SZszastupov·Nov 5, 2020
A few years ago I was using this port https://github.com/Kagami/ffmpeg.js
It was still asm.js but working just fine.
In A pure WebAssembly / JavaScript port of FFmpegKagami
ffmpeg.js
JavaScript2016–2025
Kagami / ffmpeg.js
ffmpeg.js
Port of FFmpeg with Emscripten
8Distinct people
10Mentions
0Explicit recommenders
3.5KGitHub stars
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What it is
Port of FFmpeg with Emscripten
GitHub
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What people are saying
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This week on Hacker News
Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 2:04:58 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year10 dated mentions
Observed mentions: 2016-12-06 12:04:53 UTC to 2025-06-04 16:39:28 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
4 sourcesThis is really awesome -- was interesting to see FFmpeg being used fully client-side.
I had previously used this ffmpeg WASM port (https://github.com/Kagami/ffmpeg.js) and hadn't seen the one you're using before (https://github.com/ffmpegjs/ffmpeg.js). Any thoughts on their pros & cons?
Also, I'm the maintainer of the awesome-ffmpeg list - mind if I add this to there?
In Show HN: A stupid website for animating images on top of videos (HTML5 and WASM)With FFmpeg builds being produced for browsers[1], it'd be great see this working in a web app. I tried making one a few years back, but it was a little early. It only worked in Chrome, on a desktop, and with smallish MP4s at the time[2].
[1] https://github.com/Kagami/ffmpeg.js/
[2] https://zvakanaka.github.io/vidslicer/
In How to trim video clips instantly without reencodingIt's been on the back burner for a year due to starting a family, but my side project is a still|animated meme captioner.
https://ultime.me
I was frequently annoyed at the lack of middle ground between easy purpose-built image captioning tools (as opposed to general image editors like Gimp), and full blown video editors just to make animated memes.
I intend to use some of the extra home time to improve the UI and maybe start adding social features and content import from external urls/clipboard. The user experience is pretty rough now.
Not sure I want to host user generated content and deal with DMCA for a hobby project.
It's not open sourced (yet), but the fun facts are that it's Clojure/Clojurescript w/ Rum as a react wrapper for the frontend.
Have to say - Clojure(script)'s immutable data model is a dream for handling undo/redo in cont
Read the rest
ent editing. It also makes the path to a multi-user editor a'la Google Docs pretty simple.
Video encoding to animated gif & webm uses:
https://github.com/Kagami/ffmpeg.js
It's an almost completely a client side app - the video encoding happens in browser so the user content remains private.
(edit: better words)