update readme

pull/209/head
xufuji456 3 years ago
parent eea78da2d3
commit 7c228b941b
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      README.md

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### 运行时序图:
![preview](https://github.com/xufuji456/FFmpegAndroid/blob/master/picture/ffmpeg_sequence.png)
### Usage:
### (1) Transform video format:
Select video file which you want to transform, and setting the output path.<br>
The simple command like this:<br>
ffmpeg -i %s -vcodec copy -acodec copy %s<br>
You could appoint the encoder, like this:<br>
ffmpeg -i %s -vcodec libx264 -acodec libmp3lame %s<br>
You could transform the video resolution, like this:<br>
ffmpeg -i %s -s 1080x720 %s<br>
### (2) Probing media format:
Select video or audio file from your file explorer, and click the button.<br>
When it finishes probing, the result of metadata will display on screen.<br>
### Joining the group to learn FFmpeg:
![preview](https://github.com/xufuji456/FFmpegAndroid/blob/master/picture/ffmpeg_group.png)

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