There is a HUGE problem with this software. It must hear the whole movie to generate the subtitles.
Much easier look for published subtitles and then run SubtitleEdit to translate, if needed.
Thanks anyway.

ok, I used an external NVIDIA card and it worked, but (!) when I translate an English video to another language sub on the fly it is pretty inaccurate. Offline AI sub generator engine is greatly outdated and dummy. Needs a lot more development to catch up to speed on this market!

Well it turns out to be it is not working as it advertised. Still stick with the Cloud AI.

After Install I just got a "Waiting for subtitles" Yellow Text on a black background. No GUI. Restarting NexSub brought up the GUI.

Seems like this is targeted more for the hearing impaired crowd then the anime looking for translated subtitles crowd. Still, if its accurate, it's not to hard to dump the .srt file into llama or similar offline AI, have it do the translation and ignore the timestamp data.

It doesn't say much about it here. My understanding is you need a chunky Nvidia Card to run it, but I'm not sure which Languages it supports. It's been given away a lot but I couldn't find out if it's safe to run, it seems likely it is the original program from the authors though, be nice to know more about them...

Another giveaway site said:

"100% On-Device AI Processing for Absolute Privacy: Your video and audio streams never leave your computer, eliminating cloud leaks, corporate telemetry, and security vulnerabilities.

Unrestricted Offline Operation: Generate highly accurate subtitles anywhere in the world without an active internet connection or high-speed Wi-Fi network.

Direct Real-Time System Audio Translation: Eliminate the tedious hunt for external subtitle files by dynamically transcribing and translating system sound from any player, browser, or stream.

Massive Global Linguistic Coverage: Break through regional barriers with comprehensive support for over 100 languages, handling complex dialects, accents, and specialized vocabulary.

Zero Subscriptions and Permanent Lifetime Value: Skip the predatory monthly fees and per-minute transcription costs plaguing the AI industry by securing a full $19 lifetime license for absolutely free."

Another:

"System Requirements & Details:

Operating system Windows 10 / 11

Graphics card NVIDIA dedicated GPU required — minimum GTX 1660 / RTX 2060 with 6 GB VRAM; recommended RTX 3060 / 4060+ with 8 GB+ VRAM

Download size ~2.9 GB

Other requirements Microsoft .NET 8 (installed automatically); 7-Zip or similar to unpack the archive; Stereo Mix or equivalent audio loopback enabled in Windows

Internet connection Required once to download. Activation and everyday use are fully offline

Languages supported 100+ languages including regional variants and accents"

I note some reviews elsewhere:

"Also it DOES NOT TRANSLATE the spoken text into another language as the description and user interface implies it remains in the spoken language "

"oh all steelsoft AI products vomit out a few gigabytes of TEMP files onto the system drive when processing and leaves them there when the program exits containing many subfolders with python files and compiled python and copies of the AI model inferences rather than keeping them where they are chosen to be installed. They are not built to be easy on the systems they’re installed on."

According to AI:
Hardware gate: It requires an NVIDIA GPU — without one, it won't run.

It's probably good software. Thanks!