AI Subtitle Generator (Free Beta): Fast & Accurate Multilingual Subtitles

Konor-Xu · 2025-04-21T04:56:49+00:00

🎉 Official Release – May 15, 2025 Update We’re thrilled to announce that Subtitle Generator AI is now officially out of beta! With this release, we’...

tim1885009

Alex_Videoman Yep - I’ve got a job that’s been queued for cloud audio analysis at position no. 6 since about 9 am - nearly 3-½ hours ago.

Alex_Videoman

Seems to be finally back at 7pm PST, so a 10h outage again

Konor-Xu

Alex_Videoman
Hi Alexis! 👋 We just wanted to take a moment to say how much we appreciate your ongoing engagement with us - it’s been wonderful having you around!
To help us recognize you even better, would you mind updating your profile with a photo and nickname you like? That way we can give you a more personalized experience. Thanks so much for being part of our community!

Alex_Videoman

Konor-Xu done, I am happy to help and provide feedback, there are still quite a few things I’d like to improve here: compressor bug with audio multi track, DoVi not working because of the bug with profile 5, issue with having multi-language videos in the subtitle generator, audio upmix with multiple audio, etc….

Alex_Videoman

Konor-Xu The major issue right now is the major bug you have with Dolby Visionwhich is not working with any of the major players such as Plex, Emby, VLC, etc…
I documented the bug for you more than 2-3 weeks ago and yet, no news on when you are going to fix it as right not you just do not support Dolby Vision at all.
I just posted some more help in the other relevant threads.
This just should be the most critical thing for your team to work on right now as it is false advertising that you support Dolby Vision as of today you are not.

maineiac13

I have become somewhat disappointed with this app. While I can understand the occasional error in wording of the subtitles, it is the obviously intentional change of words by the app which makes it very distracting to watch and listen to. It is as if the app has decided it can write the words of a conversation better that the screenwriter. Even if that might be true…the subtitles are supposed to represent what the characters are saying, not what AI might think they should have said.
Here is just one example of what I am talking about, It occurs in episode 3 of “A Dance to the Music of Time” at about the 1 hour 7-minute mark. Actual conversation on the left with subtitles on the right

She’s Gone Off Her Rocker….. She’s Completely Gone Off The Rails
To tell the Truth… … To Be Honest…
About the whole bag of things….. With the whole lot of it, really
This awful business of one’s age….. This whole business of getting older is dreadful
You’re not young enough old boy….. You’re not young anymore, old chap
I’ve always been told that lately….. That’s what I keep hearing these days.
I used to think I was rather a success with the ladies….. I used to think I did quite well with women.

As you can see it is not that the app has accidentally misheard a word or two, but instead it has decided to change the words into something that may be similar to the intent of the conversation, but that is quite intentionally distinct for those actual words. Unfortunately this occurs throughout this and most of the other subtitled videos that I have begun to watch using this app.

vivi

maineiac13 We have already reported the issue of inaccurate subtitle generation to the relevant department. We will strive to enhance your user experience.

rmikes1454544

While the subtitle generator is fast and about 90% accurate (NOT 99%) it needs several things to improve it.

First, it needs instructions that say more than do this or do that, it needs more. E.g. the instructions say an SRT file can be uploaded and used to generate a more accurate subtitle listing. The instructions DON’T say precisely how to do it. I tried to upload an SRT file by itself and I get the following error message:

“The path you have chosen does not have write permissions, please select another path.”

This is wrong in several ways.
-I didn’t chose a path, I dragged the SRT file into the Subtitle Generator.
-I double checked the folder I dragged it from; the folder DOES HAVE write permissions

A clear set of thorough instructions would most likely eliminate this difficulty.

Secondly, I doesn’t automatically find the language for all video files. I own a TV Rip of Tales of Wells Fargo (1957). It did detect the video language for the first season (which was only 14 episodes) and totally failed to discover the video language for the remaining 5 seasons.

Third, the failure to find the video language exposed another problem, the lack of a settings panel for the subtitle generator. When the video can’t be determined, it needs to be chosen by hand. The seasons that contain 36+ episodes and can’t determine the video language means hand setting for 36+ episodes. That is too much of a PITA to bother with. A settings panel would allow changes to be made to all by chosing the language one time for all entries, the way the Video Converter does.

Please fix these items because I WILL NOT set each separately, I’ll just find a source for the subtitles online. I purchased this module to save myself time and is it not doing that as is.

Thank you,
Mike Schiavone

Alex_Videoman

rmikes1454544 I do not disagree with you on the lack on documentation here.
But if you already have an srt file for the video you do not need the app anyway, it defeats the purpose here really…
Now you can use filebot to find if there are srt for your TV show and then if there are, it is an easy way forward and you really do not need unifab, if there is not, I would suggest you to download the season of the show again from https://tpb.party/search/Wells%20Fargo%20(1957)/1/99/0.
They should be tagged in english solving your issue.
Last resort is to use mkvtoolnix to change language from unknown to english.

vivi

rmikes1454544 “The path you have chosen does not have write permissions, please select another path.”

Regarding the default path issue you mentioned, we recommend the following two solutions:

If you need to write files in the current path, you can confirm the UAC prompt to obtain administrative privileges.
Alternatively, you can change the save path in the Model Manager and select another folder to save files, thereby avoiding permission restrictions.

rmikes1454544 I doesn’t automatically find the language for all video files. I own a TV Rip of Tales of Wells Fargo (1957). It did detect the video language for the first season (which was only 14 episodes) and totally failed to discover the video language for the remaining 5 seasons.

It doesn’t support to automatically recognize language for source videos, you need to select manually.

rmikes1454544 the failure to find the video language exposed another problem, the lack of a settings panel for the subtitle generator. When the video can’t be determined, it needs to be chosen by hand. The seasons that contain 36+ episodes and can’t determine the video language means hand setting for 36+ episodes. That is too much of a PITA to bother with. A settings panel would allow changes to be made to all by chosing the language one time for all entries, the way the Video Converter does.

Currently, it is not supported to set the output language of all videos at once. We will consider this requirement. Add this function in future versions.

rmikes1454544

Alex_Videoman When I read what little I could find about uploading existing, as I understood it in the pitiful excuse for documentation was that I could get improved accuracy to the on the timing and accuracy of the SRT. To me that meant doing additional passes using the existing SRT as a baseline to improve upon. Awesome, right!?

Alas, upon re-reading all 20 something SENTENCES of documentation, I find one of teh last couple sentences in the section it refers to uploading a subtitle for translation.

Ok, while this was my failure to see the true purpose of uploading SRTs and instead, overlayed my hopes as to what it may be, there is still the fact that when I tried to upload an SRT file, it was refused with the previously mentioned error message. I never got far enough for the app to explain to me the function of uploading SRT files.

I don’t really care that the module isn’t finding the video language, certainly not enough to alter the video to assign the language. I’m sure it will be language detection will be improved in time. The ideal fix is to allow the user the ability to “apply to all”. I’ve been using the video converted for years. It contains a settings panel for choosing A/V recording characteristics. at the bottom of the panel, the is a button to apply the settings to the entire list.

This fix will eliminate the tedium of making the exact same change to each list entry. If the list is longer than 2 pages, a manual adjustment is error prone.

Btw, that is where I got my seasons of the show. Lol

Have a great day,
Mike

Alex_Videoman

rmikes1454544
I can not agree more that a lot of small improvements needs to be made here, and not only to the subtitles, there are still a lot of large bugs in HDR upmix, audio upmix, etc…
As far as I am concerned, I am using subtitles app only when I can not get the srt files online or from the video itself, using shutter encoder to extract it most of the time…

rmikes1454544

Alex_Videoman
I download subtitles as well. I was very happy to see the ability to generate subtitles because I have videos that do not have subs available and for times like I encountered with the Tales of Wells Fargo, when the only subs available are mismatched to the video.

And, yes, there are still bugs in other modules, but they are slowly improving. I don’t understand why they wait so long to add items that were added to other modules, like the settings panel. It seems as though they are concerned with the getting the module’s main functionality than the products usability.

The toolbox for UniFab has an excellent subtitle extractor that I’ve had no trouble with. :)

Have a good day,
Mike

rmikes1454544

First, let me thank you for responding. I very much appreciate it.

vivi "If you need to write files in the current path, you can confirm the UAC prompt to obtain administrative privileges.
Alternatively, you can change the save path in the Model Manager and select another folder to save files, thereby avoiding permission restrictions."

What?!? This makes NO (0) SENSE. When uploading a video to generate subtitles from, UniFab creates a “Subtitle” folder in the source folder to deposit the newly generated subtitle. There are no (0) problems either creating the folder nor writing to the “Subtitle” folder. (See attached screen shot).

vivi “It doesn’t support to automatically recognize language for source videos, you need to select manually.”

Again: What?!? The guide docs specifically says that it DOES automatically source language. (See attached screen shot)
Furthermore, it DID automatically detect the source language for the the first 2 seasons of the show. I verified this by copying the seasons to a different location and having UniFab generate subtitles again.

vivi “Currently, it is not supported to set the output language of all videos at once. We will consider this requirement. Add this function in future versions.”

Why?!? his feature is available in the other modules I’ve used. it should have already been added as it effects the overall usability of the module.

As a programmer myself, I understand the functioning of the module is your first concern. But, when I write a new module to one of my projects, I carry over common usability from previously completed modules. I want my users to feel as though the separate modules belong together, not just a tossed together list of functions.

I notice you made no remark to my statement that the module is only about 90% accurate. let me expand on my original remark:

While the meaning of the subtitles match the displayed scene, the words in may cases DO NOT match the words spoken. The module understands the meaning of the words spoken, so why doesn’t it ALWAYS USE the words spoken?

The words spoken match the timeline for the most part, however, many subtitles contain multiple sentences. When this happens, the first sentence matches the video timeline, but the sentences the follow, are delivered immediately, rather than matching the timeline. Aside from the early display, the multiple sentences utilize an HUGE part of the screen for the video display. The result is that every single SRT file needs editing. This isn’t much of a problem for a single movie video, but a TV season, makes for a very large project.

I love the UniFab modules that have good usability, I’m just asking for the new modules carry over the same usability.

Thank you for your time and effort,
Mike Schiavone

vivi

rmikes1454544 Thank you for your detailed feedback and for sharing your experience with us.

Previously, our server supported automatic language recognition. However, due to certain reasons, we had to switch to a new server, which has temporarily affected the language detection capability. We sincerely apologize for the inconvenience this has caused. We will modify the relevant documents.

We are currently planning the batch video language modification feature and expect it to be available in the near future.

We have reported the issue regarding inaccuracies in certain areas and will strive to optimize this feature.

We are actively working to restore and improve this feature as soon as possible. Your feedback is very valuable to us, and we appreciate your patience and understanding.

rmikes1454544

vivi
Thank you for your response.

I look forward to the new updates as they become available.

Mike Schiavone

rmikes1454544

vivi as I am going through the subtitles generated by UniFab Subtitle Generator using Subtitle Edit, I am finding that some mistakes in the newly generated subtitles seem to be the AI trying to correct grammar. Here are just a few examples:

dialog: I never heard nothing.
UniFab: I didn’t hear anything.

dialog: It don’t fit.
UniFab: It doesn’t fit.

dialog: Well, that sure simples it up.
UniFab: Well, that sure simplifies things.

dialog: Yes, slicker than a whistle
UniFab: Yes, liquor and a whistle.

dialog: What do I gotta be nervous about?
UniFab: What do I have to be nervous about?

dialog: Well, if it ain’t Bill Henry.
UniFab: Well, if it isn’t Bill Henry.

dialog: He’s out yonder beddin’
UniFab: He’s out there beddin’

dialog: gosh darnedest blowout any trail
UniFab: biggest blowout any trail

These examples show that UniFab recognizes the meaning of the words its listening to and changing the words to a more grammatically correct version. I’m watching shows about the old, wild west. Changing the grammar is NOT appreciated. It seems as though UniFab thinks I am turning a report and that the grammar should be corrected.

I alluded to this problem in an earlier post and looked for examples. All the above examples came from the same 26 minute video. There were quite a few more that I didn’t take note of.

Have a good day,
Mike Schiavone!

vivi

rmikes1454544 Thank you for your proposal. We have already passed on your request to our product&tech team, and they will take your suggestion into consideration.

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