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SubSmith

Turn your own videos into language-learning material

Details

External ID
49476894
Source
HN
Company
—
Product
SubSmith
Website domain
subsmith.app
Launched
Aug. 28, 2026
Cohort
—
Upvotes
78
Upvotes percentile
0.9045698924731183
Tags
—
Fetched at
Sept. 10, 2026, 5:31 a.m.
Updated at
Sept. 10, 2026, 5:31 a.m.

Description

I've been learning Japanese for a few years and kept running into a similar problem. I'd find a video I wanted to learn from, hear a useful sentence, and then realise that turning that sentence into something I could study later was both time consuming and draining at times.I would end up jumping between a video player, subtitles/transcription, a dictionary, screenshots, audio clips and Anki. So I built SubSmith to bring that workflow together.You can drop a video or audio file into it, generate a transcript locally and then use the transcript alongside the media to:* look up words and sentences * replay individual lines * edit the transcript * save useful sentences with their original context/audio * export them as Anki cardsThe important part for me is that it works with your own media. It isn't tied to a particular streaming service or library, so I can use the random anime episode, podcast, lecture, etc. that I'm actually interested in studying.It's an offline-first desktop app, and transcription happens locally rather than sending the media to a transcription API.I'm sharing it here because I'm now more interested in finding out where this workflow breaks down for other people rather than adding features randomly now that I have solid core/base.For example:* Would you actually save sentences from your own media? * Which part of this process feels like too much work? * Does having the audio/context attached make creating an Anki card more useful? * Would you prefer this to work inside your existing video player/browser? * Is installing a desktop app a significant barrier? * And does requiring an account before starting the free trial make you give up?The current version does require an account to start the trial, and I'm trying to work out whether that's meaningful friction for the people who would actually use this.It's free to try, and I'd particularly appreciate feedback from people who already learn languages through their own videos, anime, films, podcasts or other media.I'm the developer, so I'll be around in the comments to answer questions and discuss how it works.https://subsmith.app

Enrichment

Theme
video transcription and extraction tools
Vertical
Education
Function
Content generation
Audience
B2C
AI stance
AI feature
Project type
Commercial product
Normalized one-liner
convert videos into language learning materials
Manually corrected
False

Could you build this?

Yes SubSmith is an electron/desktop frontend wrapping Whisper (via whisper.cpp or similar) for audio/video transcription, an open dictionary for hover definitions, and AnkiConnect/APKG generation.

Discussion

20 comments analyzed.

Competitors mentioned: Migaku, Language Reactor, Lexirise, Grok CLI, Duolingo

Concerns raised: Audio quality degrades with overlapping voices or background music, Subtitle generation quality decreases for obscure languages, Less polished than alternatives like Migaku or Lexirise, No integration with YouTube, Netflix, Bilibili, Desktop app format may not align with mobile-first user preferences

Feature requests: Support for slang expressions and colloquial language detection, Mobile/companion app, Integration with streaming platforms (YouTube, Netflix, Bilibili), Ability to handle traditional character Chinese

Competitors

Other products that read as similar to this one — 191 launches clear the similarity bar, closest 8 shown.

Attention rank: #24 of 192 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).

Launched 303 days after the earliest competitor.

Other launches for this product

Same idea, different domain

Nobody's really built a content generation tool for Government yet.