您必须将其添加到库中;在该评论中链接到的wiki（不是答案）是一个很好的开始，还要检查 https://ffmpeg.org/developer.html#New-codecs-or-formats-checklist 。

You have to add it to the library internally; the wiki linked to in that comment (not an answer?) is a good place to start, and also check https://ffmpeg.org/developer.html#New-codecs-or-formats-checklist.

最内部实用程序不导出，所以它不像外部编解码器支持将是有用的。

Most internal utilities aren't exported, so it's not as if external codec support would be useful.