> For the complete documentation index, see [llms.txt](https://easonwang.gitbook.io/web_advance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://easonwang.gitbook.io/web_advance/ffmpeg.md).

# FFmpeg

{% embed url="<https://www.ffmpeg.org/>" %}

下載: <https://www.ffmpeg.org/download.html>

## 剪輯影片

> 有其影片如果只剪輯前三秒會有誤差

```
 ffmpeg -ss 00:01:00 -i input.mp4 -to 00:02:00 -c copy output.mp4
```

{% embed url="<https://stackoverflow.com/questions/18444194/cutting-the-videos-based-on-start-and-end-time-using-ffmpeg>" %}

## 合併影片

先新增一個 vidlist.txt 裡面要放合併的影片列表

```
file 'output0.mkv'
file 'output.mkv'
```

```
ffmpeg -f concat -i vidlist.txt -c copy out.mp4
```

<https://stackoverflow.com/a/49373401/4622645>