SRT 文件指南：如何在视频中创建、编辑和使用字幕

An SRT file (SubRip Subtitle file) is a plain text file that stores subtitles as numbered blocks, with each block pairing a start and end timestamp with the caption text that appears on screen between them.

Millions of people watch videos with the sound off every day. Verizon was one of the first companies to report on this behavior in 2019, when it found that 69% of polled users in the U.S. turned the sound off on videos in public spaces. It also found that 80% of consumers were more likely to watch an entire video when it had captions. A 2024 study cited these findings from Verizon and confirmed that they still hold true.

It’s no wonder that both individual content creators and big media teams prioritize captions on everything from social media videos to ads and movies. 

You can use ElevenCreative to produce studio-grade audio, automate caption workflows, and add subtitles to a video in seconds. This not only boosts engagement but also makes videos more accessible for people who are hard of hearing or deaf and people who speak different languages.

This guide shows you how to use the SRT file format to create, edit, and add subtitles to your videos. You’ll also see how the SRT file format works, learn how to open the format on any device, and figure out when to choose between SRT and WebVTT.

Summary

• Content creators use the SRT file to quickly add subtitles to a video and reach global audiences across media platforms.
• The SRT file format stores plain text captions paired with start and end timecodes in a simple numbered sequence.
• Each subtitle is a numbered block that includes a sequence number, a timestamp range, and the text itself, separated by a blank line between blocks.
• AI-powered speech to text models convert spoken audio into accurate captions with word-level timestamps and speaker labels.
• Publishers choose between the SRT and WebVTT file formats based on platform capability and web styling needs.
• Most video players and editing software support SRT natively or can import it alongside a video file.
• Content teams can edit SRT directly because it is plain text, but a dedicated editor makes catching timing errors easier than manual edits.

What is an SRT file?

A SubRip Subtitle (SRT) file is a plain-text subtitle format that pairs blocks of text with start and end timestamps. This lightweight file tells a video player exactly what captions to display on screen and when. Creators and media teams use the SRT file format to add subtitles to videos distributed across publishing channels.

The SRT file format is widely supported and works independently of any single proprietary tool. As a direct result of this, most tools open and parse these files easily. Major streaming platforms and media players also have the built-in ability to process them. This makes it easy to add subtitles to your videos without getting locked into proprietary software.

How the SRT file format works

The SRT file format structures subtitle tracks into a clean sequence of numbered blocks. Each block contains three core components that control how captions sync with video playback. A single blank line separates each subtitle entry from the next block in the file.

A numbered index opens each block to define its order in the timeline. Underneath this index, a timestamp line specifies the precise start and end times for displaying the corresponding text. The plain text caption appears directly under the timecode line before a blank line marks the end of that block.

SRT file example: sequence numbers, timestamps, and subtitle text

Reviewing a real example of two formatted blocks clarifies how sequence numbers, timestamps, and text blocks align within an SRT file:

1

00:00:01,000 --> 00:00:06,000

Welcome to another adventure in the forgotten villages of rural Spain.

2

00:00:06,500 --> 00:00:10,200

Every village has its unique traditions that have barely changed in hundreds of years.

The blank line between the two blocks marks where one caption ends and the next begins.

The timestamp line requires exact formatting in the HH:MM:SS,mmm structure. Format hours (HH), minutes (MM), and seconds (SS), separated by colons, and then a comma before the milliseconds (mmm). Failing to follow this format is a common source of captioning errors.

How to open SRT files on any device

Most video players and editing software have native support for opening the SRT file format, eliminating the need for extra plugins. Follow these steps to open SRT files in most text editing or video playback tools across just about any device:

1. View the file in a text editor: Right-click the SRT file and choose a text editor to review or adjust the raw text and timecodes. (Find details on how to edit and make adjustments below.)
2. Play the subtitle track alongside the video footage: Save the subtitle file in the same folder as your video file by using an identical filename to display captions automatically during playback.
3. Import the subtitle file into editing software: If you’re happy with the timing and text, drag the caption file into your video editing application to add subtitles to your video project as a separate subtitle track.

Create subtitles from a transcript with a TXT to SRT converter

A TXT to SRT converter adds start and end timestamps to plain text and turns it into numbered subtitle blocks that a video player can display. A plain text file has no timing information, which means the timestamps have to come from the audio itself. ElevenCreative uses an automated speech to text workflow to generate them.

Plain text on its own has no timing, which means the conversion depends on where the timestamps come from. If you already have a transcript, you can type the timecodes into each block by hand, which works for short clips. For anything longer, run the original recording through speech to text and let the model generate the words and timestamps together.

Here’s how to generate and export your SRT file from the transcript of your video or recording:

1. Upload your media file: Go to the Speech to Text page in the dashboard and select Transcribe files to upload your recording.
2. Configure transcription options: Choose the primary language or select Detect for automated selection across multiple languages in the recording. 
3. Customize transcription settings: Enable keyterm prompting or toggle audio event tags to refine accuracy for more industry-specific jargon (e.g., medical or cybersecurity terms) and non-speech sounds (e.g., a dog barking).
4. Export as SRT: Review the transcript, select Export in the top right, and choose SRT from the available formats.

Creators can also access the no-code export path on the speech to text playground to convert transcripts directly in the browser.

How to edit subtitle files and fix timing errors

Learning how to edit subtitle files keeps your video captions synchronized with spoken dialogue. Creators with this skill can modify text lines, adjust timestamps, and refine line lengths directly using just the plain text file or browser-based subtitling tools.

Common fixable subtitle issues

Subtitle tracks often have noticeable timing and readability errors. Knowing the most common errors can help you catch them before they become a post-production nightmare. 

Common issues to look out for include:

• Timestamp drift: Captions don’t match the spoken audio by appearing either too early or too late.
• Excessive line lengths: Subtitle lines contain too many characters for a person to read comfortably in the time they’re displayed on screen.
• Overlapping timestamp ranges: Caption blocks that follow each other overlap start or end times, which creates display errors.

Subtitle editing process

The editing process is a simple final step for polishing your recording for publishing. You can use the following steps to get started:

1. Open the subtitle file. Import your SRT file into a standard text editor or a specialized subtitle tool to view timecodes and text blocks.
2. Adjust timecodes and text. Adjust start and end timestamps to correct drift and split long sentences into readable lines.
3. Verify synchronization and export. Play the video concurrently with your updated caption track to verify timing and save your changes.

For longer videos, a dedicated SRT editor makes timing fixes faster. It shows the video preview next to the timecodes, which lets you spot drift and overlaps as you edit.

How to add subtitles to a video with an SRT file

Attaching an SRT file to your video project is also a simple process.

Choose one of these three options, depending on where the video will be shown:

1. Prepare your video and caption files. Put your video and SRT file in the same folder using identical filenames to enable automatic subtitle playback.
2. Upload the subtitle track to your publishing platform. Choose the option to attach closed captions in your platform settings and upload your SRT subtitle track.
3. Burn captions directly into the video stream. Import your caption file into a video editor to render text permanently into the footage for playback across virtually any platform or device.

SRT vs. WebVTT: choosing the right subtitle file format

Choosing the right subtitle file format comes down to where you publish your video content.

An SRT file is the most widely supported format, so it’s still used across desktop players, legacy media platforms, and offline editing applications. Its plain-text structure gives content creators maximum compatibility without the need for specialized software to load or preview text files.

However, WebVTT is the newer web standard designed specifically for HTML5 web video players. Unlike the basic SRT file format, WebVTT supports additional features like advanced text styling, font colors, and custom screen positioning. These features make it a better choice for web-first video distribution and HTML5 web players where positioning and visuals matter.

ElevenCreative supports both subtitle export options directly from our speech to text transcription workflow. You automatically generate your timed transcript and export it as an SRT or WebVTT file in seconds. This makes it easy to pick the file format that best matches your target player, audience, or use case.

Get started with ElevenAPI to generate subtitle files at scale

Developers and engineers use ElevenAPI to automate subtitle generation across high-volume video workflows. The ElevenLabs Scribe v2 model transcribes audio in over 90 languages and delivers word-level timestamps directly into your app. The system instantly converts spoken audio into structured captions, which eliminates manual data entry.

Automating subtitle pipelines speeds up media distribution, especially for time-sensitive content. It also ensures precise timecode synchronization for a professional and accurate finish across worldwide platforms.

Read our speech to text cookbook to view code samples and start building your subtitle pipeline. You can also generate an API key in your developer dashboard to add subtitles to a video at scale. Alternatively, sign up for ElevenCreative to use the subtitle generator today.

Frequently asked questions about SRT files