native_video_compress

A Flutter plugin that compresses video files using native encoders on iOS and Android.

Example ScreenShot

📸 Preview

‼️ Caution

It takes time for each Android/IOS to compress the video, so you have to wait for it to be compressed. The UI/UX component in that area should be implemented freely.

🧭 Supported Platforms

Android
iOS

Not supported: Web, macOS, Windows, Linux.

⭐️ Features

Target bitrate: reduce file size by setting an average video bitrate
Resize: specify output width/height (defaults to original if omitted)
Video codecs: h264, h265/hevc
Audio codecs/quality: aac, alac, mp3 with bitrate/sample rate/channels
Info logging: print size, resolution, and duration before/after compression
Temp file management: result is written to the temporary directory; Function to clear cache

🔶 Requirements

Flutter: SDK ^3.8.1, Flutter >= 3.3.0
Android: minSdk 21, compileSdk 33, ndkVersion 27.0.12077973
iOS: iOS 12.0+

😎 Installation

flutter pub add native_video_compress

pubspec.yaml example

dependencies:
  native_video_compress: ^${latest_version}

No additional platform setup is required. Note that H.265 (HEVC) encoding requires device/OS support.

⚠️ Android Setup (NDK version)

Some Android environments require an explicit NDK version to build Media3/Transformer properly. If you encounter NDK/transformer build errors, set the NDK version in your app module's Gradle (Kotlin DSL):

// android/app/build.gradle.kts
android {
    compileSdk = flutter.compileSdkVersion
    ndkVersion = "27.0.12077973"
    // ...
}

Notes:

This plugin already sets ndkVersion = "27.0.12077973" in its own library module. Some projects still need the app module to match it explicitly.
Ensure your Android Gradle Plugin and Gradle wrapper are up-to-date, or align the NDK version as above if builds fail.

🚀 Quick Start

Compress Video

import 'package:native_video_compress/controller/native_video_compressor.dart';
import 'package:native_video_compress/enum/video_setting.dart';
import 'package:native_video_compress/enum/audio_setting.dart';

final output = await NativeVideoController.compressVideo(
  inputPath: "/path/to/input.mp4",
  bitrate: 2_000_000, // 2 Mbps
  width: 1280,        // optional (Nullable)
  height: 720,        // optional (Nullable)
  videoSetting: VideoSetting.h264, // h265/hevc also supported (Default)
  audioSetting: AudioSetting.aac,  // alac, mp3 also supported (Default)
  audioBitrate: 128000, // optional (Default)
  audioSampleRate: 44100, // optional (Default)
  audioChannels: 2, // optional (Default)
  printingInfo: false, // log info before/after
);

Clear Cache

await NativeVideoController.clearCache();

Printing Info

await NativeVideoController.printVideoInfo("/path/to/input.mp4");

🧩 Parameters

Parameter	Type	Default	Description
inputPath	String	—	Input video path (required).
bitrate	int	2,000,000	Average video bitrate in bps.
width	int?	null	Output width; keeps original if null.
height	int?	null	Output height; keeps original if null.
videoSetting	VideoSetting	h264	Video codec. Allowed: h264, h265, hevc.
audioSetting	AudioSetting	aac	Audio codec. Allowed: aac (lossy), alac (lossless), mp3 (lossy).
audioBitrate	int	128,000	Audio bitrate in bps.
audioSampleRate	int	44,100	Audio sample rate in Hz.
audioChannels	int	2	Number of channels (1=mono, 2=stereo).
printingInfo	bool	false	Print size/resolution/duration before/after.
outputPath	String	temp/compressed.mp4	Auto-generated in temporary directory; not a function parameter, returned path may be copied/moved as needed.

Enums

enum VideoSetting { h264('h264', 'H.264/AVC'), h265('h265', 'H.265/HEVC'), hevc('hevc', 'H.265/HEVC') }
enum AudioSetting { aac('aac', false), alac('alac', true), mp3('mp3', false) }

✅ Cache Management

NativeVideoController.clearCache() -> Future<void>

Deletes the compressed.mp4 from the temporary directory.
Call this after you copy/move the output to a permanent location, or when the compressed file is no longer needed.

Example:

// If you don't need the temporary output anymore
await NativeVideoController.clearCache();

Platform Notes

Android
- If the compressed file becomes larger than the input, the plugin returns the original by copying it to the output path.
- Resolution is rounded to a multiple of 16 internally (encoder constraints).
- h265/hevc requires a supported device encoder; otherwise it may fail.
- Lowering bitrate without resizing may have limited effect; consider setting width/height as well.
iOS
- Handles rotation (preferred transform) to preserve the correct orientation.
- h265/hevc requires HEVC support on the device/OS.
- alac is lossless.

👀 Example App

See the example/ project in this repository.

Page: example/lib/page/native_video_compress_page.dart
Player widget: example/lib/component/video_file_widget.dart