Join videos

• Type video.concat
• Group MZBase
• Role action
• Risk reads only
• Side effect none
• Runs once per execution
• Needs media

Joins videos one after another

Also available to AI agents and over MCP as a tool.

Parameters

source

Source · string · required · default binary · one of binary, media

Where the input file comes from: the item’s file (binary), a media library item, or a URL.

binaryProperty

File field · string · optional · default data

Shown when source is binary.

mediaId

Media · string · optional

Shown when source is media.

transition

Transition · string · optional · default fade · one of none, fade, crossfade, slide, zoom

The transition between clips.

transitionSeconds

Transition (seconds) · number · optional · default 0.5 · range 0 – 5

normalize

Match sizes · boolean · optional · default true

into

Into field · string · optional · default data

saveTo

Save to · string · optional · default none · one of none, media

Where the result goes: back on the item as a file, or into the media library (the item then gets mediaId).

mediaFolder

Media folder · string · optional

Shown when saveTo is media.

mediaTags

Media tags · array · optional

Shown when saveTo is media.

Outputs

• main

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