$ npm install react-native-video-helper --save

$ react-native link react-native-video-helper

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-video-helper and add RNVideoHelper.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNVideoHelper.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.reactlibrary.RNVideoHelperPackage; to the imports at the top of the file
• Add new RNVideoHelperPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-video-helper' project(':react-native-video-helper').projectDir = new File(rootProject.projectDir,	'../node_modules/react-native-video-helper/android') 

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

    compile project(':react-native-video-helper') 

import RNVideoHelper from 'react-native-video-helper'; const sourceUri = 'assets-library://asset/asset.mov?id=0F3F0000-9518-4F32-B389-7117F4C2B069&ext=mov'; RNVideoHelper.compress(sourceUri, { startTime: 10, // optional, in seconds, defaults to 0 endTime: 100, // optional, in seconds, defaults to video duration quality: 'low', // default low, can be medium or high bitRate:1.3*1000*1000 //default low:1.3M,medium:1.9M,high:2.6M defaultOrientation: 0 // By default is 0, some devices not save this property in metadata. Can be between 0 - 360 }).progress(value => { console.warn('progress', value); // Int with progress value from 0 to 1 }).then(data => { //data.path the file path //data.size the file size at bit //data.width the video width //data.height the video height //data.duration the video duration //data.mime the file mime type console.warn('compressedUri', data); // String with path to temporary compressed video });