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diff --git a/captioning.md b/captioning.md new file mode 100644 index 00000000..8c3d86bb --- /dev/null +++ b/captioning.md @@ -0,0 +1,64 @@ +[[!meta title="Captioning tips"]] +[[!meta copyright="Copyright © 2021 Sacha Chua"]] + +Captions are great for making videos (especially technical ones!) +easier to understand and search. + +If you see a talk at https://media.emacsconf.org/2021/protected/ that +you'd like to caption, feel free to download it and start working on +it with your favourite subtitle editor. Let me know what you pick by +e-mailing me at <sacha@sachachua.com> so that I can update the index +and try to avoid duplication of work. + +We've been using <https://github.com/rndusr/subed> to caption things +as VTT or SRT in Emacs, often starting with autogenerated captions +from YouTube (the .vtt or .srt file), but you're welcome to make +captions using your favourite tool. + +Please keep captions to one line each so that they can be displayed +without wrapping, as we plan to broadcast by resizing the video and +displaying open captions below. Maybe 50 characters max? Since the +captions are also displayed as text on the talk pages, you can omit +filler words. We've also been trying to break captions at reasonable +points (ex: phrases). + +For example, instead of: + +- so i'm going to talk today about a +- fun rewrite i did of uh of the bindat +- package + +I would probably edit it to be more like: + +- So I'm going to talk today +- about a fun rewrite I did +- of the bindat package. + +If you use subed.el, you can use: + +- `C-c C-v` to load the video +- `M-SPC` to toggle pause/play +- `M-j` to jump to the current subtitle +- `M-.` to split the subtitle at the current playing position (or a reasonable guess) +- `M-m` to merge with previous +- `M-M` to merge with next +- `C-c [` to set the start time to the playing position +- `C-c ]` to set the stop time to the playing position. + +If you want to take advantage of the autogenerated captions and the +word-level timing data from YouTube, you can start with the VTT file +for the video you want, then use `my-caption-load-word-data` from +<https://sachachua.com/dotemacs/#word-level> to load the srv2 file +(also attached), and then use `my-caption-split` to split using the +word timing data if possible. You can bind this to a keystroke with +something like `M-x local-set-key M-' my-caption-split`. + +We'll be posting VTT files so that they can be included by the HTML5 video +player (demo: https://emacsconf.org/2021/talks/news/), so if you use a +different tool that produces another format, any format that can be +converted into that one (like SRT or ASS) is fine. You can e-mail me the +subtitles when you're done, and then I can merge it into the video. + +Please let me know if you need any help! + +Sacha <sacha@sachachua.com> |