Film editor and export · Help

The film editor turns your takes into one film: trim each shot, choose cuts or fades, set the volume, add a music or voice track and export an MP4.

The film editor with the film title, a preview player showing Mara at the console, and Film settings with frame, music track and track volume — The preview on the left, film settings on the right. Edits save automatically.

Open your film

From a storyboard: choose Open in editor. The chosen takes are laid out in order.
Add any finished clip from your library with Add a clip.
The editor saves automatically. The header shows the number of clips and the running time, for example 4 clips · 0:49.

Edit the timeline

The timeline with two shots, each with In and Out times, a volume slider and reorder buttons, a Fade 0.5s transition between them, and the Export your film panel — Each shot has In and Out times, a volume and a transition to the next shot.

Control	What it does
In / Out	Where the shot starts and ends, in seconds. Shots must be at least one second long.
Speaker and slider	Mute the shot's sound or set its volume
Up and down arrows	Move the shot earlier or later
Bin	Remove the shot from the film (the clip stays in your library)
Transition	Cut or Fade · 0.5s into the next shot
Frame	16:9 widescreen, 9:16 vertical or 1:1 square
Music or voice track	One MP3, M4A or WAV file up to 10 MB, with its own volume

How long will the film be?

Each shot lasts its Out time minus its In time. Every fade overlaps two shots by half a second, so each fade makes the film half a second shorter.

ExampleFour shots with two fades

Shot	In	Out	Length	Then
1	0.0	15.0	15.0 s	Fade
2	2.0	12.0	10.0 s	Cut
3	0.0	15.0	15.0 s	Fade
4	1.0	11.0	10.0 s	End

15 + 10 + 15 + 10 = 50 seconds of shots, minus 0.5 seconds for each of the two fades: the film runs 49 seconds.

Music and sound

Choose a file under Music or voice track. It plays from the start of the film and fades out at the end.
Set Track volume so the music sits under the shots' own sound.
Each shot keeps its native sound unless you mute it.

ExampleA balanced mix

Track volume: 30%
Shots 1 to 3: 100%, so the rain and radio static stay clear
Shot 4: Muted, so the score carries the final image

Preview

Choose Play to watch your cuts in order, or From the start to go back to the beginning. The preview shows trims and order; fades, music and the final mix appear in the export.

Export

Choose 720p or 1080p HD.
Choose Export MP4Rendering usually takes 1 to 3 minutes. You can keep working.
Choose Watch or DownloadEach export is listed as a version, for example 1080p · version 4.

Export sizes in pixels.
Frame	720p	1080p
16:9 widescreen	1280 × 720	1920 × 1080
9:16 vertical	720 × 1280	1080 × 1920
1:1 square	720 × 720	1080 × 1080

Captions and subtitles

Exported films have a clean picture with no text, by design. YouTube and most video platforms can create subtitles for you, and you can add titles in any video app.

Limits

Films up to 4 minutes and 24 shots.
Shots at least one second long after trimming.
Music up to 10 MB (MP3, M4A or WAV).

Quick answers

I can't hear the music or see the fades in the preview.

That's expected. The preview plays the cuts in order; fades and music are mixed into the export.

Do exports cost credits?

No. Exports are free, up to 20 a day.