React Native Video Trim

Video trimmer for your React Native app

Installation

npm install react-native-video-trim

# or with yarn

yarn add react-native-video-trim

Next for Android, under android/app/build.gradle, add jcenter to repositories this:

repositories {
    ... other repos if any
    jcenter()
}

Next install CocoaPods deps:

npx pod-install ios

Usage

Note that for iOS you have to try on real device

import { showEditor } from 'react-native-video-trim';

// ...

showEditor(videoUrl);

// or with output length limit

showEditor(videoUrl, {
  maxDuration: 20,
});

Usually this library will be used along with other library to select video file, Eg. react-native-image-picker. Below is real world example:

import * as React from 'react';

import {
  StyleSheet,
  View,
  Text,
  TouchableOpacity,
  NativeEventEmitter,
  NativeModules,
} from 'react-native';
import { isValidVideo, showEditor } from 'react-native-video-trim';
import { launchImageLibrary } from 'react-native-image-picker';
import { useEffect } from 'react';

export default function App() {
  useEffect(() => {
    const eventEmitter = new NativeEventEmitter(NativeModules.VideoTrim);
    const subscription = eventEmitter.addListener('VideoTrim', (event) => {
      switch (event.name) {
        case 'onShow': {
          console.log('onShowListener', event);
          break;
        }
        case 'onHide': {
          console.log('onHide', event);
          break;
        }
        case 'onStartTrimming': {
          console.log('onStartTrimming', event);
          break;
        }
        case 'onFinishTrimming': {
          console.log('onFinishTrimming', event);
          break;
        }
        case 'onCancelTrimming': {
          console.log('onCancelTrimming', event);
          break;
        }
        case 'onError': {
          console.log('onError', event);
          break;
        }
      }
    });

    return () => {
      subscription.remove();
    };
  }, []);

  return (
    <View style={styles.container}>
      <TouchableOpacity
        onPress={async () => {
          const result = await launchImageLibrary({
            mediaType: 'video',
          });

          isValidVideo(result.assets![0]?.uri || '').then((res) =>
            console.log(res)
          );

          showEditor(result.assets![0]?.uri || '', {
            maxDuration: 20,
          });
        }}
        style={{ padding: 10, backgroundColor: 'red' }}
      >
        <Text>Launch Library</Text>
      </TouchableOpacity>
      <TouchableOpacity
        onPress={() => {
          isValidVideo('invalid file path').then((res) => console.log(res));
        }}
        style={{
          padding: 10,
          backgroundColor: 'blue',
          marginTop: 20,
        }}
      >
        <Text>Check Video Valid</Text>
      </TouchableOpacity>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
});

Methods

showEditor(videoPath: string, config?: EditorConfig)

Main method to show Video Editor UI.

Params:

• videoPath: Path to video file, if this is an invalid path, onError event will be fired

• config (optional):

  • saveToPhoto (optional, default = true): whether to save video to photo/gallery after editing
  • maxDuration (optional): maximum duration for the trimmed video

If saveToPhoto = true, you must ensure that you have request permission to write to photo/gallery

• For Android: you need to have <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> in AndroidManifest.xml
• For iOS: you need NSPhotoLibraryUsageDescription in Info.plist

isValidVideo (videoPath: string)

This method is to check if a path is a actual video. It returns Promise<boolean>

Events

To listen for events you interest, do the following:

useEffect(() => {
  const eventEmitter = new NativeEventEmitter(NativeModules.VideoTrim);
  const subscription = eventEmitter.addListener('VideoTrim', (event) => {
    switch (event.name) {
      case 'onShow': {
        // on Dialog show
        console.log('onShowListener', event);
        break;
      }
      case 'onHide': {
        // on Dialog hide
        console.log('onHide', event);
        break;
      }
      case 'onStartTrimming': {
        // Android only: on start trimming
        console.log('onStartTrimming', event);
        break;
      }
      case 'onFinishTrimming': {
        // on trimming is done
        console.log('onFinishTrimming', event);
        break;
      }
      case 'onCancelTrimming': {
        // when user clicks Cancel button
        console.log('onCancelTrimming', event);
        break;
      }
      case 'onError': {
        // any error occured: invalid file, lack of permissions to write to photo/gallery, unexpected error...
        console.log('onError', event);
        break;
      }
    }
  });

  return () => {
    subscription.remove();
  };
}, []);

Thanks

Android part is created by modified + fix bugs from original project