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ffmpeg-kit/flutter/flutter/README.md

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# FFmpegKit for Flutter
### 1. Features
- Includes both `FFmpeg` and `FFprobe`
- Supports
- `Android`, `iOS` and `macOS`
- FFmpeg `v4.5-dev` releases
- `arm-v7a`, `arm-v7a-neon`, `arm64-v8a`, `x86` and `x86_64` architectures on Android
- `Android API Level 16` or later
- `armv7`, `armv7s`, `arm64`, `arm64-simulator`, `i386`, `x86_64`, `x86_64-mac-catalyst` and `arm64-mac-catalyst`
architectures on iOS
- `iOS SDK 9.3` or later
- `arm64` and `x86_64` architectures on macOS
- `macOS SDK 10.11+` or later
- Can process Storage Access Framework (SAF) Uris on Android
- 24 external libraries
`dav1d`, `fontconfig`, `freetype`, `fribidi`, `gmp`, `gnutls`, `kvazaar`, `lame`, `libass`, `libiconv`, `libilbc`
, `libtheora`, `libvorbis`, `libvpx`, `libwebp`, `libxml2`, `opencore-amr`, `opus`, `shine`, `snappy`, `soxr`
, `speex`, `twolame`, `vo-amrwbenc`
- 4 external libraries with GPL license
`vid.stab`, `x264`, `x265`, `xvidcore`
- Licensed under LGPL 3.0, can be customized to support GPL v3.0
### 2. Installation
Add `ffmpeg_kit_flutter` as a dependency in your `pubspec.yaml file`.
```yaml
dependencies:
ffmpeg_kit_flutter: ^4.5.0
```
#### 2.1 Packages
`ffmpeg` includes built-in encoders for some popular formats. However, there are certain external libraries that needs
to be enabled in order to encode specific formats/codecs. For example, to encode an `mp3` file you need `lame` or
`shine` library enabled. You have to install a `ffmpeg_kit_flutter` package that has at least one of them inside. To
encode an `h264` video, you need to install a package with `x264` inside. To encode `vp8` or `vp9` videos, you need
a `ffmpeg_kit_flutter` package with `libvpx` inside.
`ffmpeg-kit` provides eight packages that include different sets of external libraries. These packages are named
according to the external libraries included in them. Refer to
[Packages](https://github.com/tanersener/ffmpeg-kit#8-packages) section of the project README to see the names of those
packages and external libraries included in each of them.
#### 2.2 Installing Packages
Installing `ffmpeg_kit_flutter` enables the `https` package by default. It is possible to install the other packages
using the following dependency format.
```yaml
dependencies:
ffmpeg_kit_flutter_<package name>: ^4.5.0
```
Note that hyphens in the package name must be replaced with underscores. Additionally, do not forget to use the package
name in the import statements if you install a package.
#### 2.3 Installing LTS Releases
In order to install the `LTS` variant, append `-LTS` to the version you have for the `ffmpeg_kit_flutter` dependency.
```yaml
dependencies:
ffmpeg_kit_flutter: 4.5.0-LTS
```
#### 2.4 LTS Releases
`ffmpeg_kit_flutter` is published in two different variants: `Main Release` and `LTS Release`. Both releases share the
same source code but is built with different settings (Architectures, API Level, iOS Min SDK, etc.). Refer to
[LTS Releases](https://github.com/tanersener/ffmpeg-kit#10-lts-releases) section of the project README to see how they
compare to each other.
### 3. Using
1. Execute FFmpeg commands.
```dart
import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';
FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (session) async {
final returnCode = await session.getReturnCode();
if (ReturnCode.isSuccess(returnCode)) {
// SUCCESS
} else if (ReturnCode.isCancel(returnCode)) {
// CANCEL
} else {
// ERROR
}
});
```
2. Each `execute` call creates a new session. Access every detail about your execution from the session created.
```dart
FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (session) async {
// Unique session id created for this execution
final sessionId = session.getSessionId();
// Command arguments as a single string
final command = session.getCommand();
// Command arguments
final commandArguments = session.getArguments();
// State of the execution. Shows whether it is still running or completed
final state = await session.getState();
// Return code for completed sessions. Will be undefined if session is still running or FFmpegKit fails to run it
final returnCode = await session.getReturnCode();
final startTime = session.getStartTime();
final endTime = await session.getEndTime();
final duration = await session.getDuration();
// Console output generated for this execution
final output = await session.getOutput();
// The stack trace if FFmpegKit fails to run a command
final failStackTrace = await session.getFailStackTrace();
// The list of logs generated for this execution
final logs = await session.getLogs();
// The list of statistics generated for this execution (only available on FFmpegSession)
final statistics = await (session as FFmpegSession).getStatistics();
});
```
3. Execute `FFmpeg` commands by providing session specific `execute`/`log`/`session` callbacks.
```dart
FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (Session session) async {
// CALLED WHEN SESSION IS EXECUTED
}, (Log log) {
// CALLED WHEN SESSION PRINTS LOGS
}, (Statistics statistics) {
// CALLED WHEN SESSION GENERATES STATISTICS
});
```
4. Execute `FFprobe` commands.
```dart
FFprobeKit.executeAsync(ffprobeCommand, (session) {
// CALLED WHEN SESSION IS EXECUTED
});
```
5. Get media information for a file/url.
```dart
FFprobeKit.getMediaInformationAsync('<file path or url>', (session) async {
final information = await (session as MediaInformationSession).getMediaInformation();
});
```
6. Stop ongoing FFmpeg operations.
- Stop all sessions
```dart
FFmpegKit.cancel();
```
- Stop a specific session
```dart
FFmpegKit.cancel(sessionId);
```
7. (Android) Convert Storage Access Framework (SAF) Uris into paths that can be read or written by
`FFmpegKit` and `FFprobeKit`.
- Reading a file:
```dart
FFmpegKitConfig.selectDocumentForRead('*/*').then((uri) {
FFmpegKitConfig.getSafParameterForRead(uri!).then((safUrl) {
FFmpegKit.executeAsync("-i ${safUrl!} -c:v mpeg4 file2.mp4");
});
});
```
- Writing to a file:
```dart
FFmpegKitConfig.selectDocumentForWrite('video.mp4', 'video/*').then((uri) {
FFmpegKitConfig.getSafParameterForWrite(uri!).then((safUrl) {
FFmpegKit.executeAsync("-i file1.mp4 -c:v mpeg4 ${safUrl}");
});
});
```
8. Get previous `FFmpeg` and `FFprobe` sessions from the session history.
```dart
FFmpegKit.listSessions().then((sessionList) {
sessionList.forEach((session) {
final sessionId = session.getSessionId();
});
});
FFprobeKit.listSessions().then((sessionList) {
sessionList.forEach((session) {
final sessionId = session.getSessionId();
});
});
```
9. Enable global callbacks.
- Execute Callback, called when an async execution is ended
```dart
FFmpegKitConfig.enableExecuteCallback((session) {
final sessionId = session.getSessionId();
});
```
- Log Callback, called when a session generates logs
```dart
FFmpegKitConfig.enableLogCallback((log) {
final message = log.getMessage();
});
```
- Statistics Callback, called when a session generates statistics
```dart
FFmpegKitConfig.enableStatisticsCallback((statistics) {
final size = statistics.getSize();
});
```
10. Register system fonts and custom font directories.
```dart
FFmpegKitConfig.setFontDirectoryList(["/system/fonts", "/System/Library/Fonts", "<folder with fonts>"]);
```
### 4. Test Application
You can see how `FFmpegKit` is used inside an application by running `flutter` test applications developed under
the [FFmpegKit Test](https://github.com/tanersener/ffmpeg-kit-test) project.
### 5. Tips
See [Tips](https://github.com/tanersener/ffmpeg-kit/wiki/Tips) wiki page.
### 6. License
See [License](https://github.com/tanersener/ffmpeg-kit/wiki/License) wiki page.
### 7. Patents
See [Patents](https://github.com/tanersener/ffmpeg-kit/wiki/Patents) wiki page.