Two ways of showing text
Open delivery means the text is always visible: it is part of the picture, and nobody can turn it off. Closed delivery means the text is separate from the picture, so the viewer can switch it on or off, and in many players choose a language or change its appearance.
The terms come from television, where “closed” captions needed a decoder to display and “open” captions were simply part of the broadcast image. The history is covered in the article on the rise of subtitle options. For a producer today, the question is practical: which way should this project show its text, or should it offer both?
There is rarely a universally right answer. The sections below turn the decision into questions you can work through. None of them guarantees an outcome, and the final choice depends on your audience and your platform.
Question 1: Who is watching, and what do they need?
Think about the actual viewers rather than an average one.
- Viewers who need the text (for example, many deaf and hard of hearing viewers) benefit from text that is reliable and legible. They may also benefit from being able to adjust size or color, which only separate text allows.
- Viewers who do not need the text may find permanent words intrusive, particularly on creative material or when they already understand the language.
- Viewers in noisy or quiet places often rely on text, since sound may be unusable. The article on sound-off viewing looks at how common that situation is.
- Viewers using assistive technology cannot read words drawn into the picture. Selectable text can be read by software; pixels cannot.
If your audience is mixed, closed delivery usually lets each person decide, while open delivery decides for everyone.
Question 2: What does the platform support?
Platform support is often the deciding factor. Some places display separate text tracks well, some only accept a limited format, and some do not support tracks at all. Check what the destination accepts before you plan anything else.
- If the destination supports selectable text properly, closed delivery is usually the more flexible option.
- If it does not, or handles it unreliably, permanent text may be the only way to be sure the words appear.
- If the video will be re-shared, re-uploaded or embedded elsewhere, consider that separate files can be lost along the way while permanent text travels with the picture. This is a real advantage of open delivery for clips that spread beyond your control.
Question 3: How many languages?
One language, one audience: either approach can work. Several languages: closed delivery generally scales better, because one video can carry or accompany several text tracks and the viewer picks one. With permanent text, every language needs its own complete video export, which multiplies storage, checking and distribution work. If you manage many languages in one project, that difference adds up quickly.
Question 4: How often will the text change?
If wording may change, for instance after a review or a name correction, closed delivery lets you replace a small file. Open delivery means re-rendering and redistributing the video. For material that is final and short, that cost may be acceptable. For material that is updated often, it usually is not.
Question 5: How much control over appearance do you need?
Open delivery gives you full control of font, color, position and animation. Closed delivery hands some of that control to the player and the viewer. If a precise visual treatment matters, perhaps for a stylized piece, open delivery fits better. If readability for the widest range of people matters more, the flexibility of closed delivery tends to help, because people can adapt text through their own device settings.
Question 6: What are the accessibility expectations?
Accessibility expectations vary by place, sector and type of content, and they change over time. Some contexts expect text that can be selected, adjusted or read by assistive tools. Do not assume that one approach satisfies a given requirement; check with the relevant authority or a qualified professional. For a wider orientation, see the discussion of accessibility regulations.
A quick comparison
| Consideration | Open delivery | Closed delivery |
|---|---|---|
| Always visible | Yes | Only if switched on |
| Viewer can adjust look | No | Often yes |
| Several languages | One export per language | Tracks or files per language |
| Fixing a typo | Re-render the video | Replace the text file |
| Works where tracks are unsupported | Yes | No |
| Readable by assistive tools | No | Usually yes |
Offering both
Many projects do not choose. A common pattern is to publish a clean master with selectable tracks for players that support them, and a version with permanent text for platforms that do not. The cost is extra export, storage and checking work, and a need to keep both versions in step when the text changes. If you do this, treat the text source file as the single source of truth and generate the permanent version from it each time.
A short checklist
- Write down your main viewers and where they will watch.
- List the platforms and what each supports.
- Count the languages now and in the next year.
- Estimate how often the text will change.
- Decide how much control over the look you really need.
- Note any accessibility expectations that apply, and confirm them with the right people.
- Choose one approach or both, and record the reason, so later teams do not have to guess.
If the answers point in different directions, give extra weight to the viewers who depend on the text and to the platform limits you cannot change. The rest can usually be adjusted.