Great write-up of the wonderful work by the amazing folks at the Digital Harbor Foundation. So happy just to know them!

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IndieWeb: The Book
For a quite a while I’ve been thinking about writing a book about the IndieWeb to provide a broader overview of what it is philosophically, how it works, how its community functions, and most specifically how the average person can more easily become a part of it. Back in January Timo Reitnauer wrote Let’s Make 2017 The Year of the Indie...

📕 Finished reading The Delirium Brief by Charles Stross.

I love the Laundry series, and I love the way everything is leveling up. Gaaah!

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HWC Baltimore 2017-10-18 Wrap-Up

Baltimore's second October 2017 meetup for Homebrew Website Club met at the Digital Harbor Foundation Tech Center on October 4th.

Below are notes from the "broadcast" portion of the meetup. — Recently posted about his IWC NYC hack day project - showing subtitle and caption tracks for audio files in the browser by marking them up as a video element. Showed off his new personal site, a note-taking and planning site with an audience of one. It lives on his laptop and on a protected Tor hidden service so it can be read from his phone. Also been working on porting his podcast website to Hugo, learning how fragile his micropub server is about mapping URLs to flat files on the server. — Started a new job recently, so been working to find time to work on his new site. Wrote an outline and a list of resources about what the site will be about and what content will be on it. Hoping to publish in the next two weeks! — Our venue host for the evening! Been writing a lot of stuff and working to organize it. Outlining story points for a narrative piece, consists of lots of dream pieces, which she has been logging for a few years. Been organizing those in Google Keep, cataloging and tagging them by time. Found it really interesting to look over her dream notes for this time past year. Also finding searching incredibly useful. "When did I dream about a horse? There are two dreams!" — Has a set of projects she wants to finish before updating her website. One of them is a podcast that will require lots of collaborative elements, so been planning that. — Has been on the job search and realized he needed a website. It's currently a programming demo of a CAD app that uses Paper.js and supports boolean operations over primitives.

Other things:

  • We talked about aligning audio/video content and content in a web page, like this course on O'Reilly. Would be useful for DHF's learning system courses. Could also be fun to have This Week in the IndieWeb Audio Edition show previews of the pages being discussed as they are being discussed.
  • We discussed capturing notes with the lowest friction tools then moving them into more useful/durable systems later.
  • We talked about podcasting tools. Dedicated recorders for in-the-field recording, Audacity for editing.
  • We talked about the recent announcement from Adafruit's founder/owner/engineer ladyada finding herself locked out of her Facebook account with no apparently recourse. This led to general discussion of silos and monopolies, systems that are secretly bad for you because they stalk you or share you or your contacts' data, systems that are directly bad for you like Candy Crush and other addictive apps.
  • Talked about some decentralized systems, like MaidSafe (decentralized p2p filestore, incentivized w/ a cryptocurrency), and Beaker's new decentralized Twitter-alike Rotonde (decentralized p2p websites, host it yourself or pay someone to mirror).


Thanks to everybody who came out! We look forward to seeing you at the Digital Harbor Foundation Tech Center for the next one! Look for the announcement soon!

Photo for tonight’s HWC Baltimore

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Theme Change on My Site
It’s time for a change on my site. I’ve been working on a fork of the WordPress Twenty-Sixteen theme that is customized for the plugins I use. This theme is going to continue to develop and be customized, but it is now, at the least, nice enough for me to use it. What do you think so far?

I like it so far!

“Boost your post.” “Publish a post.”

Facebook, you sound desperate and pushy.

Native HTML5 captions and titles for audio content with WebVTT

This is a write-up of my Sunday hack day project from IndieWebCamp NYC 2017!
You can see my portion of the IWC NYC demos here.

Prelude: Videos for audio content

Feel free to skip this intro if you are just here for the HTML how-to!

I've been doing a short ~10 minute podcast about the IndieWeb community since February, an audio edition of the This Week in the IndieWeb weekly newsletter cleverly titled This Week in the IndieWeb Audio Edition.

After the 2017 IndieWeb Summit, each episode of the podcast also featured a brief ~1 minute interview with one of the participants there. As a way of highlighting these interviews outside the podcast itself, I became interested in the idea of "audiograms" – videos that are primarily audio content for sharing on platforms like Twitter and Facebook. I wrote up my first steps into audiograms using WNYC's audiogram generator.

While these audiograms were able to show visually interesting dynamic elements like waveforms or graphic equalizer data, I thought it would be more interesting to include subtitles from the interviews in the videos. I learned that Facebook supports captions in a common format called SRT. However, Twitter's video offerings have no support for captions.

Thankfully, I discovered the BBC's open source fork of audiogram, which supports subtitles and captioning, including the ability to "bake in" subtitles by encoding the words directly into the video frames. It also relies heavily on BBC web infrastructure, and required quite a bit of hacking up to work with what I had available.

The BBC Audiogram captioning interface.

In the end, my process looked like this:

  • Export the audio of the ~1 minute interview to an mp3.
  • Type up a text transcript of the audio. Using VLC's playback controls and turning the speed down to 0.33 made this pretty easy.
  • Use a "forced alignment" tool called gentle to create a big JSON data file containing all the utterances and their timestamps.
  • Use the jq command line tool to munge that JSON data into a format that my hacked-up version of the BBC audiogram generator can understand.
  • Use the BBC audiogram generator to edit the timings and word groupings for the subtitles and generate the final video.
  • Bonus: the BBC audiogram generator can output subtitles in SRT format - but if I've already "baked them in" this feels redundant.

You can see an early example here. I liked these posts and found them easy to post to my site as well as Facebook, Twitter, Mastodon, etc. Over time I evolved them a bit to include more info about the interviewee. Here's a later example.

One thing that has stuck with me is the idea that Facebook could be displaying these subtitles, if only I was exporting them in the SRT format. Additionally, I had done some research into subtitles for HTML5 video with WebVTT and the <track> element and wondered if it could work for audio content with some "tricks".

TL;DR - Browsers will show captions for audio if you pretend it is a video

Let's skip to the end and see what we're talking about. I wanted to make a version of my podcast where the entire ~10 minutes could be listened to along with timed subtitles, without creating a 10-minute long video. And I did!

Here is a sample from my example post of an audio track inside an HTML5 <video> element with a subtitle track. You will probably have to click the "CC" button to enable the captioning

How does it work? Well, browsers aren't actually too picky about the data types of the <source> elements inside. You can absolutely give them an audio source.

Add in a poster attribute to the <video> element, and you can give the appearance of a "real" video.

And finally, add in the <source> element with your subtitle track and you are good to go.

The relevant source for my example post looks something like this:

<video controls poster="poster.png" crossorigin="anonymous" style="width: 100%" src="audio.mp3">
  <source class="u-audio" type="audio/mpeg" src="audio.mp3">
  <track label="English" kind="subtitles" srclang="en" src="">

So, basically:

  • Use a <video> element
  • Give it a poster attribute for a nice background
  • Use an audio file for the <source> inside
  • Use the <track> element for your captions/subtitles/etc.

But is that the whole story? Sadly, no.

Creating Subtitles/Captions in WebVTT Format

In some ways, This Week in the IndieWeb Audio Edition is perfectly suited for automated captioning. In order to keep it short, I spend a good amount of time summarizing the newsletter into a concise script, which I read almost verbatim. I typically end up including the transcript when I post the podcast, hidden inside a <details> element.

This script can be fed into gentle, along with the audio, to find all the alignments - but then I have a bunch of JSON data that is not particularly useful to the browser or even Facebook's player.

Thankfully, as I mentioned above, the BBC audiogram generator can output a Facebook-flavored SRT file, and that is pretty close.

After reading into the pretty expressive WebVTT spec, playing with an SRT to WebVTT converter tool, and finding an in-browser WebVTT validator, I found a pretty quick way of converting those in my favorite text editor which basically boils down to changing something like this:

00:00:02,24 --> 00:00:04,77
While at the 2017 IndieWeb Summit,

00:00:04,84 --> 00:00:07,07
I sat down with some of the
participants to ask:

Into this:


00:00:02.240 --> 00:00:04.770
While at the 2017 IndieWeb Summit,

00:00:04.840 --> 00:00:07.070
I sat down with some of the
  participants to ask:

Yep. When stripped down to the minimum, the only real differences in these formats is the time format. Decimals delimit subsecond time offsets (instead of commas), and three digits of precision instead of two. Ha!

The Future

If you've been following the podcast, you may have noticed that I have not started doing this for every episode.

The primary reason is that the BBC audiogram tool becomes verrrrry sluggish when working with a 10-minute long transcript. Editing the timings for my test post took the better part of an hour before I had an SRT file I was happy with. I think I could streamline the process by editing the existing text transcript into "caption-sized" chunks, and write a bit of code that will use the pre-chunked text file and the word-timings from gentle to directly create SRT and WebVTT files.

Additionally, I'd like to make these tools more widely available to other folks. My current workflow to get gentle's output into the BBC audiogram tool is an ugly hack, but I believe I could make it as "easy" as making sure that gentle is running in the background when you run the audiogram generator.

Beyond the technical aspects, I am excited about this as a way to add extra visual interest to, and potentially increase listener comprehension for, these short audio posts. There are folks doing lots of interesting things with audio, such as the folks at Gretta, who are doing "live transcripts" with a sort of dual navigation mode where you can click on a paragraph to jump the audio around and click on the audio timeline and the transcript highlights the right spot. Here's an example of what I mean.

I don't know what I'll end up doing with this next, but I'm interested in feedback! Let me know what you think!

📕 Finished reading Twitter and Tear Gas: The Power and Fragility of Networked Protest by Zeynep Tufekci.

Great insights into how people, technologies, and entrenched power structures have been shaping one another in the era of the social network. Lots of hard work ahead for folks that don’t want a depressing future.