4 ms·

This looks really nice, and I do think it fits an increasing need in a field where typically only major universities or brilliant individuals (putting in a ton

by cmehdy 6y ago

This looks really nice, and I do think it fits an increasing need in a field where typically only major universities or brilliant individuals (putting in a ton of time) on youtube usually find a place. I have a couple questions for you: - It looks like one can record a screen or a video and make "static" slides, but do you have plans to have an in-browser annotating tool ? Something where one can annotate the slides along with their recording, and edit/cut/redo parts of that whenever they make a mistake (I'm thinking of videos like eigeinchris[0] where slides are annotated as he speaks - being able to edit mistakes is something youtube just doesn't really offer so far and that would have benefited him) - What about exports? Can a teacher export a set of static slides from that presentation into a format they can later distribute/share? Can they generate a video from the whole presentation which can also be shared as a file and uploaded elsewhere (vimeo, youtube, etc)? - And just out of curiosity (and if it's not asking for too much), what's the tech stack you use for testing purposes? I've got experience with that sort of thing and I can imagine a bunch of interesting issues you must be running into! Lastly: good luck with this product and all the best! [0] https://www.youtube.com/user/eigenchris/videos?view=0&sort=dd&shelf_id=1 https://www.youtube.com/user/eigenchris/videos?view=0&sort=d...

9ranty 6y ago
- We don't have this. But we have been thinking about a more dedicated recording "mode". However, because we're in the browser we have some limits on what you could annotate. Inside of Tella would probably be fine, but outside of Tella would be tricky (e.g. you're recording another window). - We support exporting to mp4. So you'll get version of the video that you can distribute (beyond just sharing the link to Tella). We don't have plans on a slides-only export though. - We use ReasonML, Mux (for video), and Roomservice.dev (for the real-time component). Thanks for the kind words!
- rememberlenny 6y ago
  +1 for roomservice to add multiplayer to any React app with a few lines of code
- mleonard 6y ago
  Just curious about how you technically do the export to MP4. Can you share any details? Do you play it back in real time and record it, or do you have a way of exporting it quicker than real time?? What technical approach do you use if you don't mind me asking? Thanks!
  - happylinks 6y ago
    Quickly summarized we use puppeteer headfull with docker to do a recording of the video. So you’re right, it’s playing it back, not faster than real time. I might write more about the specifics in the future. It’s mostly open source code, you can start here: https://github.com/Ventricule/html2screen https://github.com/Ventricule/html2screen
    - mleonard 6y ago
      Thanks for the reply. I was wondering if you were using the headfull chrome approach! I for one would definitely love to read some more specifics on this in the future when you have time! (And if there's anything you can open source please do!). I did a quick side project proof of concept of automating recording a webpage with video and other elements a few months ago. It's a shame there's not a way of just using headless chrome but my research let me to the headfull docker approach, so I'm happy to hear I landed on the same approach you did! Did you discover any novel tricks beyond what's been written about/open sourced already? What was the trickiest part for you?
      - happylinks 6y ago
        No worries! Html2screen was a very good start, I modified it to support audio recording and got it to a pretty good state in a couple of days. After that the hard thing was just to run it automated on AWS. I used AWS Batch and Step Functions for that. When it’s a bit more stable I’ll definitely write about it and might open source it later. If you want to discuss more, feel free to email me at michiel@tella.tv
happylinks 6y ago
Not sure if you were asking about testing purposes specifically. To be honest, we don't have a testing stack yet. I am planning to use https://www.checklyhq.com/ https://www.checklyhq.com/ for end to end tests.
- tnolet 6y ago
  Checkly CTO here: We have a cool discount for early startups. Would love to help out there. Also: very cool product!
  - happylinks 6y ago
    That's great! I've made an account already a while ago, but didn't have a lot of time to set it up right yet. Would be cool to talk! (michiel@tella.tv)
  - godzillabrennus 6y ago
    How should a startup reach out to learn about the discount?
    - tnolet 6y ago
      There is a link on the FAQ on our pricing page https://www.checklyhq.com/pricing https://www.checklyhq.com/pricing or shoot me an email at tim at checklyhq dot com.
  - hmcamp 6y ago
    Hi, do you roll your own visualizations or are you using an off-the-shelf product to measure your own business metrics? I’ve always been curious how companies like your monitor their business metrics?
    - happylinks 6y ago
      Not sure if it was a question for us, but we use Segment and Amplitude mostly for business metrics

by cmehdy 6y ago

9ranty 6y ago

- We don't have this. But we have been thinking about a more dedicated recording "mode". However, because we're in the browser we have some limits on what you could annotate. Inside of Tella would probably be fine, but outside of Tella would be tricky (e.g. you're recording another window). - We support exporting to mp4. So you'll get version of the video that you can distribute (beyond just sharing the link to Tella). We don't have plans on a slides-only export though. - We use ReasonML, Mux (for video), and Roomservice.dev (for the real-time component). Thanks for the kind words!

rememberlenny 6y ago
+1 for roomservice to add multiplayer to any React app with a few lines of code
mleonard 6y ago
Just curious about how you technically do the export to MP4. Can you share any details? Do you play it back in real time and record it, or do you have a way of exporting it quicker than real time?? What technical approach do you use if you don't mind me asking? Thanks!
- happylinks 6y ago
  Quickly summarized we use puppeteer headfull with docker to do a recording of the video. So you’re right, it’s playing it back, not faster than real time. I might write more about the specifics in the future. It’s mostly open source code, you can start here: https://github.com/Ventricule/html2screen https://github.com/Ventricule/html2screen
  - mleonard 6y ago
    Thanks for the reply. I was wondering if you were using the headfull chrome approach! I for one would definitely love to read some more specifics on this in the future when you have time! (And if there's anything you can open source please do!). I did a quick side project proof of concept of automating recording a webpage with video and other elements a few months ago. It's a shame there's not a way of just using headless chrome but my research let me to the headfull docker approach, so I'm happy to hear I landed on the same approach you did! Did you discover any novel tricks beyond what's been written about/open sourced already? What was the trickiest part for you?
    - happylinks 6y ago
      No worries! Html2screen was a very good start, I modified it to support audio recording and got it to a pretty good state in a couple of days. After that the hard thing was just to run it automated on AWS. I used AWS Batch and Step Functions for that. When it’s a bit more stable I’ll definitely write about it and might open source it later. If you want to discuss more, feel free to email me at michiel@tella.tv

happylinks 6y ago

Not sure if you were asking about testing purposes specifically. To be honest, we don't have a testing stack yet. I am planning to use https://www.checklyhq.com/ https://www.checklyhq.com/ for end to end tests.

tnolet 6y ago
Checkly CTO here: We have a cool discount for early startups. Would love to help out there. Also: very cool product!
- happylinks 6y ago
  That's great! I've made an account already a while ago, but didn't have a lot of time to set it up right yet. Would be cool to talk! (michiel@tella.tv)
- godzillabrennus 6y ago
  How should a startup reach out to learn about the discount?
  - tnolet 6y ago
    There is a link on the FAQ on our pricing page https://www.checklyhq.com/pricing https://www.checklyhq.com/pricing or shoot me an email at tim at checklyhq dot com.
- hmcamp 6y ago
  Hi, do you roll your own visualizations or are you using an off-the-shelf product to measure your own business metrics? I’ve always been curious how companies like your monitor their business metrics?
  - happylinks 6y ago
    Not sure if it was a question for us, but we use Segment and Amplitude mostly for business metrics