update documentation

Author: tanersener

.github/ISSUE_TEMPLATE/bug_report.md

@@ -27,14 +27,14 @@ Post logs here or paste them to [Ghostbin](https://ghostbin.co) and insert the l
 
 **Environment**
 
-- Platform: `Android`/`Flutter`/`iOS`/`macOS`/`ReactNative`/`tvOS`
+- Platform: `Android`/`Flutter`/`iOS`/`Linux`/`macOS`/`ReactNative`/`tvOS`
 - Architecture: `arm-v7a`, `arm-v7a-neon`, `arm64-v8a`, `x86`, `x86_64`, `armv7`, `armv7s`, `arm64`, `arm64-mac-catalyst`, `arm64-simulator`, `arm64e`, `i386`, `x86-64`, `x86-64-mac-catalyst`
-- Version: `v4.5`/`v4.5.LTS`
+- Version: `v5.1`/`v5.1.LTS`
 - Source branch: `main`, `development`
-- Xcode version: `12.4.1`
-- Cocoapods version: `1.10.1`
+- Xcode version: `13.4.1`
+- Cocoapods version: `1.10.3`
 - Android Studio version: `4.0`
-- Android NDK version: `r22b`
+- Android NDK version: `r25b`
 - flutter doctor: ` `
 - react-native info: ` `
 

.github/pull_request_template.md

@@ -8,7 +8,7 @@ Please also include the context and motivation about the changes introduced.
 - Documentation
 
 ## Checks
-- [ ] Changes support all platforms (`Android`, `iOS`, `macOS`, `tvOS`)
+- [ ] Changes support all platforms (`Android`, `iOS`, `Linux`, macOS`, `tvOS`)
 - [ ] Breaks existing functionality
 - [ ] Implementation is completed, not half-done 
 - [ ] Is there another PR already created for this feature/bug fix

README.md

@@ -1,8 +1,8 @@
-# FFmpegKit ![GitHub release](https://img.shields.io/badge/release-v4.5.1-blue.svg) ![Maven Central](https://img.shields.io/maven-central/v/com.arthenica/ffmpeg-kit-min) ![CocoaPods](https://img.shields.io/cocoapods/v/ffmpeg-kit-ios-min) ![pub](https://img.shields.io/pub/v/ffmpeg_kit_flutter.svg) ![npm](https://img.shields.io/npm/v/ffmpeg-kit-react-native.svg)
+# FFmpegKit ![GitHub release](https://img.shields.io/badge/release-v5.1-blue.svg) ![Maven Central](https://img.shields.io/maven-central/v/com.arthenica/ffmpeg-kit-min) ![CocoaPods](https://img.shields.io/cocoapods/v/ffmpeg-kit-ios-min) ![pub](https://img.shields.io/pub/v/ffmpeg_kit_flutter.svg) ![npm](https://img.shields.io/npm/v/ffmpeg-kit-react-native.svg)
 
 <img src="https://github.com/arthenica/ffmpeg-kit/blob/main/docs/assets/ffmpeg-kit-icon-v9.png" width="240">
 
-`FFmpegKit` is a collection of tools to use `FFmpeg` in `Android`, `iOS`, `macOS`, `tvOS`, `Flutter` and `React Native` applications.
+`FFmpegKit` is a collection of tools to use `FFmpeg` in `Android`, `iOS`, `Linux`, `macOS`, `tvOS`, `Flutter` and `React Native` applications.
 
 It includes scripts to build `FFmpeg` native libraries, a wrapper library to run `FFmpeg`/`FFprobe` commands in
  applications and 8 prebuilt binary packages available at [Github](https://github.com/arthenica/ffmpeg-kit/releases),
@@ -11,9 +11,9 @@ It includes scripts to build `FFmpeg` native libraries, a wrapper library to run
 ### 1. Features
 - Scripts to build FFmpeg native libraries
 - `FFmpegKit` wrapper library to run `FFmpeg`/`FFprobe` commands in applications
-- Supports native platforms: Android, iOS, macOS and tvOS
+- Supports native platforms: Android, iOS, Linux, macOS and tvOS
 - Supports hybrid platforms: Flutter, React Native
-- Based on FFmpeg `v4.5-dev` with optional system and external libraries
+- Based on FFmpeg `v4.5-dev` or later with optional system and external libraries
 - 8 prebuilt binary packages available at [Github](https://github.com/arthenica/ffmpeg-kit/releases), [Maven Central](https://search.maven.org), [CocoaPods](https://cocoapods.org), [pub](https://pub.dev) and [npm](https://www.npmjs.com)
 - Licensed under `LGPL 3.0`, or `GPL v3.0` if GPL licensed libraries are enabled
 
@@ -29,28 +29,32 @@ See [Apple](apple) to use `FFmpegKit` on `Apple` platforms (`iOS`, `macOS`, `tvO
 
 See [Flutter](flutter/flutter) to learn more about `FFmpegKit` for `Flutter`.
 
-### 5. React Native
+### 5. Linux
+
+See [Linux](linux) to learn more about `FFmpegKit` for `Linux`.
+
+### 6. React Native
 
 See [React Native](react-native) to learn more about `FFmpegKit` for `React Native`.
 
-### 6. Build Scripts
+### 7. Build Scripts
 
-Use `android.sh`, `ios.sh`, `macos.sh` and `tvos.sh` to build `FFmpegKit` for each native platform.
+Use `android.sh`, `ios.sh`, `linux.sh`, `macos.sh` and `tvos.sh` to build `FFmpegKit` for each native platform.
 
 All scripts support additional options to enable optional libraries and disable platform architectures. See
 [Building](https://github.com/arthenica/ffmpeg-kit/wiki/Building) wiki page for the details.
 
-### 7. FFmpegKit Library
+### 8. FFmpegKit Library
 
 `FFmpegKit` is a wrapper library that allows you to easily run `FFmpeg`/`FFprobe` commands in applications. It 
 provides additional features on top of `FFmpeg` to enable platform specific resources, control how commands are 
 executed and how the results are handled.
 
 `Android` library of `FFmpegKit` has a `Java` API, `Apple` libraries (`iOS`, `macOS`, `tvOS`) have an `Objective-C`
- API, `Flutter`library comes with a `Dart` API and `React Native` library provides a `JavaScript` API, which are
- identical in terms of features and capabilities.
+ API, `Flutter` library comes with a `Dart` API, `Linux` library has a `C++` API and `React Native` library provides
+a `JavaScript` API with `Typescript` definitions, which are identical in terms of features and capabilities.
 
-### 8. Packages
+### 9. Packages
 
 There are eight different `ffmpeg-kit` packages distributed on 
 [Github](https://github.com/arthenica/ffmpeg-kit/releases), 
@@ -111,26 +115,30 @@ include them.
  - `VideoToolbox` is not available on LTS releases of `iOS` and `tvOS`
  - `zimg` is supported since `v4.5.1`
 
-### 9. Versions
+### 10. Versions
 
-`FFmpegKit` binaries generated use the same major and minor version numbers as the upstream `FFmpeg` project. 
+`FFmpegKit` binaries generated use the same major and minor version numbers as the upstream `FFmpeg` project. The
+third and last number in the version string, if exists, is specific to `FFmpegKit`. It shows different releases from
+the same `FFmpeg` release branch. 
 
-The exact version number of `FFmpeg` is obtained using `git describe --tags`. `dev` part in the version string 
-indicates that `FFmpeg` source code is cloned from the `FFmpeg` `master` branch. 
+`dev` part in the version string indicates that `FFmpeg` source code is cloned from the `FFmpeg` `master` branch and
+the exact version number of `FFmpeg` is obtained using the `git describe --tags` command.
 
 |    Platforms     |                                 FFmpegKit Version                                  | FFmpeg Version | Release Date |
-|:----------------:|:----------------------------------------------------------------------------------:| :------------: |:------------:|
-|   React Native   | [4.5.2](https://github.com/tanersener/ffmpeg-kit/releases/tag/react.native.v4.5.2) | 4.5-dev-3393 | May 25, 2022 |
-|     Flutter      |   [4.5.1](https://github.com/tanersener/ffmpeg-kit/releases/tag/flutter.v4.5.1)    | 4.5-dev-3393 | Jan 02, 2022 |
-|   React Native   | [4.5.1](https://github.com/tanersener/ffmpeg-kit/releases/tag/react.native.v4.5.1) | 4.5-dev-3393 | Jan 02, 2022 |
-|     Android      |       [4.5.1](https://github.com/tanersener/ffmpeg-kit/releases/tag/v4.5.1)        | 4.5-dev-3393 | Jan 01, 2022 |
-|      Apple       |       [4.5.1](https://github.com/tanersener/ffmpeg-kit/releases/tag/v4.5.1)        | 4.5-dev-3393 | Dec 30, 2021 |
-|     Flutter      |   [4.5.0](https://github.com/tanersener/ffmpeg-kit/releases/tag/flutter.v4.5.0)    | 4.5-dev-2008 | Oct 05, 2021 |
-|   React Native   | [4.5.0](https://github.com/tanersener/ffmpeg-kit/releases/tag/react.native.v4.5.0) | 4.5-dev-2008 | Oct 01, 2021 |
-| Android<br>Apple |         [4.5](https://github.com/tanersener/ffmpeg-kit/releases/tag/v4.5)          | 4.5-dev-2008 | Sep 18, 2021 |
-| Android<br>Apple |         [4.4](https://github.com/tanersener/ffmpeg-kit/releases/tag/v4.4)          | 4.4-dev-3015 | Mar 03, 2021 |
-
-### 10. LTS Releases
+|:----------------:|:----------------------------------------------------------------------------------:|:--------------:|:------------:|
+|     Android      |         [5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/v5.1)          |     5.1.2      | Sep 29, 2022 |
+|      Apple       |    [5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/v5.1)               |     5.1.2      | Sep 29, 2022 |
+|   React Native   | [4.5.2](https://github.com/arthenica/ffmpeg-kit/releases/tag/react.native.v4.5.2) |  4.5-dev-3393  | May 25, 2022 |
+|     Flutter      |   [4.5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/flutter.v4.5.1)    |  4.5-dev-3393  | Jan 02, 2022 |
+|   React Native   | [4.5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/react.native.v4.5.1) |  4.5-dev-3393  | Jan 02, 2022 |
+|     Android      |       [4.5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/v4.5.1)        |  4.5-dev-3393  | Jan 01, 2022 |
+|      Apple       |       [4.5.1](https://github.com/arthenica/ffmpeg-kit/releases/tag/v4.5.1)        |  4.5-dev-3393  | Dec 30, 2021 |
+|     Flutter      |   [4.5.0](https://github.com/arthenica/ffmpeg-kit/releases/tag/flutter.v4.5.0)    |  4.5-dev-2008  | Oct 05, 2021 |
+|   React Native   | [4.5.0](https://github.com/arthenica/ffmpeg-kit/releases/tag/react.native.v4.5.0) |  4.5-dev-2008  | Oct 01, 2021 |
+| Android<br>Apple |         [4.5](https://github.com/arthenica/ffmpeg-kit/releases/tag/v4.5)          |  4.5-dev-2008  | Sep 18, 2021 |
+| Android<br>Apple |         [4.4](https://github.com/arthenica/ffmpeg-kit/releases/tag/v4.4)          |  4.4-dev-3015  | Mar 03, 2021 |
+
+### 11. LTS Releases
 
 `FFmpegKit` binaries are published in two release variants: `Main Release` and `LTS Release`. 
 
@@ -160,26 +168,38 @@ This table shows the differences between two variants.
 | tvOS Architectures | arm64<br/>x86-64<br/>arm64-simulator |                     arm64<br/>x86-64                      |
 | tvOS Bundle Format | XCFrameworks |                        Frameworks                         |
 
-### 11. Documentation
+### 12. Documentation
 
 A more detailed documentation is available under [Wiki](https://github.com/arthenica/ffmpeg-kit/wiki).
 
-### 12. Test Applications
+### 13. Test Applications
 
 You can see how `FFmpegKit` is used inside an application by running test applications created under 
 [FFmpegKit Test](https://github.com/arthenica/ffmpeg-kit-test) project.
 
 All applications are identical and supports command execution, video encoding, accessing https urls, encoding audio,
 burning subtitles, video stabilisation, pipe operations and concurrent command execution.
 
-### 13. License
+### 14. License
+
+`FFmpegKit` library alone is licensed under the `LGPL v3.0`.
 
-`FFmpegKit` is licensed under the `LGPL v3.0`. However, if source code is built using the optional `--enable-gpl` flag
-or prebuilt binaries with `-gpl` postfix are used, then `FFmpegKit` is subject to the `GPL v3.0` license.
+`FFmpegKit` bundles (`.aar` archives, `frameworks`, `xcframeworks`), which include both  `FFmpegKit` and `FFmpeg`
+libraries, are also licensed under the `LGPL v3.0`. However, if the source code is built using the optional
+`--enable-gpl` flag or prebuilt binaries with `-gpl` postfix are used, then `FFmpegKit` bundles become subject to the
+`GPL v3.0`. Because, `FFmpeg` is licensed under the `GPL v3.0` in those bundles. And that makes the whole bundle
+effectively subject to the `GPL v3.0`.
 
-See the [License](https://github.com/arthenica/ffmpeg-kit/wiki/License) wiki page for the details.
+`FFmpegKit` build scripts always configure `FFmpeg` with `--enable-version3` option. And never enable non-free
+libraries. Thus, `FFmpeg` libraries created by `FFmpegKit` are licensed under the `LGPL v3.0` by default. Only when
+`--enable-gpl` is provided they become subject to `GPL v3.0`. That is how prebuilt binaries with `-gpl` postfix are
+compiled.
 
-### 14. Patents
+Refer to [Licenses](https://github.com/arthenica/ffmpeg-kit/wiki/Licenses) to see the licenses of all libraries.
+[Trademark](https://github.com/arthenica/ffmpeg-kit/wiki/Trademark) lists the trademarks used in the `FFmpegKit`
+documentation.
+
+### 15. Patents
 
 It is not clearly explained in their documentation, but it is believed that `FFmpeg`, `kvazaar`, `x264` and `x265`
 include algorithms which are subject to software patents. If you live in a country where software algorithms are
@@ -190,16 +210,11 @@ that you seek legal advice first. See [FFmpeg Patent Mini-FAQ](https://ffmpeg.or
 distribute that library, then you are subject to pay MPEG LA licensing fees. Refer to
 [OpenH264 FAQ](https://www.openh264.org/faq.html) page for the details.
 
-### 15. Contributing
-
-Feel free to submit issues or pull requests. 
+### 16. Contributing
 
-Please note that `main` includes only the latest released source code. Changes planned for the next release are
-developed under the `development` branches (`development` for native platforms, `development-react-native` for
-`react-native`, `development-flutter` for `flutter`). Therefore, if you want to create a pull request, please open it
- against them.
+See our [CONTRIBUTING](CONTRIBUTING.md) guide.
 
-### 16. See Also
+### 17. See Also
 
 - [FFmpeg API Documentation](https://ffmpeg.org/doxygen/4.0/index.html)
 - [FFmpeg Wiki](https://trac.ffmpeg.org/wiki/WikiStart)

android/README.md

@@ -77,7 +77,7 @@ All libraries created by `android.sh` can be found under the `prebuilt` director
     }
 
     dependencies {
-        implementation 'com.arthenica:ffmpeg-kit-full:4.5.1-1'
+        implementation 'com.arthenica:ffmpeg-kit-full:5.1'
     }
     ```
 

apple/README.md

@@ -111,17 +111,17 @@ All libraries created can be found under the `prebuilt` directory.
 
     - iOS
     ```yaml
-    pod 'ffmpeg-kit-ios-full', '~> 4.5.1'
+    pod 'ffmpeg-kit-ios-full', '~> 5.1'
     ```
 
     - macOS
     ```yaml
-    pod 'ffmpeg-kit-macos-full', '~> 4.5.1'
+    pod 'ffmpeg-kit-macos-full', '~> 5.1'
     ```
 
     - tvOS
     ```yaml
-    pod 'ffmpeg-kit-tvos-full', '~> 4.5.1'
+    pod 'ffmpeg-kit-tvos-full', '~> 5.1'
     ```
 
 2. Execute synchronous `FFmpeg` commands.