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Diffstat (limited to '2021/prepare.md')
| -rw-r--r-- | 2021/prepare.md | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/2021/prepare.md b/2021/prepare.md index 4cadc5cf..3d78a407 100644 --- a/2021/prepare.md +++ b/2021/prepare.md @@ -38,8 +38,7 @@ your name, please start your video with something along the lines of: "Hi! I'm ${NAME} and I'll be talking about ${TOPIC}." -Please **upload your prerecording(s) via FTP** to the FTP server -we are setting up with the following details: +Please **upload your prerecording(s) (and script/notes if any) via FTP** to the FTP server we have set up with the following details: - host: ftp-upload.emacsconf.org - username: anonymous @@ -101,9 +100,26 @@ WebM format if possible.* > format. The closer to this format submitted video files arrive in, > the easier it will be to process and upload them. -After you send in your video, if you've indicated that you'd like to -do live Q&A, we'll set up a tech-check call with you. We'll post -details here closer to that time. +# Compression + +If you would like to compress your video before uploading, the following shell script may be useful: + + Q=56 + 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" + +If you put it in a file called `compress-video.sh`, you can execute it +from the command line with something like `sh compress-video.sh +input-file.webm output-file.webm`. It will compress the file in two +passes. During the first pass, the frame count will increase, but the +speed will be 0. After the first pass, it will display proper progress +information. + +# Tech check + +If you're planning to do live Q&A, you can check your system setup at +https://test.bigbluebutton.org/ . We'll set up a tech-check call with +you, too. We'll post details here closer to that time. Thank you so much for helping with EmacsConf 2021! @@ -157,6 +173,17 @@ up the talk wiki pages. That way, you can see what else is going on in the conference and maybe coordinate with other speakers in order to minimize overlap and maximize awesomeness. +## What if there are lots of great questions during Q&A and we run out of time? + +You can continue answering questions on the collaborative pad or IRC, +and we'll copy questions and answers onto the wiki page +afterwards. You can also answer questions on the wiki page even after the event. + +An extended live demo or Q&A session might be possible if someone +volunteers to broadcast it on an alternative stream. If you or a +volunteer is interested in helping with this, please feel free to +contact us at <emacsconf-submit@gnu.org>. + ## More questions? Please email <emacsconf-submit@gnu.org>. We'd love to hear from you. |