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The Ultimate Guide to Convert VTT Files to MP4 Videos for Free
Posted by Aira Lesly Escoto to Convert Video Apr 30, 2025
“I want to watch videos with subtitles on my phone, but the .vtt file doesn’t show up. How to merge a .vtt file and a .mp4 file?”
-from Reddit
Understanding Videos with Subtitles Converting VTT files to MP4 can help you get a more complete understanding of the video content. VTT subtitles can effectively improve the accessibility and comprehension of videos. Nevertheless, VTT files are widely used in online videos and are not always supported by local video players. Therefore, it’s a challenge to play MP4 videos with VTT subtitles. However, this post will provide you with feasible solutions.
Guide List
What’s VTT Files for MP4 Playback How to Display VTT Files for MP4 Videos The Best Way to Convert VTT to MP4 How to Convert VTT Files to MP4 OnlineWhat’s VTT Files for MP4 Playback
VTT (Web Video Text Tracks) is a subtitle format used primarily for web-based video playback, such as on platforms like YouTube and Vimeo. As lightweight text files, VTT files contain time-coded captions, subtitles, or descriptions that are synchronized with the video content, making them highly adaptable to online streaming services.
However, while VTT files excel in web environments, they face compatibility issues with local media players and offline playback. Most standard video players, such as Windows Media Player or some mobile video apps, do not natively support VTT files. Instead, they rely on more widely accepted subtitle formats such as SRT (SubRip subtitle) or prefer subtitles embedded directly into MP4 video files.
This limitation means that simply placing a VTT file together with an MP4 video file may not display subtitles during offline playback. To ensure that subtitles are visible while watching 4K movies, you usually need to merge or hard-code VTT subtitles into the MP4 video file. This process makes subtitles permanently visible and eliminates compatibility issues between different devices and platforms.
How to Display VTT Files for MP4 Videos
When it comes to playing MP4 videos with VTT subtitles, PotPlayer stands out as one of the most reliable and user-friendly media players. PotPlayer has become the first choice for many video lovers to watch videos locally with its versatile format support and customizable subtitle options. It allows you to display VTT subtitles directly on the video while watching MP4 videos without any complicated settings, effectively solving the difficulty of adding text to your videos.
Generally speaking, if you give the VTT file the same name as the MP4 file and place it in the same folder, PotPlayer will automatically detect and display the VTT subtitles. If the subtitles don't show up right away, you can manually enable them by adding VTT files to the MP4 playback process as follows:
Step 1Launch PotPlayer and import your MP4 videos for playing.
Step 2Right-click the PotPlayer, click the “Subtitles” and the “Add/Select Subtitles” button.
Step 3Click the “Add Subtitles...” button to choose your VTT files for the video on the folder.
PotPlayer supports subtitle customization, which allows users to adjust font size, color, positioning, and synchronization to ensure that subtitles are perfectly aligned with the video. This way, you can adjust VTT subtitles to the format that best suits your MP4 video. However, while this method works seamlessly for desktop playback, it does not embed subtitles directly into MP4 files. For sharing or universal compatibility, you may need to merge or hard-code VTT subtitles into your MP4 video, which will be introduced in the next section.
The Best Way to Convert VTT to MP4
If you want to merge or convert VTT subtitles to MP4 videos so that they can be embedded for later viewing, then you need a powerful tool. 4Easysoft Total Video Converter is undoubtedly an option worth considering. Whether you want to add existing VTT subtitles to your videos or create your own subtitles from scratch, it provides an all-in-one solution with seamless integration.
With 4Easysoft Total Video Converter's extremely detailed adjustments, you can easily load your MP4 videos and VTT subtitle files, preview the final output, and fine-tune subtitle settings such as font style, size, color, and positioning before exporting your video. Even if you are a complete beginner, you will find it surprisingly easy to operate. In addition, the subtitle creation tool also allows you to customize and edit subtitles directly. This is especially useful if your VTT file needs corrections, or if you want to add new subtitles to the video.
Ultra hardware allows you to convert AV1 to MP4 in less than a second.
Enjoy streaming online videos on local player after converting AV1 to MP4.
Enable you to edit the video effects to have a better watching experience.
Provide high-quality and small-size MP4 files converted for easy sharing.
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Step 1Launch 4Easysoft Total Video Converter and click the “Add Files” button to import your MP4 file.
Step 2Click the “Edit” button to import and adjust your VTT subtitles for the MP4 video.
Step 3Under the “Subtitle” tab, click the “Add Subtitle(s)” button to import the VTT file for the MP4 video.
How to Convert VTT Files to MP4 Online
Happy Scribe is a great option for those who prefer an online solution for adding VTT subtitles to MP4 videos without having to download additional software. Happy Scribe allows users to embed VTT subtitles directly into MP4 videos on a web page. You can simply upload your MP4 file, add your VTT subtitle file, and preview the subtitles before exporting the final video. Conveniently, Happy Scribe supports customization options such as adjusting font style, size, and positioning, allowing you to tailor the subtitles to match your video aesthetics.
Happy Scribe does have some limitations, though, such as a file size limit that may make it unsuitable for larger videos. Conversion speeds also depend on internet bandwidth, and slow connections may cause delays. Still, Happy Scribe is a handy and efficient tool for quickly embedding VTT subtitles into MP4 videos, especially for users looking for a hassle-free, browser-based solution.
Conclusion
Converting or merging VTT subtitles with MP4 videos ensures seamless playback across different devices and platforms. You can either use a player that supports the VTT subtitle format, or you can choose to convert the VTT subtitles into the MP4 video. If you need a tool that is as comprehensive as possible, you can download 4Easysoft Total Video Converter for free, which ensures that you can get the subtitle of the VTT file when watching MP4 videos.
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