[Love Trivia] Suddenly, nonsensical subtitles appear in LTX-2.3! Actually, the 'attempt to erase them' was counterproductive!? | Free AI | For AI Beginners
When I was making videos using LTX-2.3, one daysuddenly, nonsensical subtitles or captions started appearing in the videos.
And they weren't even in Japanese.
Whether it was strings of English-like characters, or characters that looked like Chinese or Korean, basically, meaningless text was being displayed on its own.
Of course, I didn't give any instructions to include subtitles.
On the contrary,
No Text
No Subtitles
No Captions
No Watermarks
No Logos
I was entering prompts like these totry to erase the subtitles.
Yet, the subtitles still appeared!
There were times when videos I had spent time generating became unusable because of those subtitles.
At first, I thought it was a prompt error
At first, I thought my prompt was bad.
However, no matter how many times I corrected it, it didn't improve.
So, when Iinvestigated using Anthropic's Claude, a surprising fact came to light.
Actually, this phenomenon wasn't just happening to me.
It had been reported many times on GitHub and Hugging Face as well
When I looked into it, there were many reports posted by users on GitHub and Hugging Face complaining of the same symptoms.
Among them,
"No Text"
"No Subtitles"
"No Captions"
there are reports that nonsensical subtitles appear even when explicitly specified.
Furthermore,cases where it does not improve no matter how many times it is generatedhave also been confirmed.
In other words, it seems highly likely that this is an issue with LTX-2.3 itself or the related pipeline, rather than how the prompt is written.
Why do subtitles appear?
At this moment, there is no official explanation.
However, what many users point out in common is the influence of the training data.
It is believed that current video generation AI is trained on a massive amount of
TikTok
YouTube Shorts
Instagram Reels
and othershort-form videos.
Since these videos very often contain subtitles or captions,
"AI may have learned that videos where people are talking have subtitles attached"
is a possibility.
Actually, the 'act of trying to erase subtitles' might be counterproductive
Here is an interesting story.
In an earnest attempt to erase the subtitles,
No Text
No Subtitles
No Captions
If you write things like a lot, it has been pointed out that you might conversely make the AI strongly conscious of the concept of 'text'. In other words,
In other words,
'Do not display subtitles!'
even though you intend to say that repeatedly,
it might be that the keyword 'subtitles' is being emphasized within the AI instead. Perhaps.
Of course, the official cause is unknown.
However, it is a fact that many users are reporting the same trend.
In my case, it improved
So I decided to take the plunge and
No Text
No Subtitles
No Captions
and other text-related specifications were deleted.
Furthermore, instead of shortening the prompt,
where
who
what they are doing
What kind of atmosphere it is
I made sure to write it as concretely as possible.
Then, the nonsensical subtitles that had been appearing frequently almost stopped appearing.
Of course, it hasn't been 100% resolved.
However, at least in my environment, it has improved significantly.
Other reported countermeasures
As for countermeasures reported in the community,
do not make the prompt too short
describe the entire scene concretely
avoid portrait videos
do not pull the camera too far back from the person
use close-up compositions
avoid 2x upscalers in ComfyUI
and so on.
In particular, there were reports that subtitles are more likely to appear when using a composition where the person is slightly pulled back in portrait videos.
By the way, my prompt is made by ChatGPT
Furthermore, in my case, I am not thinking up the prompts from scratch myself.
I usually use prompts created by ChatGPT as a base.
Therefore, I wasn't writing any special prompts; they were very general content.
Considering that subtitles were still appearing even then, I feel it is highly likely that this is a known issue with LTX-2.3 rather than a user error.
Summary
The phenomenon where nonsensical subtitles suddenly appear in LTX-2.3 seems to be a known issue that many users have experienced.
And surprisingly,
the act of writing a large amount of text like 'No Text' to try and erase the subtitles
itself may be counterproductive.
If you are troubled by the same symptoms,
first try reducing the text-related specifications.
And try describing the content and situation of the scene more concretely.
I think these two things are worth trying.
In my case, that alone improved things significantly.