Captioning & subtitling

Vertical Video Subtitles (9:16, UI-Safe)

Short-form vertical video lives or dies on watch-through, and a caption buried under the interface costs you the view. I caption 9:16 video so every line sits clear of the Like, Share and native-caption UI, styled to match your channel, and delivered as SRT, VTT or a ready-to-post burn-in, usually within 24 hours.

✓ 24 hour turnaround✓ Clear of the platform UI✓ SRT, VTT or styled burn-in
Dao Huy (Lucas)

Dao Huy (Lucas)

Subtitle & caption specialist, Da Nang, Vietnam

BA in EnglishIELTS 7.0HSK 5Upwork Top-Rated Plus4.99/5 from 80 reviewsTop 1%7+ years, 200+ projects
Recently delivered English SDH for six episodes (around 160 minutes) with true CEA-608 and CEA-708 embedded and independently QC-verified, for a US media-localization agency.

Three short lines sitting clear of the app UI.

status baraction railnav / caption barcaption safe
The one band a caption can sit in, clear of the status bar, the action rail and the nav bar.
01 Caption languages

Social captions into native Vietnamese, plus English, Chinese and French. Short, punchy lines tuned to how people read on a phone.

VietnameseNative
EnglishFluent
ChineseProfessional
FrenchWorking
02

Your platform, matched to a format

Tell me where it publishes, and I deliver the file that platform expects.

PlatformFormatNote
TikTok, Reels, ShortsBurned-in 9:16Styled, UI-safe
YouTube (long)SRT, WebVTTToggleable
Podcast videoSRT + chaptersSearchable
Web embedWebVTTAccessible
03

Why vertical captions get hidden

On a phone the caption fights the app UI, not just the picture. These are the collisions I design around.

Captioned in a flat editor
In the app UI
01Caption sits at the very bottom
The native caption bar and progress hide it. I lift it into the clear band.
02Caption runs to the right edge
The like and share rail covers it. I keep it clear of the action rail.
03Tiny, low-contrast text
It vanishes on a busy shot. I use a legible size with a safe backplate.
04One long line
It wraps and covers the shot. I keep lines short and punchy.

What you receive

SRT and WebVTT caption files
Styled 9:16 burn-in MP4, ready to post
On-trend style presets to match your channel
1:1 and 16:9 versions on request
Quick 2 to 4 hour revisions

Spec checklist

✓9:16 vertical, captions clear of the UI rail
✓Reading speed CPS 15 to 17
✓Style presets: clean, bold, word pop, karaoke highlight
✓SRT, VTT or styled burn-in
✓Turnaround 24 hours standard
✓Revisions in 2 to 4 hours

Toolchain

  1. Style

    Built withAegisub
    Compatible withCapCut · Adobe Premiere Pro

  2. Burn-in

    Built withFFmpeg
    Compatible withAdobe After Effects

  3. QC decode

    Built withSubtitle Edit
Standards
9:16 UI-safe zonesCPS 15-17SRTWebVTTWCAG

How it works

1

Scope and spec

You send the video and target profile. I confirm frame rate, timecode, caption style and the delivery formats you need.

2

Author

I time and write the captions or subtitles to the reading-speed, line-length and positioning rules for the target.

3

Encode and wrap

I produce the deliverables: SCC, MXF OP1A embed, SMPTE ST 2052-1 or DCP XML, plus a burned-in preview.

4

QC and deliver

I decode the result independently with caption-inspector, fix anything that drifts, and deliver with a report.

Three steps, done in a day

No long back-and-forth. Send, pick, receive.

1. Send the link

Drop a video link or upload the file, and tell me the platform.

2. Pick a caption style

Choose an on-trend style preset, or send a reference to match.

3. Get the file

Receive SRT, VTT or a styled burn-in, usually within 24 hours.

Quality promise: 100% of captions sit clear of the platform's Like, Share and native-caption UI, never covered.
✓Quick revisions in 2 to 4 hours.
✓From $2 per minute, with a per-video or monthly package on request.

Indicative rate

From $2 / minute, or per-video package on request

✉ Request a quote

Related captioning services

Captioning & subtitling →Closed Captions →SDH Captions →DCP Subtitles →Subtitle Translation →Caption QC →Vietnamese translation →

Frequently asked questions

Will the captions be covered by the app buttons?

No. I place every line clear of the Like, Share and native-caption UI, so captions stay fully readable on YouTube, TikTok and Reels style layouts instead of hiding behind the interface.

How fast is delivery?

Usually within 24 hours for a single short-form video, with quick revisions in 2 to 4 hours. Monthly and volume packages keep a steady turnaround for a content schedule.

What does it cost?

From $2 per minute, with a per-video or monthly package on request. Send a link, tell me your volume and the style you want, and I send an exact quote.

What formats do I get?

SRT and WebVTT for platforms that read them, or a styled 9:16 burn-in MP4 ready to post. YouTube, TikTok and Reels map to SRT, VTT or burn-in.

✉ Request a quote

⏱ Typical response within 10 minutes

Get QuoteWhatsApp