GenSRT v1.2 — Windows tool to auto-generate SRT/VTT subtitles using Whisper

[gsadasivan]

Hi everyone,

Sharing GenSRT, a free open-source Windows tool I've been building for
subtitle work. It generates SRT/VTT subtitles from video using OpenAI Whisper,
and gives you a full workflow in one window for any language Whisper supports.

What it does

• Drop a video, click Generate, get an SRT (and a VTT in the same place)
• Edit cues in a built-in player with live preview — split, merge, delete,
  edit text and timings
• Translate to 100+ languages via Google Translate (MyMemory fallback)
• Burn subtitles into a copy of the video with one click
• Bundled ffmpeg — no separate install needed
• SRT filenames are Plex / Jellyfin / Kodi-compatible

Short demo (generate -> edit -> translate -> playback):
https://www.youtube.com/watch?v=QnW1Mqwsltk

Where it goes beyond a basic Whisper front-end
v1.2 added proper support for fine-tuned models for under-served languages.
Community Indic fine-tunes (like vegam-whisper for Malayalam) previously
couldn't handle long-form audio — they'd transcribe a few seconds and stop,
because of a token-length limit in the Whisper decoder that's especially
punishing for Indic scripts. v1.2 works around it by slicing audio along
silences and transcribing each piece independently. If you've tried subtitling
Indian-language content and been let down, set the model dropdown to
smcproject/vegam-whisper-medium-ml-int8_float16 (auto-downloads on first
run). For everything else, large-v3-turbo is the sensible default.

Requirements

• Windows 10 or 11
• NVIDIA GPU recommended (any with ~2 GB VRAM) — much faster on GPU
• CPU mode also works (about 3x slower, same output). Tested on Intel Arc
  140V (Lunar Lake laptop).
• ~2 GB free disk for the model on first run

Download / source
GitHub: https://github.com/mountlord/GenSRT
Latest release - One click installer: https://github.com/mountlord/GenSRT/releases
License: AGPL-3.0 (free and open source)

Feedback welcome — what languages you tried, what worked, what didn't.

Thanks

[gsadasivan]

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