It is possible to actually turn video subtitles to a synthesized speech with the help of a dedicated text to audio tools, in order to create dubbing of sorts. Your best option in this case is Balabolka that can be used not only to generate the speech from subtitles during playback, but also save the output in its own track, which is what vtt to mp4 conversion in essence represents.
Home > Search converters: vtt to mp4
Conversion of vtt file format to mp4 file format beta
Search for vtt to mp4 converter or software able to handle these file types.
Convert WebVTT subtitle format to MPEG-4 video file format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software 
- convert vtt to mp4 on Windows
Balabolka
A text-to-speech software
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from vtt file | No | No | No | No | No | Yes | No | No |
to mp4 file | No | No | No | No | No | No | Yes | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open vtt file, Open mp4 file
VTT
Files with vtt extension are related to the WebVTT format used to store subtitles, chapters and other related metadata for Internet videos.
MP4
An mp4 file extension is typically used for MPEG-4 multimedia files defined by ISO 14496-1 standard. Commonly used for video and movie files and supported by vast number of media players.
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