https://lele1894.blogspot.com/2022/04/blog-post.html
youtube小姐姐
https://www.youtube.com/watch?v=XbkR4hWo_W8
https://www.youtube.com/@the_influencer_/videos
bilibili直播rtmp推流链接 https://link.bilibili.com/p/center/index#/my-room/start-live
OBS其直播推流及视频录制教程 https://www.bilibili.com/read/cv6446984?spm_id_from=333.999.0.0
merge two webm files (video and audio) in ffmpeg
ffmpeg -i video.webm -i audio.webm -c copy output.mkv