Subtitles for Overseas Ad Placements
When the same asset must serve several overseas placements, subtitles are usually the first sacrifice. Different placements crop differently, overlay UI differently, and expect subtitles differently. Shoot without margin and the edit gets hard-cropped, hard-squeezed, and information leaks away anyway. Three threads — safe area, per-cue timing, multilingual versions — for how to shoot and how to leave room.
Safe area: leave room for crops and UI
Ad assets routinely get cropped by different placements (square, vertical, horizontal conversions) or overlaid with platform UI. Standard practice: pull key content and subtitles into the central safe area with margin on every side — keep the subject and subtitles away from edges so crops and overlays can't take them; place subtitles lower-middle but off the bottom, clear of likely CTA zones; crop ratios differ by placement, so when in doubt leave more than you think you need. More margin up front means more room at edit time — the cheapest possible insurance.
Self-check: crop the final cut to each target placement's dimensions and confirm subtitles and subject still sit inside the frame. Centering the subject with margin while shooting beats rescuing it in post by a wide margin.
Per-cue timing: match reading speed
Display time must match the character count, or viewers don't finish reading. This site's checker thresholds:
- Chinese: max 18 characters per line, reading speed under 9 chars/second
- Latin: max 42 characters per line, at most 2 lines, under 20 chars/second
- 1–7 seconds per cue
Ad pacing is fast, so cues skew short and toward the lower display bound; splitting long sentences into two cues communicates better than shrinking the font. Different languages render at different lengths — the frame must hold the longer version, so reserve space for the wider language when laying out.
Before the final cut, run the subtitle checker to flag overlong and overspeed cues; a wholesale timeline offset slides with the timeline shift tool.
Multilingual versions: one master, many outputs
One script, several language markets — the right order is a clean subtitle master first, then translate and produce per language: translate the source subtitles with the SRT translator (20 languages including Chinese, English, Japanese, Korean); produce a burned cut per language, or hand each platform its subtitle file; burned versions serve shares and muted scrolling, subtitle files serve searchable hosting.
For the complete overseas subtitle pipeline, see the video localization checklist. For cost estimation, see what subtitle translation costs.
Leave room at shooting time, not in post
Most post-production problems trace back to a full frame at shoot time: nowhere for subtitles, subject hugging the edge and getting cropped. Compose with the subject centered and safe margins all around; leave pauses in the voiceover for later cue-splitting and bilingual layout; decide the placement ratios first, then choose landscape or vertical.
SmileSub takes a video or audio upload, recognizes speech into subtitles automatically, translates into multiple languages and burns the final cut — the toolset covers the chain from recognition to export.
Typical ways subtitles get cropped
Three situations dominate: square placements crop a vertical frame's sides — edge-hugging subtitles get cut, centering survives; horizontal-vertical conversions move every subtitle position — shooting with margin holds up; multilingual versions run wider — reserving space for the wider language keeps the narrower ones from crowding.
None of these fully recover in post. Margin at the source costs less.
Quick parameter setting
List the target placements and set safe margins and aspect ratio per placement — don't reuse one set; try one version at 1/26 of frame height, crop it to each target size, and check it stays in frame; once the multilingual master is laid out, each language swaps text only — never touch the timeline.
FAQ
How much safe area do ad subtitles need?
No universal number — it depends on each placement's crop ratio. Standard practice: subject and subtitles centered, margin all around, erring generous. Cropping the final cut to each placement's dimensions is the more reliable self-check.
How long does one subtitle stay on?
1–7 seconds per cue, tied to character count: Chinese under 9 chars/second and 18 per line, Latin under 20 chars/second and 42 per line. Ad pacing is fast, so skew short.
What's the efficient way to make multilingual versions?
Build one clean subtitle master, translate it into each language with the SRT translator, then produce a cut or a subtitle file per language. Never rebuild the timeline from zero per language.