---
title: Captions, Trickplay, and Advertising
menu_group: Content editor
menu_order: 60
tab: Captions / Trickplay / Ads
tab_order: 30
summary: Closed captions, BIF trickplay files, validity dates, and per-video ad breaks.
---

# Captions, Trickplay, and Advertising Metaboxes

These metaboxes appear on video posts when **Enable Legacy Controls** (Legacy Controls section on General Settings) and the specific Meta Controls sub-options are on. See [General Settings → Legacy Controls](general-settings.md#legacy-controls).

## Closed Captions / Subtitles

**Metabox:** Closed Captions/Subtitles

Add repeatable caption tracks:

| Field | Description |
|-------|-------------|
| **File URI** | URL to `.vtt` (WebVTT) or `.srt` file. WebVTT works on Roku and HTML5; SRT is Roku-only. |
| **Language** | BCP 47 language code (e.g. `en`, `es`). |
| **Type** | CLOSED_CAPTION or SUBTITLE |

Convert SRT to VTT with online tools if needed for cross-platform support.

## Trickplay (deprecated)

**Metabox:** Trickplay — **Deprecated in 3.0.0**

BIF trickplay files enable scrub preview thumbnails on Roku:

| Field | Description |
|-------|-------------|
| **BIF file URI** | URL to `.bif` file |
| **BIF definition** | HD or FHD resolution |

Avoid new BIF workflows unless maintaining legacy Roku channels.

## Advanced Controls

**Metabox:** Advanced Controls

| Field | Description |
|-------|-------------|
| **Validity start date** | Content available from this date |
| **Validity end date** | Content expires after this date |

Useful for licensed content windows and live-event replays.

## Advertising Controls

**Metabox:** Advertising Controls (not shown on Series posts)

Configure per-video ad breaks when feed ad type is **Scheduled** or **Scheduled w/ Automatic Fallback** (from prior configuration or JSON import).

| Field | Description |
|-------|-------------|
| **Ad breaks** | Repeatable cue points (time offsets) |
| **Custom mid-roll timer** | Override default mid-roll interval for automatic modes |

## Enabling these metaboxes

1. **General Settings → Enable Legacy Controls** — on
2. Enable the specific control: Subtitles, Trickplay, Advanced, or Advertising

## Related guides

- [General Settings](general-settings.md)