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sbis04
253 Stars 111 Forks MIT License 195 Commits 25 Opened issues

Description

Flutter video trimmer package

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Video Trimmer

A Flutter package for trimming videos

Features

  • Customizable video trimmer
  • Video playback control
  • Retrieving and storing video file

Also, supports conversion to GIF.

TRIM EDITOR

Trim Editor

EXAMPLE APP

Trimmer

CUSTOMIZABLE VIDEO EDITOR

Trim Editor

Usage

  • Add the dependency
    video_trimmer
    to your pubspec.yaml file.

Android

  • Go to
    /android/app/build.gradle
    and set the proper
    minSdkVersion
    , 24 for Main Release or 16 for LTS Release.

Refer to the FFmpeg Release section.

   minSdkVersion 
  • Go to
    /android/build.gradle
    and add the following line:
   ext.flutterFFmpegPackage = ''

Replace the

 with a proper package name from the Packages List section.

iOS

  • Add the following keys to your Info.plist file, located in

    /ios/Runner/Info.plist
    :
    NSCameraUsageDescription
    Used to demonstrate image picker plugin
    NSMicrophoneUsageDescription
    Used to capture audio for image picker plugin
    NSPhotoLibraryUsageDescription
    Used to demonstrate image picker plugin
    
  • Set the platform version in

    ios/Podfile
    , 11.0 for Main Release or 9.3 for LTS Release.

Refer to the FFmpeg Release section.

   platform :ios, ''
  • [Flutter >= 1.20.x] Edit
    ios/Podfile
    and add the following block before
    target 'Runner' do
    section:
   def flutter_install_ios_plugin_pods(ios_application_path = nil)
     # defined_in_file is set by CocoaPods and is a Pathname to the Podfile.
     ios_application_path ||= File.dirname(defined_in_file.realpath) if self.respond_to?(:defined_in_file)
     raise 'Could not find iOS application path' unless ios_application_path

 # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
 # referring to absolute paths on developers' machines.

 symlink_dir = File.expand_path('.symlinks', ios_application_path)
 system('rm', '-rf', symlink_dir) # Avoid the complication of dependencies like FileUtils.

 symlink_plugins_dir = File.expand_path('plugins', symlink_dir)
 system('mkdir', '-p', symlink_plugins_dir)

 plugins_file = File.join(ios_application_path, '..', '.flutter-plugins-dependencies')
 plugin_pods = flutter_parse_plugins_file(plugins_file)
 plugin_pods.each do |plugin_hash|
   plugin_name = plugin_hash['name']
   plugin_path = plugin_hash['path']
   if (plugin_name && plugin_path)
     symlink = File.join(symlink_plugins_dir, plugin_name)
     File.symlink(plugin_path, symlink)

     if plugin_name == 'flutter_ffmpeg'
         pod 'flutter_ffmpeg/<package name>', :path =&gt; File.join('.symlinks', 'plugins', plugin_name, 'ios')
     else
         pod plugin_name, :path =&gt; File.join('.symlinks', 'plugins', plugin_name, 'ios')
     end
   end
 end

end

Replace the

 with a proper package name from the Packages List section.
  • [Flutter < 1.20.x] Edit
    ios/Podfile
    file and modify the default
    # Plugin Pods
    block as follows.
   # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
   # referring to absolute paths on developers' machines.

system('rm -rf .symlinks') system('mkdir -p .symlinks/plugins') plugin_pods = parse_KV_file('../.flutter-plugins') plugin_pods.each do |name, path| symlink = File.join('.symlinks', 'plugins', name) File.symlink(path, symlink) if name == 'flutter_ffmpeg' pod name+'/', :path => File.join(symlink, 'ios') else pod name, :path => File.join(symlink, 'ios') end end

Replace the

 with a proper package name from the Packages List section.

FFmpeg Release

In reference to the releases specified in the flutter_ffmpeg package.

Main Release LTS Release
Android API Level 24 16
Android Camera Access Yes -
Android Architectures arm-v7a-neon
arm64-v8a
x86
x86-64
arm-v7a
arm-v7a-neon
arm64-v8a
x86
x86-64
Xcode Support 10.1 7.3.1
iOS SDK 12.1 9.3
iOS Architectures arm64
arm64e
x86-64
armv7
arm64
i386
x86-64

Packages List

The following FFmpeg Packages List is in reference to the flutter_ffmpeg package.

| Package | Main Release | LTS Release | | :----: | :----: | :----: | | min | min | min-lts | | min-gpl | min-gpl | min-gpl-lts | | https | https | https-lts | | https-gpl | https-gpl | https-gpl-lts | | audio | audio | audio-lts | | video | video | video-lts | | full | full | full-lts | | full-gpl | full-gpl | full-gpl-lts |

Functionalities

Loading input video file

final Trimmer _trimmer = Trimmer();
await _trimmer.loadVideo(videoFile: file);

Saving trimmed video

Returns a string to indicate whether the saving operation was successful.

await _trimmer
    .saveTrimmedVideo(startValue: _startValue, endValue: _endValue)
    .then((value) {
  setState(() {
    _value = value;
  });
});

Video playback state

Returns the video playback state. If true then the video is playing, otherwise it is paused.

await _trimmer.videPlaybackControl(
  startValue: _startValue,
  endValue: _endValue,
);

Advanced Command

You can use an advanced FFmpeg command if you require more customization. Just define your FFmpeg command using the

ffmpegCommand
property and set an output video format using
customVideoFormat
.

Refer to the Official FFmpeg Documentation for more information.

NOTE: Passing a wrong video format to the

customVideoFormat
property may result in a crash.
// Example of defining a custom command

// This is already used for creating GIF by // default, so you do not need to use this.

await _trimmer .saveTrimmedVideo( startValue: _startValue, endValue: _endValue, ffmpegCommand: '-vf "fps=10,scale=480:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0', customVideoFormat: '.gif') .then((value) { setState(() { _value = value; }); });

Widgets

Display a video playback area

VideoViewer(trimmer: _trimmer)

Display the video trimmer area

TrimEditor(
  trimmer: _trimmer,
  viewerHeight: 50.0,
  viewerWidth: MediaQuery.of(context).size.width,
  maxVideoLength: Duration(seconds: 10),
  onChangeStart: (value) {
    _startValue = value;
  },
  onChangeEnd: (value) {
    _endValue = value;
  },
  onChangePlaybackState: (value) {
    setState(() {
      _isPlaying = value;
    });
  },
)

Example

Before using this example directly in a Flutter app, don't forget to add the

video_trimmer
&
file_picker
packages to your
pubspec.yaml
file.

You can try out this example by replacing the entire content of

main.dart
file of a newly created Flutter project.
import 'dart:io';

import 'package:file_picker/file_picker.dart'; import 'package:flutter/material.dart'; import 'package:video_trimmer/video_trimmer.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Video Trimmer', theme: ThemeData( primarySwatch: Colors.blue, ), home: HomePage(), ); } }

class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("Video Trimmer"), ), body: Center( child: Container( child: ElevatedButton( child: Text("LOAD VIDEO"), onPressed: () async { FilePickerResult? result = await FilePicker.platform.pickFiles( type: FileType.video, allowCompression: false, ); if (result != null) { File file = File(result.files.single.path!); Navigator.of(context).push( MaterialPageRoute(builder: (context) { return TrimmerView(file); }), ); } }, ), ), ), ); } }

class TrimmerView extends StatefulWidget { final File file;

TrimmerView(this.file);

@override _TrimmerViewState createState() => _TrimmerViewState(); }

class _TrimmerViewState extends State { final Trimmer _trimmer = Trimmer();

double _startValue = 0.0; double _endValue = 0.0;

bool _isPlaying = false; bool _progressVisibility = false;

Future _saveVideo() async { setState(() { _progressVisibility = true; });

String? _value;

await _trimmer
    .saveTrimmedVideo(startValue: _startValue, endValue: _endValue)
    .then((value) {
  setState(() {
    _progressVisibility = false;
    _value = value;
  });
});

return _value;

}

void _loadVideo() { _trimmer.loadVideo(videoFile: widget.file); }

@override void initState() { super.initState();

_loadVideo();

}

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("Video Trimmer"), ), body: Builder( builder: (context) => Center( child: Container( padding: EdgeInsets.only(bottom: 30.0), color: Colors.black, child: Column( mainAxisAlignment: MainAxisAlignment.center, mainAxisSize: MainAxisSize.max, children: [ Visibility( visible: _progressVisibility, child: LinearProgressIndicator( backgroundColor: Colors.red, ), ), ElevatedButton( onPressed: _progressVisibility ? null : () async { _saveVideo().then((outputPath) { print('OUTPUT PATH: $outputPath'); final snackBar = SnackBar( content: Text('Video Saved successfully')); ScaffoldMessenger.of(context).showSnackBar( snackBar, ); }); }, child: Text("SAVE"), ), Expanded( child: VideoViewer(trimmer: _trimmer), ), Center( child: TrimEditor( trimmer: _trimmer, viewerHeight: 50.0, viewerWidth: MediaQuery.of(context).size.width, maxVideoLength: Duration(seconds: 10), onChangeStart: (value) { _startValue = value; }, onChangeEnd: (value) { _endValue = value; }, onChangePlaybackState: (value) { setState(() { _isPlaying = value; }); }, ), ), TextButton( child: _isPlaying ? Icon( Icons.pause, size: 80.0, color: Colors.white, ) : Icon( Icons.play_arrow, size: 80.0, color: Colors.white, ), onPressed: () async { bool playbackState = await _trimmer.videPlaybackControl( startValue: _startValue, endValue: _endValue, ); setState(() { _isPlaying = playbackState; }); }, ) ], ), ), ), ), ); } }

License

Copyright (c) 2021 Souvik Biswas

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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