Readme update

Author: markus-perl

README.md

@@ -2,28 +2,29 @@
 
 ![FFmpeg build script](https://raw.github.com/markus-perl/ffmpeg-build-script/master/ffmpeg-build-script.png)
 
+### If you like the script, please "★" this project!
 
 build-ffmpeg
 ==========
 
-The FFmpeg build script provides an easy way to build a static FFmpeg on **macOS** and **Linux** with **non-free codecs** included.
-
+The FFmpeg build script provides an easy way to build a static FFmpeg on **macOS** and **Linux** with ** non-free
+codecs** included.
 
 [![How-To build FFmpeg on MacOS](https://img.youtube.com/vi/Z9p3mM757cM/0.jpg)](https://www.youtube.com/watch?v=Z9p3mM757cM "How-To build FFmpeg on OSX")
 
-*Youtube: How-To build and install FFmpeg on MacOS*
-
+*Youtube: How-To build and install FFmpeg on macOS*
 
 ## Disclaimer And Data Privacy Notice
-This script will download different packages with different licenses from various sources, which may track your usage. 
-These sources are out of control by the developers of this script. By downloading and using this script, you are fully aware of this.
 
-Use this script at your own risk. I maintain this script in my spare time.
-Please do not file bug reports for systems other than Debian 10 and macOS 11.x,
-because I don't have the resources or time to maintain different systems.
+This script will download different packages with different licenses from various sources, which may track your usage.
+These sources are out of control by the developers of this script. By downloading and using this script, you are fully
+aware of this.
 
+Use this script at your own risk. I maintain this script in my spare time. Please do not file bug reports for systems
+other than Debian 10 and macOS 11.x, because I don't have the resources or time to maintain different systems.
 
 ## Supported Codecs
+
 * `x264`: H.264 Video Codec (MPEG-4 AVC)
 * `x265`: H.265 Video Codec (HEVC)
 * `libsvtav1`, SVT-AV1 Encoder and Decoder
@@ -41,7 +42,10 @@ because I don't have the resources or time to maintain different systems.
 * `webp`: Image format both lossless and lossy
 
 ### HardwareAccel
-* `nv-codec`: [NVIDIA's GPU accelerated video codecs](https://devblogs.nvidia.com/nvidia-ffmpeg-transcoding-guide/). These encoders/decoders will only be available if a CUDA installation was found while building the binary. Follow [these](#Cuda-installation) instructions for installation. Supported codecs in nvcodec:
+
+* `nv-codec`: [NVIDIA's GPU accelerated video codecs](https://devblogs.nvidia.com/nvidia-ffmpeg-transcoding-guide/).
+  These encoders/decoders will only be available if a CUDA installation was found while building the binary.
+  Follow [these](#Cuda-installation) instructions for installation. Supported codecs in nvcodec:
     * Decoders
         * H264 `h264_cuvid`
         * H265 `hevc_cuvid`
@@ -55,7 +59,9 @@ because I don't have the resources or time to maintain different systems.
     * Encoders
         * H264 `nvenc_h264`
         * H265 `nvenc_hevc`
-* `vaapi`: [Video Acceleration API](https://trac.ffmpeg.org/wiki/Hardware/VAAPI). These encoders/decoders will only be available if a libva driver installation was found while building the binary. Follow [these](#Vaapi-installation) instructions for installation. Supported codecs in vaapi:
+* `vaapi`: [Video Acceleration API](https://trac.ffmpeg.org/wiki/Hardware/VAAPI). These encoders/decoders will only be
+  available if a libva driver installation was found while building the binary. Follow [these](#Vaapi-installation)
+  instructions for installation. Supported codecs in vaapi:
     * Encoders
         * H264 `h264_vaapi`
         * H265 `hevc_vaapi`
@@ -65,16 +71,20 @@ because I don't have the resources or time to maintain different systems.
         * VP9 `vp9_vaapi`
 
 ### Apple M1 (Apple Silicon) Support
+
 The script also builds FFmpeg on a new MacBook with an Apple Silicon M1 processor.
 
 ### LV2 Plugin Support
+
 If Python is available, the script will build a ffmpeg binary with lv2 plugin support.
 
-## Continuos Integration
-ffmpeg-build-script is rockstable. Every commit runs against Linux and MacOS with https://github.com/markus-perl/ffmpeg-build-script/actions just to make sure everything works as expected.
+## Continuous Integration
 
+ffmpeg-build-script is very stable. Every commit runs against Linux and macOS
+with https://github.com/markus-perl/ffmpeg-build-script/actions to make sure everything works as expected.
 
 ## Requirements
+
 ### macOS
 
 * XCode 10.x or greater
@@ -96,7 +106,7 @@ $ sudo dnf install @development-tools curl
 
 ### Quick install and run (macOS, Linux)
 
-Open your command line and run (needs curl to be installed):
+Open your command line and run (curl needs to be installed):
 
 ```bash
 $ bash <(curl -s "https://raw.githubusercontent.com/markus-perl/ffmpeg-build-script/master/web-install.sh?v1")
@@ -114,31 +124,38 @@ $ ./build-ffmpeg --help
 
 ### Build in Docker (Linux)
 
-With Docker, FFmpeg can be built reliably without altering the host system.
-Also, there is no need to have the CUDA SDK installed outside of the Docker image.
+With Docker, FFmpeg can be built reliably without altering the host system. Also, there is no need to have the CUDA SDK
+installed outside of the Docker image.
 
 A Docker engine with version 19.03 or higher is required to build images based on the following distributions:
+
 * Ubuntu >= 16.04 (16.04, 18.04, 20.04)
 * Centos >= 7 (7, 8)
 
 1. Enable Docker BuildKit
+
 ```bash
 $ export DOCKER_BUILDKIT=1
 ```
 
-2. Set the DIST (`ubuntu` or `centos`) and VER (ubuntu: `16.04` , `18.04`, `20.04` or centos: `7`, `8`) environment variables to select the preferred Docker base image.
+2. Set the DIST (`ubuntu` or `centos`) and VER (ubuntu: `16.04` , `18.04`, `20.04` or centos: `7`, `8`) environment
+   variables to select the preferred Docker base image.
+
 ```bash
 $ export DIST=centos
 $ export VER=8
 ```
 
 3. Start the build as follows.
+
 ```bash
 $ sudo -E docker build --tag=ffmpeg:cuda-$DIST -f cuda-$DIST.dockerfile --build-arg VER=$VER .
 ```
 
-4. Build an `export.dockerfile` that copies only what you need from the image you just built as follows. When running, move the library in the lib to a location where the linker can find it or set the `LD_LIBRARY_PATH`.
-Since we have matched the operating system and version, it should work well with dynamic links. If it doesn't work, edit the `export.dockerfile` and copy the necessary libraries and try again.
+4. Build an `export.dockerfile` that copies only what you need from the image you just built as follows. When running,
+   move the library in the lib to a location where the linker can find it or set the `LD_LIBRARY_PATH`. Since we have
+   matched the operating system and version, it should work well with dynamic links. If it doesn't work, edit
+   the `export.dockerfile` and copy the necessary libraries and try again.
 
 ```bash
 $ sudo -E docker build --output type=local,dest=build -f export.dockerfile --build-arg DIST=$DIST .
@@ -151,16 +168,20 @@ libnppc.so.11 libnppicc.so.11 libnppidei.so.11 libnppig.so.11
 ```
 
 ### Build in Docker (full static ver.) (Linux)
-If you're running an operating system other than the one above, a completely static build may work.
-To build a full statically linked binary inside Docker, just run the following command:
+
+If you're running an operating system other than the one above, a completely static build may work. To build a full
+statically linked binary inside Docker, just run the following command:
+
 ```bash
 $ sudo -E docker build --tag=ffmpeg:cuda-static --output type=local,dest=build -f full-static.dockerfile .
 ```
 
 ### Run with Docker (macOS, Linux)
+
 You can also run the FFmpeg directly inside a Docker container.
 
 #### Default - Without CUDA (macOS, Linux)
+
 If CUDA is not required, a dockerized FFmpeg build can be executed with the following command:
 
 ```bash
@@ -169,9 +190,12 @@ $ sudo docker run ffmpeg -i https://files.coconut.co.s3.amazonaws.com/test.mp4 -
 ```
 
 #### With CUDA (Linux)
-To use CUDA from inside the container, the installed Docker version must be >= 19.03.
-Install the driver and `nvidia-docker2` from [here](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html#installing-docker-ce).
+
+To use CUDA from inside the container, the installed Docker version must be >= 19.03. Install the driver
+and `nvidia-docker2`
+from [here](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html#installing-docker-ce).
 You can then run FFmpeg inside Docker with GPU hardware acceleration enabled, as follows:
+
 ```bash
 $ sudo docker build --tag=ffmpeg:cuda -f cuda-ubuntu.dockerfile .
 $ sudo docker run --gpus all ffmpeg-cuda -hwaccel cuvid -c:v h264_cuvid -i https://files.coconut.co.s3.amazonaws.com/test.mp4 -c:v hevc_nvenc -vf scale_npp=-1:1080 - > test.mp4
@@ -189,13 +213,14 @@ $ ./build-ffmpeg --build
 
 ## Cuda installation
 
-CUDA is a parallel computing platform developed by NVIDIA.
-To be able to compile ffmpeg with CUDA support, you first need a compatible NVIDIA GPU.
-- Ubuntu: To install the CUDA toolkit on Ubuntu, simply run "sudo apt install nvidia-cuda-toolkit"
+CUDA is a parallel computing platform developed by NVIDIA. To be able to compile ffmpeg with CUDA support, you first
+need a compatible NVIDIA GPU.
+
+- Ubuntu: To install the CUDA toolkit on Ubuntu, run "sudo apt install nvidia-cuda-toolkit"
 - Other Linux distributions: Once you have the GPU and display driver installed, you can follow the
-[official instructions](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html)
-or [this blog](https://www.pugetsystems.com/labs/hpc/How-To-Install-CUDA-10-1-on-Ubuntu-19-04-1405/)
-to setup the CUDA toolkit.
+  [official instructions](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html)
+  or [this blog](https://www.pugetsystems.com/labs/hpc/How-To-Install-CUDA-10-1-on-Ubuntu-19-04-1405/)
+  to setup the CUDA toolkit.
 
 ## Vaapi installation
 
@@ -223,8 +248,9 @@ Options:
 ```
 
 ## Notes of static link
-- Because of the NSS (Name Service Switch), glibc does **not recommend** static links.
-  See detail below: https://sourceware.org/glibc/wiki/FAQ#Even_statically_linked_programs_need_some_shared_libraries_which_is_not_acceptable_for_me.__What_can_I_do.3F
+
+- Because of the NSS (Name Service Switch), glibc does **not recommend** static links. See detail
+  below: https://sourceware.org/glibc/wiki/FAQ#Even_statically_linked_programs_need_some_shared_libraries_which_is_not_acceptable_for_me.__What_can_I_do.3F
 
 - The libnpp in the CUDA SDK cannot be statically linked.
 - Vaapi cannot be statically linked.
@@ -234,7 +260,6 @@ Contact
 
 * Github: [http://www.github.com/markus-perl/](https://github.com/markus-perl/ffmpeg-build-script)
 
-
 Tested on
 ---------
 
@@ -693,7 +718,7 @@ avfoundation            lavfi
 Enabled outdevs:
 sdl2
 
-License: nonfree and unredistributable
+License: non-free and unredistributable
 $ make -j 12
 $ make install
 
@@ -707,12 +732,12 @@ Password:
 Done. FFmpeg is now installed to your system.
 ```
 
-
 Other Projects Of Mine
 ------------
+
 - [Pushover CLI Client](https://github.com/markus-perl/pushover-cli)
 - [Gender API](https://gender-api.com): [Genderize A Name](https://gender-api.com)
 - [Gender API Client PHP](https://github.com/markus-perl/gender-api-client)
 - [Gender API Client NPM](https://github.com/markus-perl/gender-api-client-npm)
 - [Genderize Names](https://www.youtube.com/watch?v=2SLIAguaygo)
-- [Genderize API](https://gender-api.io)
+- [Genderize API](https://gender-api.io)