Convert M4V to captions

Sonix transcribes your M4V file and creates closed captions that make your content accessible to everyone.

ADA compliant
5-min turnaround
Accessible
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding M4V files

What is a M4V file?

Apple's video format with optional DRM protection

M4V files were developed by Apple and are very similar to the MP4 file format. However, a file with the M4V file extension is called an iTunes Video file (MPEG-4 video file). Some of the M4V files that you’ll encounter may have DRM copyright protection to prevent unauthorized distribution and copying of the video. These files are typically downloaded from iTunes. You can try uploading them to Sonix and we’ll only be able to transcribe M4V files that do not have DRM protection.

Common Uses

  • iTunes movie purchases
  • Apple TV content
  • iOS video playback

Audio Quality

High quality video and audio, similar to MP4

Transcription Tips for M4V

  • DRM-protected files cannot be transcribed
  • Unprotected M4V files work excellently

Where M4V Files Come From

  • iTunes Store purchases
  • Apple TV+ content
  • iOS video exports
10x
Faster than real-time
Get your M4V captions in minutes
99%
Accuracy rate
Industry-leading AI for M4V files
53+
Languages
Captions in any language
30+
Export formats
SRT, VTT, SCC, and more
How It Works

Create captions from M4V in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your M4V file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes your M4V with word-level timestamps.

Step 5

Edit captions

Fine-tune timing and formatting for accessibility.

Step 6

Export

Download closed captions in SRT, VTT, or SCC format.

Common Questions

Everything about M4V captions

Can you create closed captions from M4V files?

Yes! Sonix transcribes your M4V file with precise timestamps and creates closed captions in standard formats.

What's the difference between subtitles and closed captions?

Closed captions include non-speech elements like [music], [applause], and speaker identification. They're designed for deaf and hard-of-hearing viewers.

Are Sonix captions ADA compliant?

Yes! Sonix captions meet accessibility requirements when properly reviewed and edited. Our editor helps ensure timing and accuracy standards.

What caption formats are supported?

Export captions as SRT, VTT, SCC (for broadcast), and other formats. Each format has specific use cases.

Can I add sound descriptions?

Yes! Use our editor to add [music], [laughter], and other non-speech descriptions for full accessibility.

Do captions help with SEO?

Absolutely! Captions make your video content searchable and improve accessibility, both of which can boost SEO rankings.

Why Sonix

Accessible captions from M4V files

Accessibility First

Create captions that make your content accessible to deaf and hard-of-hearing viewers.

ADA Compliant

Meet accessibility requirements with properly formatted closed captions.

Sound Descriptions

Add non-speech elements like [music] and [applause] for full context.

SEO Benefits

Captions make video content searchable and improve discoverability.

Related

More ways to convert M4V files

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Other file formats

TS to text
MPG to text
VOB to text
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MOV to text
MXF to text
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See all supported file formats
Reviews

Trusted by accessibility teams

4.98 rating from 211 reviews

Easy to use and surprisingly accurate.
JB
Jon B.
Shakopee, MN, USA
I love how accurate the software is! The way you can play audio as you go through the text or click on any part of the text to hear the audio is amazing.
BI
Bruce I.
San Diego, CA USA
I loved how accurate you are even in Dutch!
GP
Gemma P.
East Falmount, MA, USA
Thank you for all of your help with my dissertation!!! Ya'll rock!!
MA
Miranda A.
Houston, TX
The UI experience is fantastic! It's quick and easy to understand. Plus it's web based so I can switch between my desktop and laptop easily.
AL
Andras L.
Budapest, Hungary
You saved me! I got everything done in three days and I was sure it will take me a month.
WO
Wojciech O.
Gandsk, Poland
Impressed at how seamless Sonix makes editing transcripts. This is so much easier and more enjoyable than manually writing an entire transcript myself.
SA
Sean A.
Wellington, New Zealand
The process was super easy. I liked that you can upload video file without stripping away the audio first to do it, this of course saves production time. Great job overall for sure!!!
AS
Aaron S.
San Francisco, CA USA
Read more testimonials
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Create M4V captions now

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