add subtitles to video
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How to Add Subtitles to MP4 Videos on Mac and Windows

by Brian Fisher

Wanna add a subtitle to your own recordings to create your own movie? Or add a subtitle to a foreign movie for understanding the movie better? It’s quite easy to do the subtitle task with UniConverter. This article will introduce detailed guide to add subtitles to MP4 videos, keep reading to learn more.

Part 1. Best Tool to Add Subtitles to MP4 Videos on Mac and Windows Computer

At the very beginning of the task, something you need to know: not all videos can have subtitle, i.e, if you have some FLV videos, you are unable to attach external subtitles to the video. Those proper video formats for subtitle attachment are MP4, AVI, MKV etc. But with UniConverter, the format limitation is nothing.

Best Video Converter - UniConverter

  • Convert videos between 150+ video and audio formats at 90X faster speed, such as MP4, MOV, WMV, MKV, AVI, FLV, VOB, etc.
  • Add subtitles (.srt, .ass and .ssa) or watermarks and special effects or other features to your videos before converting them.
  • Convert videos from 1,000+ popular online video websites like YouTube, Vimeo, Vevo, Hulu, etc.
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  • Perfectly compatible with all macOS and Windows OS, including macOS 10.7 Lion to 10.15 Catalina, and Windows 10.

How to Add Subtitles to MP4 with UniConverter

Here we provide both video and step-by-step tutorial for your guidance, you can watch the video below to get a rough idea of how to add srt to MP4 video, then follow the detailed instructions to get started.

Step 1. Import the source MP4 files to the Video Converter

Before adding subtitles to MP4, please add the video to the iSkysoft program. To add the source videos, you can drag & drop your files directly to the MP4 converter, or head to Add Files button to load MP4 video files. If you want to add subtitles to the MP4 video in your iPhone, Android phones or other mobile devices, click the drop-down icon beside to directly import from mobile devices.

Note: If you have some videos in FLV, 3GP, AVCHD or other formats which don't support subtitle attaching, you can also use the Mac and Windows UniConverter to add subtitles to the video.

add subtitles to mp4 mac

Step 2. Add subtitle to MP4 video

After importing MP4 video to the converter, you will see three small icon under the thumbnail of the video on the video info bar, click the second or third one to open a pop up window, from where you can turn to the Subtitle tab and add subtitles in .srt, .ass and .ssa to the videos. Now you can embed subtitles in MP4 video by editing it.

how to add subtitles to mp4 mac

Step 3. Choose the output format

You can keep MP4 as your output format or choose other formats. Just open the format list by clicking the Output Format option on the video info bar and customize the output format. There are some optimized presets for popular devices and apps like iPhone 8/X, iPad Pro, iPod, iMovie, HTC, Sony, PSP and more, if you wanna choose your mobile model directly, turn to the Device tab.

add srt to mp4 mac

Step 4. Start the subtitle task

Now return to the main interface and hit on Convert in the video display bar or Start All at the right bottom of the main interface of the video converter, and the rest will be finished automatically. By the way, you can check to get detailed guide on how to add SRT to MP4.

mac add subtitles to mp4

Part 2. How to Add Subtitles to MP4 in Windows Media Player

Have you been looking for away that you want add subtitles to your videos on your computer? You can add subtitles to MP4 in Windows Media player by following these easy steps.

Step 1. Ensure you have downloaded the subtitles on the MP4 file and place them in the same folder on your computer as the MP4 file. The title of the video should be the same to that of the subtitles with the subtitle bearing and extension like .srt.

add subtitles to mp4 in windows media player

Step 2. Now click on the MP4 file on the folder and click on “Play with Windows Media Player.” If you have set Windows Media Player as default player then you can easily double to play it the MP4 file. The subtitles should now be displayed on the MP4 video if not move to step 3.

add subtitles to mp4 windows

Step 3. You can set the media player to display subtitles by going to “Play” on the menu bar. From there, scroll down and select “Lyrics, Captions and subtitles” and then select “On if Available”.

windows add subtitles to mp4

Step 4. Play again your MP4 file on Windows Media player and the subtitles will be added to the MP4 file.

Tip 1: What are the subtitle files(.srt, .ass and .ssa)?

Do you want to add a subtitle to your MP4 video file? If you are looking for a hassle-free solution then you have come in the right spot. You just need to acquire some good tips and the right software. First of all let us give you an overview about each of its relevant subtitle file extensions.

SRT- This files is commonly known as SubRip. It is a software program for windows which extracts (rips) subtitles from MP4 videos and includes the time of each subtitle followed by the text of its subtitle. It is used by several video playback programs. It supports DivX, DVD and other video formats. It does not contain any video data.

SSA- Substation Alpha Subtitle file was developed by a developer named Kotus. It is a saved text format which can also be viewed in a text editor.

ASS- Aegisub Advanced Substation Alpha file (.ass) is a subtitle file created by Aegisub which is a cross-platform video typesetting application. It stores the subtitle by using the Advanced Substation Alpha syntax which is mainly used for storing edited movie subtitles of MP4 videos.

Tip 2: How to create SRT, SSA, and ASS files?

SRT file format is a commonly used subtitle format as it supports wide range of media players. It does not contain any video format as it is a text file for displaying the subtitle while streaming any video. Creating a srt file is simple and you don’t have to download any software for this purpose. You could simply use a notepad or text editor for this purpose. If you want to include any subtitle like .srt, .ssa or .ass just follow these simple steps.

Step 1: Open the Notepad > Click "Start" > Go to "All Programs" > Accessories > Notepad

Step 2: For creating an .srt file divide each subtitle phrase separately into sections by numbering them. Just type "1" and then click "Enter" to create the subtitle phrase.

Step 3: To display the subtitle phrase enter the Time span. If you want the subtitle phrase to be displayed from the third minute of the video then type "00:03:00 00:04:00" and then click "Enter".

Step 4: Now create the first subtitle phrase by typing the subtitle phrase and click "Enter".

Step 5: these steps in the same way by typing "2" for second subtitle, "3" for third subtitle and so on to create the subtitle phrase. Separate the subtitle phrase into numbered sections like this.

Step 6: After creating the entire subtitle phrase save the file in SRT format. Click "Start" > "Save". Then go to "Save as type" > select "All Files" from the drop down menu.

Step 7: Then type a file name in the "File name" field and type ".srt" > Click "Save".

Related Articles & Tips

This article introduces 3 easy ways to extract subtitles from DVD, read it and then you may select the right on for yourself.
In this article, you can find the easy-to-use MKV subtitle extractors, so read on and pick the right one for yourself.
This article introduces the easy steps to add subtitle in VLC, and also to add subtitles to video with the best VLC alternative-UniConverter 13!
In this article, you can find the best M2TS subtitle tool and the easy steps to extract M2TS subtitles. Good M2TS subtitle downloaders can also be found here.

Brian Fisher

staff Editor