Unable to find a suitable output

ffmpeg -i /sdcard/DCIM/Camera/aaaaa%d.jpg /sdcard/DCIM/Camera/output.mp4
```

使用ffmpeg 命令将Camera文件夹下的的图片转为视频时报错

```
Unable to find a suitable output format for 'ffmpeg'
ffmpeg: Invalid argument
```

把ffmpeg去掉即可

-i /sdcard/DCIM/Camera/aaaaa%d.jpg /sdcard/DCIM/Camera/output.mp4