Video Has No Subtitles? How to Generate Them Yourself

When a video has no caption track at all—whether it's an old upload with disabled captions, a video from a platform that doesn't support subtitles, or your own recording—you can still generate subtitles yourself. This guide walks you through the workflow: saving the video locally, running speech-to-text to produce an SRT or VTT file, and reviewing accuracy for proper names and jargon. For a broader overview of subtitle options, see our complete guide to downloading subtitles.

Why Videos Lack Subtitles

Videos may lack subtitles for several reasons: - Captions disabled by the uploader: On YouTube, creators can choose to disable community contributions or auto-captions. As explained in YouTube's help article on adding subtitles, uploaders must enable captions for viewers to see them. - Non-YouTube platforms: Vimeo, Dailymotion, TikTok, and other sites often do not provide automatic captioning. For example, TikTok's auto-captions are only available for certain languages and may be absent from older uploads; see our guide on getting subtitles from TikTok for platform-specific steps. - Your own recordings: If you recorded a lecture, interview, or meeting, there may be no caption track at all. - Age of the upload: Older videos may have been uploaded before automatic captioning was available, or the creator never added them.

For a deeper dive into why some YouTube videos have no subtitles, read the blog post on why YouTube videos lack subtitles.

Step 1: Save the Video Locally

Before you can generate subtitles, you need a local copy of the video file. Use OrbitDownloader to download the video in its highest available quality:

1. Copy the video URL from the platform (YouTube, Vimeo, Dailymotion, etc.).
2. Paste the URL into OrbitDownloader (use the YouTube Downloader for YouTube, Vimeo Downloader for Vimeo, or Dailymotion Downloader for Dailymotion).
3. Select the video format (MP4 or WebM) and resolution (preferably 1080p or higher for best audio quality).
4. Download the file to your computer.

If you only need the audio track for transcription, you can download the audio separately (e.g., MP3 or M4A) to save space. However, a full video file is useful for later reviewing subtitles in context.

Note: Always respect copyright and the creator's rights. Download only content you own, have permission to use, or that is explicitly allowed for offline access under the platform's terms.

Step 2: Run Speech-to-Text to Generate an SRT or VTT File

With the video saved locally, use a speech-to-text tool to generate subtitle files. The generate subtitles tool at transcript.you accepts video files and outputs SRT (SubRip) or VTT (WebVTT) formats. Both formats are widely supported:

Feature	SRT	VTT
File extension	.srt	.vtt
Timestamp format	00:00:01,000 --> 00:00:04,000	00:00:01.000 --> 00:00:04.000
Styling support	None (plain text only)	Supports CSS styling (color, font, position)
Compatibility	Universal (media players, editors)	Web standards (HTML5 video, YouTube)

For most purposes, SRT is the safest choice. If you need styled captions for web use, VTT is better. The video to SRT converter can also directly convert your video file to an SRT subtitle file.

To generate subtitles: 1. Upload your video file to the generate subtitles tool. 2. Select the language of the audio (e.g., English, Spanish, French). 3. Choose output format (SRT or VTT). 4. Click "Generate" and wait for the transcription to complete. 5. Download the resulting file.

Step 3: Review and Edit for Accuracy

Speech-to-text is not perfect. Accuracy depends on several factors: - Audio quality: Background noise, low volume, or echo can reduce accuracy. - Accents and dialects: Non-native speakers or regional accents may be misrecognized. - Music and overlapping speakers: Songs, sound effects, or multiple people talking simultaneously confuse the engine. - Jargon and proper names: Technical terms, brand names, and personal names often need correction.

The W3C WCAG 2.2 guidelines on captions emphasize that captions must be accurate and synchronized. For accessibility, you should correct: - Spelling of names (e.g., "John Smith" instead of "Jon Smith"). - Technical terms (e.g., "API" instead of "A.P.I." or "apee"). - Grammar and punctuation to match spoken intent.

Use a subtitle editor to review the file. Our guide on how to edit an SRT file and add subtitles to a video covers the process in detail, including tools like Aegisub or Subtitle Edit. For each line, listen to the corresponding audio segment and correct the text. Adjust timestamps if the sync is off.

Handling Common Issues

• Overlapping speakers: Split a single subtitle line into two lines using - or separate cues. For example: 00:00:15,000 --> 00:00:18,000 Speaker 1: Hello. Speaker 2: Hi there.
• Music or sound effects: If the audio includes non-speech sounds, consider adding sound cues like [music] or [applause] in brackets, as recommended by accessibility standards.
• Long silences: Remove or merge cues that contain only silence or noise.

Step 4: Add Subtitles to Your Video

Once the SRT or VTT file is ready, you can embed it into the video or use it as a separate track: - YouTube: Upload the SRT file via YouTube Studio > Subtitles > Add subtitles. YouTube accepts both SRT and VTT. - VLC or other media players: Load the SRT file as a subtitle track (Subtitle > Add Subtitle File). - HTML5 video: Use a <track> element with the VTT file, as defined by the WebVTT standard. - Video editing software: Import the SRT file into Adobe Premiere Pro, DaVinci Resolve, or similar, and render subtitles into the video.

If you need to convert between formats, our comparison of SRT vs VTT vs TXT explains the differences and how to choose.

Automating the Process for Multiple Videos

If you have many videos without subtitles, consider batch processing. The transcript.you generate subtitles tool supports multiple uploads. For each video, you'll still need to review the output for accuracy, but the generation step can be automated.

For videos where you only need a transcript (not timed subtitles), the guide on getting a YouTube transcript without subtitles offers alternative methods.

Final Thoughts

Generating subtitles for a video without a caption track is a straightforward process: save the video, run speech-to-text, review and edit, then add the subtitles. The quality of the output depends heavily on the audio clarity, so for best results, use a clean recording with minimal background noise. By following this workflow, you can make any video accessible to a wider audience, including those who are deaf or hard of hearing, as required by WCAG standards.