 
-
+| ${live-main}     | [[/ssh:front:/var/www/live.emacsconf.org/main.html]]        |
+| ${live-480p}     | [[/ssh:front:/var/www/live.emacsconf.org/main-480p.html]]   |
+| ${live-index}    | [[/ssh:front:/var/www/live.emacsconf.org/index.html]]       |
+| ${live-alt}      | [[/ssh:front:/var/www/live.emacsconf.org/alt.html]]         |
+| ${profile}       | [[/ssh:live:~/.profile]]                                    |
+| ${emacsconf-el}  | https://git.emacsconf.org/emacsconf-el/                 |
+|                  |                                                         |
 * After the conference
 ** Update captions
 
@@ -54,6 +55,9 @@
 - Update Toobnix and Youtube captions with =conf-video-share=.
 - Update Toobnix and Youtube descriptions with chapters.
 - 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.
+** Update
+
+
 
 * Thursday or Friday before the conference
 :PROPERTIES:
@@ -540,8 +544,22 @@ redirect the mpv output to the mpv sink.
 pacmd list-sink-inputs  # notice the ID for the process you want to redirect
 pacmd move-sink-input 1 mpv
 #+end_src
-** Check for video encoding issues
+** Compress video
+
+Usage: =compress-video.sh original-file output-file=:
 
-Sometimes the compression may get cut off.
+#+begin_src sh :eval no :tangle compress-video.sh
+Q=32
+ffmpeg -y -i "$1" -c:v libvpx-vp9 -b:v 0 -crf $Q -aq-mode 2 -an -tile-columns 0 -tile-rows 0 -frame-parallel 0 -cpu-used 8 -auto-alt-ref 1 -lag-in-frames 25 -g 240 -pass 1 -f webm -threads 8 /dev/null &&
+ffmpeg -y -i "$1" -c:v libvpx-vp9 -b:v 0 -crf $Q -c:a copy -tile-columns 2 -tile-rows 2 -frame-parallel 0 -cpu-used -5 -auto-alt-ref 1 -lag-in-frames 25 -pass 2 -g 240 -threads 8 "$2"
+#+end_src
+
+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.
+
+** Check for video encoding issues
 
+Sometimes the compression may get cut off. You can use
+=compile-media-verify-video-frames= from
+https://github.com/sachac/compile-media to check that videos have
+enough frames for their expected duration
 
-- 
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