Flutter video editor

A video editor that allows to edit (trim, crop, rotate and scale) and choose a cover with a very flexible UI design. The changes are then exported with ffmpeg.

📖 Installation

Following steps will help you add this library as a dependency in your flutter project.

• In the pubspec.yaml file in the root of your project

dependencies:
  video_editor: ^1.4.1

• Run the following command to install the package:

$ flutter packages get

• Import the package in your project file:

import 'package:video_editor/video_editor.dart';

Since v1.3.0, video_editor uses ffmpeg_kit_flutter main release which supports the latest features. (More info on flutter FFmepeg kit)

Those Android API level and iOS deployment target are required to uses this package. If you're planing to target older devices, check about the LTS release.

Android API Level	iOS Minimum Deployment Target
24	12.1

📸 Screenshots

(The UI Design is fully customizable on the example)

Crop Video	Rotate Video	Video cover (selection, viewer)

Trim video	Trimmer customization

👀 Usage

VideoEditorController

Function	Description
initialize()	Init the controller parameters, the video, the trim and the cover
rotate90Degrees(RotateDirection)	Rotate the video by 90 degrees in the direction provided
preferredCropAspectRatio	Update the aspect ratio of the crop area
updateCrop	Update the controller crop min and max values
getMetaData(onCompleted)	Return the metadata of the video file in onCompleted function
exportVideo(onCompleted)	Return the generated video with the controller parameters in onCompleted function
extractCover(onCompleted)	Return the selected cover with the controller parameters in onCompleted function

Widgets

Click to expand widgets documentation

Crop

1. CropGridViewer

This widget is used to enable the crop actions on top of the video, or only to preview the cropped result.

Param	Description
required VideoEditorController controller	The controller param is mandatory so every change in the controller settings will propagate in the crop view
bool showGrid = true	The showGrid param specifies whether the crop action can be triggered and if the crop grid is shown, set this param to false to display the preview of the cropped video
double horizontalMargin = 0.0	The horizontalMargin param need to be specify when there is a margin outside the crop view, so in case of a change the new layout can be computed properly (i.e after a rotation)

Trimmer

1. TrimSlider

Display the trimmer containing video thumbnails with rotation and crop parameters.

Param	Description
required VideoEditorController controller	The controller param is mandatory so every change in the controller settings will propagate in the trim slider view
double height = 0.0	The height param specifies the height of the generated thumbnails
double quality = 10	The quality param specifies the quality of the generated thumbnails, from 0 to 100 (more info)
double horizontalMargin = 0.0	The horizontalMargin param specifies the horizontal space to set around the slider. It is important when the trim can be dragged (controller.maxDuration < controller.videoDuration)
Widget? child	The child param can be specify to display a widget below this one (e.g: TrimTimeline)

2. TrimTimeline

Display the video timeline.

Param	Description
required VideoEditorController controller	The controller param is mandatory so depending on the controller.maxDuration, the generated timeline will be different
double secondGap = 5	The secondGap param specifies time gap in second between every points of the timeline
EdgeInsets margin = EdgeInsets.zero	The margin param specifies the space surrounding the timeline

Cover

1. CoverSelection

Display a couple of generated covers with rotation and crop parameters to updated the selected cover.

Param	Description
required VideoEditorController controller	The controller param is mandatory so every change in the controller settings will propagate in the cover selection view
double height = 0.0	The height param specifies the height of the generated thumbnails
double quality = 10	The quality param specifies the quality of the generated thumbnails, from 0 to 100 (more info)
double horizontalMargin = 0.0	The horizontalMargin param need to be specify when there is a margin outside the crop view, so in case of a change the new layout can be computed properly.
int quantity = 5	The quantity param specifies the quantity of thumbnails to generate

2. CoverViewer

Display the selected cover with rotation and crop parameters.

Param	Description
required VideoEditorController controller	The controller param is mandatory so every change in the controller settings will propagate the crop parameters in the cover view
String noCoverText = 'No selection'	The noCoverText param specifies the text to display when selectedCover is null

Style

Click to expand style documentation

1. CropStyle

You can create your own CropStyle class to customize the CropGridViewer appareance.

Param	Description
Color croppingBackground = Colors.black.withOpacity(0.48)	The croppingBackground param specifies the color of the paint area outside the crop area when copping
Color background = Colors.black	The background param specifies the color of the paint area outside the crop area when not copping
double gridLineWidth = 1	The gridLineWidth param specifies the width of the crop lines
Color gridLineColor = Colors.white	The gridLineColor param specifies the color of the crop lines
int gridSize = 3	The gridSize param specifies the quantity of columns and rows in the crop view
Color boundariesColor = Colors.white	The boundariesColor param specifies the color of the crop area's corner
double boundariesLength = 20	The boundariesLength param specifies the length of the crop area's corner
double boundariesWidth = 5	The boundariesWidth param specifies the width of the crop area's corner

2. TrimStyle

You can create your own TrimStyle class to customize the TrimSlider appareance.

Param	Description
Color background = Colors.black.withOpacity(0.6)	The background param specifies the color of the paint area outside the trimmed area
Color positionLineColor = Colors.red	The positionLineColor param specifies the color of the line showing the video position
double positionLineWidth = 2	The positionLineWidth param specifies the width of the line showing the video position
Color lineColor = Colors.white	The lineColor param specifies the color of the borders around the trimmed area
double lineWidth = 2	The lineWidth param specifies the width of the borders around the trimmed area
Color iconColor = Colors.black	The iconColor param specifies the color of the icons on the trimmed area's edges
double circleSize = 8	The circleSize param specifies the size of the circle behind the icons on the trimmed area's edges
double iconSize = 25	The iconSize param specifies the size of the icon on the trimmed area's edges
IconData? leftIcon = Icons.arrow_left	The leftIcon param specifies the icon to show on the left edge of the trimmed area
IconData? rightIcon = Icons.arrow_right	The rightIcon param specifies the icon to show on the right edge of the trimmed area

3. CoverStyle

You can create your own CoverStyle class to customize the CoverSelection appareance.

Param	Description
Color selectedBorderColor = Colors.white	The selectedBorderColor param specifies the color of the border around the selected cover thumbnail
double selectedBorderWidth = 2	The selectedBorderWidth param specifies the width of the border around the selected cover thumbnail

FAQ

1. How to use FFmpeg LTS release

Since v1.3.0, video_editor uses ffmpeg_kit_flutter main release which supports the latest features. If you want to support a wider range of devices you should use the LTS release. more info

To do this, add this to your pubspec.yaml:

dependency_overrides:
  ffmpeg_kit_flutter_min_gpl: ^4.5.1-LTS

✨ Main contributors

Le Goff Maël