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 <!-- Automatically generated by emacsconf-publish-after-page -->
 
 
+<a name="cubing-mainVideo-transcript"></a>
+# Transcript
+
+[[!template new="1" text="""Hello, everyone, and welcome to Speedcubing in Emacs.""" start="00:00:00.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""First of all, a little bit about myself.""" start="00:00:08.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""My name is Vasilij Schneidermann. Online, I go by wasamasa.""" start="00:00:10.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I'm 31 years old. I work in information security,""" start="00:00:13.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and I do consulting and hacking""" start="00:00:18.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and stuff like figuring out""" start="00:00:20.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""how to break into other people's computers""" start="00:00:22.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and how to secure their systems basically.""" start="00:00:25.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""You can reach me by email.""" start="00:00:29.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I do have a self-hosted code repository thingy going on.""" start="00:00:31.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I have a blog, and you can find me""" start="00:00:36.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""in some other places online, like IRC for example.""" start="00:00:40.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So about the talk itself,""" start="00:00:45.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I used to be into the Rubik's cube when I was in school.""" start="00:00:48.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I forgot about it, though,""" start="00:00:52.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because these cubes were not very good.""" start="00:00:54.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Recently I did find some cheap looking cube at a shop.""" start="00:00:56.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Did not pay terribly much for it.""" start="00:01:02.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It was so, so much better than my old cube,""" start="00:01:04.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it was unreal.""" start="00:01:07.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This motivated me to get back into""" start="00:01:08.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""this really weird kind of hobby.""" start="00:01:11.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this, you need to be good at producing""" start="00:01:13.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a truly random scramble""" start="00:01:18.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and timing your attempts to get any better at it.""" start="00:01:19.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""There is, of course, existing software""" start="00:01:22.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to do the scrambling for you and the recording""" start="00:01:23.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and the timekeeping and such,""" start="00:01:26.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but all the good options seem to be either web or mobile,""" start="00:01:28.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""for example the cstimer software""" start="00:01:31.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or the twisty-timer app on Android.""" start="00:01:33.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""To my surprise, I did not find a single decent option""" start="00:01:35.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""inside Emacs, so this is basically a case study""" start="00:01:39.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""how to do better. For this, I wanted to make use of""" start="00:01:41.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""all the cool new Emacs features that appeared,""" start="00:01:45.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""like the SVG library; Transient,""" start="00:01:47.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the library used for the Magit-style interfaces;""" start="00:01:50.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and the recently added sqlite-mode.""" start="00:01:53.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And most importantly it was about having fun.""" start="00:01:56.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""So here's a full list of prior art,""" start="00:02:01.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I will not go into detail about this,""" start="00:02:02.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but basically we have things solving""" start="00:02:04.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""very different parts of this,""" start="00:02:06.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but not all of it. For example: we have several,""" start="00:02:08.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""we have a timer. We have several solvers.""" start="00:02:10.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""We have some scramblers.""" start="00:02:14.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""We have some whole-cube simulators, including a 3D one.""" start="00:02:16.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""We have something for making it easier""" start="00:02:19.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to enter your algorithms in the notation.""" start="00:02:20.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But nothing that does all of those things in one package,""" start="00:02:23.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""which kind of surprised me.""" start="00:02:25.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So I present the `wca-prep` package.""" start="00:02:28.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""So the name, I found it difficult""" start="00:02:32.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to come up with a good name and so I looked""" start="00:02:35.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and I saw, well there's this World Cube Association""" start="00:02:39.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that holds these competitions where you compete.""" start="00:02:42.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They do this for the Rubik's cube""" start="00:02:46.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but also a few others,""" start="00:02:47.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so there's like a standardized list""" start="00:02:48.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""of events they have for this.""" start="00:02:50.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""There is a standard notation for this""" start="00:02:52.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and rules and everything.""" start="00:02:55.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And the goal of my package is basically""" start="00:02:56.520" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to help prepare myself for such a competition""" start="00:02:58.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and in fact a week ago I went to my first one""" start="00:03:01.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""which was wild, but pretty cool.""" start="00:03:03.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So for this reason I chose this name wca-prep,""" start="00:03:06.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because it helps me prepare for this kind of competition""" start="00:03:10.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and this limited the scope significantly,""" start="00:03:13.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""I have a scrambler, visualization of the scramble,""" start="00:03:16.520" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""timer, and statistics.""" start="00:03:19.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I excluded pretty much everything else I've seen.""" start="00:03:23.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this reason, I only tried to focus on""" start="00:03:25.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""some very basic puzzles I can solve comfortably,""" start="00:03:28.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and did not want to do anything else""" start="00:03:32.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that may complicate things significantly.""" start="00:03:34.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""No other kinds of puzzles, no simulation, no solving,""" start="00:03:36.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""no exotic events, and no specialized scrambles""" start="00:03:40.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that are only good for practicing specific algorithms.""" start="00:03:43.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""So at this point the organizer should hopefully show""" start="00:03:49.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a small video I've prepared, a one minute video showing how""" start="00:03:54.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I actually use this to solve a cube and to time my solve.""" start="00:03:58.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""Okay, so building this thing, there were several challenges.""" start="00:05:19.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""The first one was how do I even represent""" start="00:05:22.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the state of a Rubik's cube.""" start="00:05:24.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this there are many possible representations,""" start="00:05:26.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""no obvious best solution.""" start="00:05:29.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did not, well, what helped me was that""" start="00:05:32.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did not have to programmatically solve this thing,""" start="00:05:34.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so I picked the easiest possible representation""" start="00:05:36.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""which is just an array of every single facelet.""" start="00:05:39.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For a 3x3 cube you have 9 facelets on one side,""" start="00:05:42.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so times 6 sides you would have 54 elements in this array.""" start="00:05:46.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So with this representation, it's very simple,""" start="00:05:51.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but it's kind of weird to do scrambles with this.""" start="00:05:54.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But otherwise, it worked very, very well.""" start="00:05:56.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""In the future, I plan to learn some group theory,""" start="00:05:59.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""pick a better representation""" start="00:06:01.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and do this in a much, much more elegant way""" start="00:06:03.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""without compromising speed too much.""" start="00:06:05.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Yes. Once I had the representation,""" start="00:06:12.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the scrambling itself should not be too hard.""" start="00:06:15.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this, it's important to consider that basically""" start="00:06:18.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you do a face turn""" start="00:06:22.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""you end up swapping some facelets with other facelets,""" start="00:06:23.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that's the easiest way to think about this.""" start="00:06:26.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""To determine which one goes into which one's position,""" start="00:06:30.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it was pretty confusing to figure this out.""" start="00:06:33.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this I went through a few papers,""" start="00:06:36.922" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and I found one which suggested""" start="00:06:38.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to just build a cube out of paper,""" start="00:06:40.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""number every facelet, and turn it""" start="00:06:42.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and keep track of which facelet moved into which position.""" start="00:06:44.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And programmatically, the `cl-rotatef` macro""" start="00:06:48.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""was very, very useful for doing this kind of""" start="00:06:51.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""in-place swapping you need for this operation.""" start="00:06:53.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So in the future, group theory would hopefully""" start="00:06:56.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""make this a bit less awkward.""" start="00:06:59.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Here's a photo of this paper cube I made""" start="00:07:02.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""along with a real cube. As you can see""" start="00:07:04.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""mathematically speaking, they are the same thing,""" start="00:07:08.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""they just look very, very different.""" start="00:07:11.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So the scramble algorithm itself,""" start="00:07:13.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I pondered how this would even be done. In the competitions,""" start="00:07:18.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They do this in a very, very elaborate way.""" start="00:07:23.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They generate a random cube,""" start="00:07:26.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they try to solve it, and if it's solvable""" start="00:07:27.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they use these solution moves""" start="00:07:29.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to turn into a scramble basically.""" start="00:07:33.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And they also make sure to canonicalize the moves,""" start="00:07:35.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so if you have subsequent moves that can be simplified,""" start="00:07:39.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they do simplify these as much as possible.""" start="00:07:43.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For example,""" start="00:07:45.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you have two subsequent rotations in one direction,""" start="00:07:45.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it's turned into a different kind of rotation,""" start="00:07:48.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so 90 and 90 equals 180.""" start="00:07:51.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And the other Elisp scramblers I looked at,""" start="00:07:53.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they generate random moves.""" start="00:07:57.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Some of them do canonicalize. Not all of them.""" start="00:07:59.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This one tries to do the best low-fi thing,""" start="00:08:01.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that is, generating random moves,""" start="00:08:05.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""canonicalizing and repeating""" start="00:08:06.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""until enough have been generated.""" start="00:08:08.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""For the visualization I had to figure out""" start="00:08:14.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""something else too complicated.""" start="00:08:17.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this, I tried to figure out""" start="00:08:18.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""where every facelift would end up in the puzzle view""" start="00:08:21.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""when you would unfold it.""" start="00:08:24.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And for this, I did not consider the facelet orientation.""" start="00:08:25.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This may be important later for some other puzzles""" start="00:08:30.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""where you can end up with very twisted faces,""" start="00:08:33.720" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but for simple cubes, it's not a problem.""" start="00:08:35.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""My initial prototype used colored text,""" start="00:08:37.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but later, I used the SVG library.""" start="00:08:40.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It turned out to be easy enough to use, actually.""" start="00:08:43.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Currently, I have hard-coded face-color mappings,""" start="00:08:46.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but I plan to replace this so that theming is possible.""" start="00:08:50.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For example, if you happen to have a cube""" start="00:08:53.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that does not have the same color mappings as I do,""" start="00:08:56.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""then you should be able to fix this.""" start="00:08:59.141" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Next challenge was to build""" start="00:09:00.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a beautiful intuitive UI with Transient.""" start="00:09:05.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""The reason why I chose this is""" start="00:09:08.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because it would be self-documenting and Magit-style,""" start="00:09:11.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and everyone knows how Magit works basically.""" start="00:09:14.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Since Transient has become part of Emacs,""" start="00:09:16.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""there is really no reason to not try it out.""" start="00:09:19.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""The problem was documentation is difficult to understand.""" start="00:09:21.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It's very abstract and high level,""" start="00:09:26.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and it's hard to figure out. &quot;Okay,""" start="00:09:27.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want to do something,""" start="00:09:30.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""how am I supposed to do this?&quot;""" start="00:09:31.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did find transient-showcase, which has lots of examples,""" start="00:09:33.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but they don't really feel finished""" start="00:09:37.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and not realistic enough.""" start="00:09:40.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""When I tried to use the package,""" start="00:09:43.520" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I got plenty of unhelpful error messages""" start="00:09:45.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""when using it incorrectly.""" start="00:09:47.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did manage to figure it out,""" start="00:09:48.560" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but I plan to find more actual examples of it,""" start="00:09:50.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to have an executable reference basically""" start="00:09:55.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""and try to improve my use of it.""" start="00:09:57.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For the book-keeping, I used SQLite.""" start="00:10:00.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This is a very recent addition to Emacs,""" start="00:10:06.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it only appeared in the current major version.""" start="00:10:09.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It's still very early days.""" start="00:10:11.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I found some oddities, one of them turned out to be""" start="00:10:13.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a bug in the transaction macro.""" start="00:10:17.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Like basically, if you do an SQL transaction""" start="00:10:19.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and an error happens, then every helper I found""" start="00:10:22.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""does a rollback on an error.""" start="00:10:24.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But this one did not. It actually committed on an error,""" start="00:10:25.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and this was very weird to figure out.""" start="00:10:31.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I reported a bug. Eli was nice enough to send me a patch.""" start="00:10:34.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""We did some patch review,""" start="00:10:38.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and he ended up fixing it properly.""" start="00:10:39.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yes, there's still a lot to be done there, and yeah,""" start="00:10:42.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the API is very basic.""" start="00:10:50.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""You don't have convenience helpers""" start="00:10:51.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""like fetch the first row or fetch the first value""" start="00:10:53.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or anything, but they're easy enough to write yourself.""" start="00:10:55.760" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And the biggest challenge with this bookkeeping part""" start="00:10:58.881" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""was figuring out a decent schema,""" start="00:11:00.821" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""like how to organize data correctly""" start="00:11:02.480" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so that it would not be awkward to manipulate.""" start="00:11:04.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And with this, you can finally build a package""" start="00:11:06.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that remembers its state properly""" start="00:11:10.200" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and don't have to run into foot guns""" start="00:11:11.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""with Lisp-style serialization, deserialization.""" start="00:11:14.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yes, that concludes it so far.""" start="00:11:17.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So what did I learn from this exercise?""" start="00:11:22.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Well, there are still plenty of packages""" start="00:11:26.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""for Emacs to be written.""" start="00:11:28.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""If you think everything you can think of""" start="00:11:30.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or you need has already been written, well, guess what?""" start="00:11:33.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""No.""" start="00:11:35.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These are still plenty of specialized things""" start="00:11:36.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that could need your help.""" start="00:11:38.496" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These cubes do not require advanced mathematics,""" start="00:11:41.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""contrary to what you may think.""" start="00:11:44.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Yes, you can apply advanced mathematics to them""" start="00:11:45.600" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you want to, but you don't have to.""" start="00:11:49.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""What surprised me about this is basically group theory.""" start="00:11:51.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I've heard of it before.""" start="00:11:55.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It seemed to be a meme, basically,""" start="00:11:56.520" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because it has been like mostly Haskell people""" start="00:11:58.280" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""being very excited about this""" start="00:12:00.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and it seemed kind of, like, divorced from reality, basically.""" start="00:12:02.640" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But this puzzle, it actually proves that yes,""" start="00:12:06.960" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it has its use.""" start="00:12:10.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It definitely has.""" start="00:12:11.400" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""You just have to find the right problem matching it,""" start="00:12:12.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and yeah.""" start="00:12:15.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yeah, once I understand it better,""" start="00:12:17.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the topic, I expect to write better code.""" start="00:12:19.840" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These new Emacs features, they work well enough.""" start="00:12:23.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""There are some rough edges.""" start="00:12:28.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They definitely need more testing.""" start="00:12:30.360" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So please, please, everyone,""" start="00:12:31.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you write Elisp, please try SQLite or Transient""" start="00:12:35.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or anything else that looks cool and shiny.""" start="00:12:39.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Report bugs.""" start="00:12:41.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Find ways to improve them, anything. And yeah,""" start="00:12:42.920" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I'm sure that if we do this,""" start="00:12:46.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""then Emacs will continue to get even better.""" start="00:12:49.320" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yeah, what's next for this package?""" start="00:12:52.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Well, I could... There are lots of obvious UI improvements""" start="00:12:56.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and testing to be done.""" start="00:13:00.440" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I basically want to reach feature parity""" start="00:13:01.800" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""with the twisty-timer app, which this is very much inspired by.""" start="00:13:04.160" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want nice-looking stats like graphical ones""" start="00:13:06.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""instead of just a simple list of times.""" start="00:13:11.120" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And I want support for more puzzles, of course,""" start="00:13:13.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""not just the simple cubes,""" start="00:13:15.680" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but as I progress learning these puzzles,""" start="00:13:17.000" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want to have Emacs supporting me for this.""" start="00:13:19.040" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But generally, it's a very open-ended package.""" start="00:13:22.520" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And this concludes the talk.""" start="00:13:26.880" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Thank you very much.""" start="00:13:31.080" video="mainVideo-cubing" id="subtitle"]]
+
+
+
+Captioner: sachac
+
 Questions or comments? Please e-mail [mail@vasilij.de](mailto:mail@vasilij.de?subject=Comment%20for%20EmacsConf%202022%20cubing%3A%20Speedcubing%20in%20Emacs)
 
 
diff --git a/2023/info/cubing-before.md b/2023/info/cubing-before.md
index 8ce89cbb..bb58c7c1 100644
--- a/2023/info/cubing-before.md
+++ b/2023/info/cubing-before.md
@@ -8,12 +8,26 @@ The following image shows where the talk is in the schedule for Sun 2023-12-03.
 Format: 14-min talk; Q&A: IRC <https://chat.emacsconf.org/?join=emacsconf,emacsconf-gen>
 Etherpad: <https://pad.emacsconf.org/2023-cubing>  
 Discuss on IRC: [#emacsconf-gen](https://chat.emacsconf.org/?join=emacsconf,emacsconf-gen)  
-Status: Ready to stream  
+Status: Now playing on the conference livestream  
 <div>Times in different timezones:</div><div class="times" start="2023-12-03T16:35:00Z" end="2023-12-03T16:55:00Z"><div class="conf-time">Sunday, Dec 3 2023, ~11:35 AM - 11:55 AM EST (US/Eastern)</div><div class="others"><div>which is the same as:</div>Sunday, Dec 3 2023, ~10:35 AM - 10:55 AM CST (US/Central)<br />Sunday, Dec 3 2023, ~9:35 AM - 9:55 AM MST (US/Mountain)<br />Sunday, Dec 3 2023, ~8:35 AM - 8:55 AM PST (US/Pacific)<br />Sunday, Dec 3 2023, ~4:35 PM - 4:55 PM UTC <br />Sunday, Dec 3 2023, ~5:35 PM - 5:55 PM CET (Europe/Paris)<br />Sunday, Dec 3 2023, ~6:35 PM - 6:55 PM EET (Europe/Athens)<br />Sunday, Dec 3 2023, ~10:05 PM - 10:25 PM IST (Asia/Kolkata)<br />Monday, Dec 4 2023, ~12:35 AM - 12:55 AM +08 (Asia/Singapore)<br />Monday, Dec 4 2023, ~1:35 AM - 1:55 AM JST (Asia/Tokyo)</div></div><div><strong><a href="/2023/watch/gen/">Find out how to watch and participate</a></strong></div>
 
 
 
 
+<div class="vid"><video controls preload="none" id="cubing-mainVideo"><source src="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.webm" />captions="""<track label="English" kind="captions" srclang="en" src="/2023/captions/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.vtt" default />"""<track kind="chapters" label="Chapters" src="/2023/captions/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main--chapters.vtt" /><p><em>Your browser does not support the video tag. Please download the video instead.</em></p></video>[[!template id="chapters" vidid="cubing-mainVideo" data="""
+00:00.000 Introduction
+01:35.400 Cubing in Emacs
+02:01.160 Prior art
+02:32.040 The name
+03:16.520 What's in wca-prep
+03:49.240 Demo
+05:15.340 Challenges: Representing the cube
+07:09.220 Scrambling
+08:09.500 Visualization
+08:56.420 UI with Transient
+09:55.580 Book-keeping with SQLite
+11:12.580 Conclusion
 
+"""]]<div></div>Duration: 13:35 minutes<div class="files resources"><ul><li><a href="https://pad.emacsconf.org/2023-cubing">Open Etherpad</a></li><li><a href="https://chat.emacsconf.org/?join=emacsconf,emacsconf-gen">Open public Q&A</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--alternative.webm">Download --alternative.webm (16MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--final.webm">Download --final.webm (57MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--intro.vtt">Download --intro.vtt</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--intro.webm">Download --intro.webm</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main--chapters.vtt">Download --main--chapters.vtt</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.opus">Download --main.opus (8.6MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.txt">Download --main.txt</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.vtt">Download --main.vtt</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.vtt.diff">Download --main.vtt.diff</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--main.webm">Download --main.webm (57MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--normalized.opus">Download --normalized.opus (12MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--original.mkv">Download --original.mkv (11MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--presentation.webm">Download --presentation.webm (16MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--reencoded.webm">Download --reencoded.webm (73MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann--solve-demo.webm">Download --solve-demo.webm (11MB)</a></li><li><a href="https://media.emacsconf.org/2023/emacsconf-2023-cubing--speedcubing-in-emacs--vasilij-wasamasa-schneidermann.pdf">Download .pdf</a></li><li><a href="https://toobnix.org/w/wNTqAAug9r21yyUaTi6LW7">View on Toobnix</a></li></ul></div></div>
 # Description
 <!-- End of emacsconf-publish-before-page -->
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