Update README

README.md

@@ -1,2 +1,62 @@
 # FFmpeg-Invoker
 FFmpeg invoker
+
+## Download
+```groovy
+implementation 'com.github.xch168:ffmpeg-invoker:0.0.1'
+```
+The Library supports three cpu abi: `armeabi-v7a`, `arm64-v8a`, `x86`.
+If you don't an x86 lib, you can exclude it according to the following configuration:
+```groovy
+android {
+    ...
+    packagingOptions {
+        exclude 'lib/x86/*.so'
+    }
+}
+```
+
+## Usage
+```java
+String cmd = "ffmpeg -y -ss 1 -t 100 -accurate_seek -i " + videoPath + " -codec copy " + savePath;
+FFmpegInvoker.exec(cmd.split(" "), 100, new FFmpegInvoker.Callback() {
+    @Override
+    public void onSuccess() {
+
+    }
+
+    @Override
+    public void onFailure() {
+
+    }
+
+    @Override
+    public void onProgress(float progress) {
+
+    }
+});
+```
+
+## Build FFmpeg
+```shell script
+$ git clone git@github.com:xch168/FFmpeg-Invoker.git
+$ cd FFmpeg-Invoker
+$ ./build_ffmpeg.sh
+````
+
+License
+-------
+
+    Copyright (c) 2020-present. xch168
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.