markdown FFMPEG优化YouTube视频

Posted 2021-05-06

### Command

``` bash
$ ffmpeg -i <input file> -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart <output_name>.mp4
```

### Function

``` bash
function youtube () {
	( ffmpeg -i $1 -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart $2.mp4 )
}
```

Source from this [article](https://www.virag.si/2015/06/encoding-videos-for-youtube-with-ffmpeg/)