Slideshow

One to ten pictures or videos, each filling the whole frame with a label, a headline and a line over it, the title over the first, giving way to the next with a fade, a cut, a slide, a push, a zoom or a wipe in the direction and at the speed chosen, a picture moving slowly and a video playing: 5 to 33 seconds. In nine styles, each wearing your brand's colours, fonts, logo, presenter and background.

Template id	tpl_2518c80fd3fb
Markets	Every market
Variants	Corporate glass, Bento grid, Broadcast news, Editorial, Swiss grid, Neo-brutalist, Soft friendly, Keynote minimal, Creator native
Ready-made feeds	None

Use cases

• A property's rooms, a new collection, an event or a menu in pictures and videos that fill the whole screen.
• Each picture or video with its own label, headline and line over it, the title over the first.
• How one changes to the next is yours: a fade, a cut, a slide, a push, a zoom or a wipe, quick or slow.

Variants

A variant is this template drawn another way, and it comes in versions: immutable builds, the newest first. A channel follows the newest version of its variant, unless it is pinned to one.

Variant	What it is	Versions	Newest
Corporate glass	Frosted glass cards over an aurora in your brand colours: calm and premium.	1	1.0.0
Bento grid	Rounded tiles in your brand colours, each moving on its own: a modern product look.	1	1.0.0
Broadcast news	A news channel in your colours: channel bug, lower third, ticker and your presenter.	1	1.0.0
Editorial	A magazine page in your paper tone and serif: masthead, hairline rules and a byline.	1	1.0.0
Swiss grid	A strict grid, large type and your brand colour as the one accent. Nothing bounces.	1	1.0.0
Neo-brutalist	Loud flat blocks in your colours with thick borders and hard shadows.	1	1.0.0
Soft friendly	Soft shapes and rounded cards in tints of your brand colour: warm and approachable.	1	1.0.0
Keynote minimal	A launch stage: one thing at a time, huge type and a light sweep in your colour.	1	1.0.0
Creator native	Made in the app: your picture behind text boxes and captions in your colour.	1	1.0.0

What it accepts

Every variant takes the same content, so one document draws in any of them.

Slideshow: one to ten pictures or videos, each filling the whole frame with a label, a headline and a line laid over it, changing the way chosen (a fade, a cut, a slide, a push, a zoom or a wipe) while each moves slowly. The title stands over the first picture. metaData is the post's title, descriptions and hashtags and is never drawn.

Field	Type	Required	Limit	What it is
clipData	group	yes		Clip data: Everything drawn: an optional kicker and title, the pictures with their words, how one picture gives way to the next and how each moves, where the words stand, the credit and the look.
clipData.kicker	text		up to 20 characters	Kicker: A word or two above the title, such as IN PICTURES. Optional.
clipData.title	text		up to 70 characters	Title: The slideshow's title, over the first picture, which is the cover. Optional.
clipData.slides	list	yes	at least 1, up to 10	Pictures: In the order they are shown, each a picture or a video filling the whole frame with its words over it. One to ten, each adding a little over three seconds.
clipData.slides[]	group			Picture
clipData.slides[].picture	video	yes	media:// picture or video from the media library, alt text up to 120 characters	Picture or video: A picture or a video from your media library, filling the whole frame. A video plays without its sound from the moment it comes in, and from the start again if it is shorter than its time.
clipData.slides[].label	text		up to 30 characters	Label: A few words above the headline, such as a place, a date or a price.
clipData.slides[].headline	text		up to 60 characters	Headline: What the picture shows, large over it.
clipData.slides[].line	text		up to 140 characters	Line: One or two sentences under the headline.
clipData.transition	enum		fade, cut, slide, push, zoom, wipe	Picture change: How one picture gives way to the next: a fade, a hard cut, the next one sliding in over it, pushing it out, zooming in or wiping across it.
clipData.direction	enum		left, right, up, down	Direction: Which way the next picture moves as it slides, pushes or wipes in.
clipData.changeSpeed	enum		quick, standard, slow	Change speed: How long the change from one picture to the next takes: about half a second, nearly a second or a second and a half.
clipData.movement	enum		push-in, pull-out, pan, still	Picture movement: How each picture moves while it is on screen: a slow push in, a slow pull out, a slow pan across, or still. A video plays as it was filmed.
clipData.captionAt	enum		bottom, top	Words: Where the words stand over the pictures.
clipData.pictureFit	enum		fill, auto, whole	Picture fit: Fill the frame, the default, has every picture fill the whole frame with its edges cropped. Automatic fills only when a picture is close to the frame's shape and otherwise shows it whole over a soft copy of itself; Show it whole never crops.
clipData.pictureFocus	enum		centre, top, bottom, left, right	Picture focus: Which part of a picture stays in view when it fills its frame and its edges are cropped: the middle, or one side.
clipData.source	text		up to 70 characters	Credit: Who the pictures are by or where they come from, small under the words on every picture. Drawn exactly as written.
clipData.styleWords	group			Style words: The few words some styles write into their own frame, each drawn exactly as written, in the language you write it in. A word left out is not drawn: no template adds a word of its own. The same keys in every format of the collections; each style draws only its own.
clipData.styleWords.live	text		up to 16 characters	Live marker (Broadcast news): Written beside the light in Broadcast news' channel bug, such as LIVE. Left out, the light stands alone.
clipData.styleWords.byline	text		up to 12 characters	Byline (Editorial): Written before the presenter's name in Editorial, such as By. Left out, the name stands alone.
clipData.styleWords.functionKeys	list		up to 4	Function keys (Data terminal): Data terminal's row of keys F1 to F4, one word each, in order, such as HELP, DATA, CHART and NEWS; the second is drawn held down, and a key that does not fit the row is left out. Left out, no keys are drawn.
clipData.styleWords.functionKeys[]	text		up to 12 characters	Key
clipData.styleWords.commandKey	text		up to 10 characters	Command key (Data terminal): The key at the end of Data terminal's row, in the rise colour, such as GO. Left out, none is drawn.
clipData.styleWords.realTime	text		up to 12 characters	Real-time light (Data terminal): Written beside the blinking light in Data terminal's status bar, such as RT. Left out, the light stands alone.
clipData.styleWords.messageLabel	text		up to 12 characters	Message window label (Data terminal): The tab on Data terminal's message window round the presenter, such as MSG. Left out, the window has no tab.
clipData.styleWords.pictureLabel	text		up to 12 characters	Picture panel label (Data terminal): Written in the strip along the top of Data terminal's picture panels, such as IMG. Left out, the strip stays empty.
clipData.look	group			Look: How the clip looks and moves within its style. The same switches in every format of the collections. Leave a switch out, or set it to the style's own, and the style decides.
clipData.look.theme	enum		auto, brand, light, dark, bold	Theme: The style's own choice; your brand's own colours and background; a light or dark page tinted with your brand colour; or your brand colour as the page.
clipData.look.pace	enum		auto, calm, standard, punchy	Pace: How things arrive: the style's own rhythm, calm fades, a standard rhythm, or punchy slams and cuts.
clipData.look.corners	enum		auto, square, soft, round	Corners: The shape of cards, panels and marks.
clipData.look.align	enum		auto, start, centre	Text alignment: Where the text lines up.
clipData.look.logo	enum		auto, free	Logo: The style's own: the logo on the style's plate (a card, a disc, a badge) so it reads on any page. As it is: the logo whole, with no plate, frame or crop, for a logo made to stand on the page, such as one with a transparent background. As it is, make sure your logo reads on the page of the theme you choose.
clipData.look.logoSize	enum		auto, small, large	Logo size: Standard is the style's own size. Small draws the logo a fifth smaller, with its plate. Large draws it a quarter larger wherever the style has room for it, and at the standard size where it has none.
clipData.look.hideHeader	boolean			Hide logo and title: Leaves out the line at the top of the clip: your logo, the title line and the style's decoration around them, so the content starts at the top. To leave it out of every clip, switch Logo and title line off in your brand's settings.
clipData.look.hideFooter	boolean			Hide footer line: Leaves out your footer line at the foot of the clip, with whatever the style draws only to carry it, so the content reaches further down. Your presenter and the source line stay. To leave it out of every clip, switch Footer line off in your brand's settings.
clipData.look.pattern	enum		auto, none, dots, grid, lines	Background pattern: The fine texture behind the content. The style's own keeps what the style draws there, and some styles draw none. None leaves the background plain. Dots, Grid and Diagonal lines draw that pattern faintly instead, the same in every style, in the colour of your page.
metaData	group			Meta data: Everything about the post that is never drawn in the clip: its title, its description in four lengths, one per kind of platform, and its hashtags. Reelwire adds the brand's description, link and hashtags after it. Left out, the post text is generated from the clip data.
metaData.title	text		up to 100 characters	Title: Used where the platform has a title of its own: Facebook Feed, LinkedIn, Pinterest and YouTube. Up to 100 characters, which every one of them takes.
metaData.captionTiny	text		up to 200 characters	Tiny description (Pinterest, Threads, X): Up to 200 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionShort	text		up to 500 characters	Short description (Telegram, Threema, WeChat, WhatsApp): Up to 500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionMedium	text		up to 1500 characters	Medium description (Discord, Facebook Reels, Instagram, LinkedIn, Signal, Slack, TikTok): Up to 1500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionLong	text		up to 4000 characters	Long description (Facebook Feed, YouTube): Up to 4000 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.hashtags	list		up to 15	Hashtags: Written without the #. Up to 15, which every platform takes.
metaData.hashtags[]	text		up to 60 characters	Hashtag

locales carries other languages: under each language code, the parts of clipData and metaData that differ, laid over the default, so a language with no copy still renders.

A picture is always a file from your media library: media:// followed by its id or its name. Anything the table does not list is refused, and so is anything over its limit, with a 400 schema_validation error that names the field.

Ask Reelwire for the whole JSON Schema, the document your content is checked against, without signing in:

curl "https://app.reelwire.io/v1/formats/template/tpl_2518c80fd3fb?variant=Corporate%20glass&version=1.0.0"

Delivery JSON

Your own system sends this to one of your streams, POST /v1/stream, and every channel listening to that stream draws it with its template. data is the document described above; a stream with an empty field map passes it to the template unchanged. Try it first on POST /v1/stream/validate, which answers the same without publishing anything. Streams and feeds explains the rest, including how to map a document of your own shape instead.

{
  "streamId": "st_your_stream_id",
  "eventId": "01M2SQMKK3G1NVFXV31DCBVB95",
  "occurredAt": "2026-09-23T07:00:00Z",
  "locale": "en",
  "data": {
    "clipData": {
      "kicker": "In pictures",
      "title": "Colour and water: the autumn exhibition",
      "slides": [
        {
          "line": "Twelve paintings of the sky over the bay, made in a single summer.",
          "label": "Room one",
          "picture": {
            "alt": "Clouds of red and orange light",
            "url": "media://example-image.png"
          },
          "headline": "Light before the storm"
        },
        {
          "line": "Large prints of the tide at dusk, shown together for the first time.",
          "label": "Room two",
          "picture": {
            "alt": "Soft colours drifting over black, with Your video here in the middle",
            "url": "media://example-video.mp4"
          },
          "headline": "Water in every colour"
        },
        {
          "line": "Free entry, guided tours on Saturdays at eleven.",
          "label": "Until 30 November",
          "picture": {
            "alt": "Green hills under a pale sky",
            "url": "media://example-image.svg"
          },
          "headline": "Open every day"
        }
      ],
      "transition": "fade",
      "direction": "left",
      "changeSpeed": "standard",
      "movement": "push-in",
      "captionAt": "bottom",
      "pictureFit": "fill",
      "pictureFocus": "centre",
      "source": "Pictures: Halden Gallery",
      "styleWords": {
        "live": "LIVE",
        "byline": "By",
        "functionKeys": [
          "HELP",
          "DATA",
          "CHART",
          "NEWS"
        ],
        "commandKey": "GO",
        "realTime": "RT",
        "messageLabel": "MSG",
        "pictureLabel": "IMG"
      },
      "look": {
        "theme": "auto",
        "pace": "auto",
        "corners": "auto",
        "align": "auto",
        "logo": "auto",
        "logoSize": "auto",
        "hideHeader": false,
        "hideFooter": false,
        "pattern": "auto"
      }
    },
    "metaData": {
      "title": "Colour and water: the autumn exhibition in three pictures",
      "captionTiny": "Colour and water, the autumn exhibition: the sky over the bay, the tide at dusk, open every day until 30 November.",
      "captionShort": "Colour and water, our autumn exhibition, in three pictures. Room one holds twelve paintings of the sky over the bay, room two large prints of the tide at dusk. Open every day until 30 November, free entry.",
      "captionMedium": "Colour and water, our autumn exhibition, in three pictures.\n\nRoom one: Light before the storm, twelve paintings of the sky over the bay, made in a single summer.\nRoom two: Water in every colour, large prints of the tide at dusk, shown together for the first time.\n\nOpen every day until 30 November. Free entry, guided tours on Saturdays at eleven.",
      "captionLong": "Colour and water, our autumn exhibition, in three pictures.\n\nRoom one is called Light before the storm: twelve paintings of the sky over the bay, all made in a single summer, as the weather turned from one hour to the next.\n\nRoom two is called Water in every colour: large prints of the tide at dusk, shown together for the first time, from the deep blue of the evening to the orange of the last light.\n\nThe exhibition is open every day until 30 November. Entry is free, and there are guided tours on Saturdays at eleven. Bring a friend, and tell us which room you liked best.",
      "hashtags": [
        "exhibition",
        "art",
        "gallery",
        "autumn",
        "inpictures"
      ]
    }
  }
}

The delivery names no version: which build draws it is the channel's choice, the newest of its variant or the one it is pinned to. eventId is a ULID you make once per event: sending the same one again changes nothing. occurredAt is when the thing happened, not when you sent it. locale is the language of the text in data, and data.locales carries other languages beside it.