video_trimmer 0.2.4

Flutter Android iOS

A Flutter package for trimming videos. This supports retrieving, trimming, and storage of trimmed video files to the file system.

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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 <project root>/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 <version>
    
  • Go to <project root>/android/build.gradle and add the following line:

     ext.flutterFFmpegPackage = '<package name>'
    

    Replace the <package name> with a proper package name from the Packages List section.

iOS #

  • Add the following keys to your Info.plist file, located in <project root>/ios/Runner/Info.plist:

    <key>NSCameraUsageDescription</key>
    <string>Used to demonstrate image picker plugin</string>
    <key>NSMicrophoneUsageDescription</key>
    <string>Used to capture audio for image picker plugin</string>
    <key>NSPhotoLibraryUsageDescription</key>
    <string>Used to demonstrate image picker plugin</string>
    
  • Set the platform version in ios/Podfile, 12.1 for Main Release or 9.3 for LTS Release.

    Refer to the FFmpeg Release section.

     platform :ios, '<version>'
    
  • Replace with the following in the # Plugin Pods section of the ios/Podfile:

     # 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+'/<package name>', :path => File.join(symlink, 'ios')
       else
           pod name, :path => File.join(symlink, 'ios')
       end
     end
    

    Replace the <package name> 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.

PackageMain ReleaseLTS Release
minminmin-lts
min-gplmin-gplmin-gpl-lts
httpshttpshttps-lts
https-gplhttps-gplhttps-gpl-lts
audioaudioaudio-lts
videovideovideo-lts
fullfullfull-lts
full-gplfull-gplfull-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()

Display the video trimmer area #

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

Example #

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:video_trimmer/trim_editor.dart';
import 'package:video_trimmer/video_trimmer.dart';
import 'package:video_trimmer/video_viewer.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 {
  final Trimmer _trimmer = Trimmer();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Video Trimmer"),
      ),
      body: Center(
        child: Container(
          child: RaisedButton(
            child: Text("LOAD VIDEO"),
            onPressed: () async {
              File file = await ImagePicker.pickVideo(
                source: ImageSource.gallery,
              );
              if (file != null) {
                await _trimmer.loadVideo(videoFile: file);
                Navigator.of(context)
                    .push(MaterialPageRoute(builder: (context) {
                  return TrimmerView(_trimmer);
                }));
              }
            },
          ),
        ),
      ),
    );
  }
}

class TrimmerView extends StatefulWidget {
  final Trimmer _trimmer;
  TrimmerView(this._trimmer);
  @override
  _TrimmerViewState createState() => _TrimmerViewState();
}

class _TrimmerViewState extends State<TrimmerView> {
  double _startValue = 0.0;
  double _endValue = 0.0;

  bool _isPlaying = false;
  bool _progressVisibility = false;

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

    String _value;

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

    return _value;
  }

  @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: <Widget>[
                Visibility(
                  visible: _progressVisibility,
                  child: LinearProgressIndicator(
                    backgroundColor: Colors.red,
                  ),
                ),
                RaisedButton(
                  onPressed: _progressVisibility
                      ? null
                      : () async {
                          _saveVideo().then((outputPath) {
                            print('OUTPUT PATH: $outputPath');
                            final snackBar = SnackBar(content: Text('Video Saved successfully'));
                            Scaffold.of(context).showSnackBar(snackBar);
                          });
                        },
                  child: Text("SAVE"),
                ),
                Expanded(
                  child: VideoViewer(),
                ),
                Center(
                  child: TrimEditor(
                    viewerHeight: 50.0,
                    viewerWidth: MediaQuery.of(context).size.width,
                    onChangeStart: (value) {
                      _startValue = value;
                    },
                    onChangeEnd: (value) {
                      _endValue = value;
                    },
                    onChangePlaybackState: (value) {
                      setState(() {
                        _isPlaying = value;
                      });
                    },
                  ),
                ),
                FlatButton(
                  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 widget._trimmer.videPlaybackControl(
                      startValue: _startValue,
                      endValue: _endValue,
                    );
                    setState(() {
                      _isPlaying = playbackState;
                    });
                  },
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}

License #

Copyright (c) 2020 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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Publisher

souvikbiswas.com

A Flutter package for trimming videos. This supports retrieving, trimming, and storage of trimmed video files to the file system.

Repository (GitHub)
View/report issues

Documentation

API reference

License

MIT (LICENSE)

Dependencies

file_picker, flutter, flutter_ffmpeg, intl, path, path_provider, video_player, video_thumbnail

More

Packages that depend on video_trimmer