ffmpeg -i 'http://xx.com/xx.m3u8' -c copy -bsf:a aac_adtstoasc xx.mp4
# 修改User-Agent
ffmpeg -i 'http://xx.com/xx.m3u8' -c copy -bsf:a aac_adtstoasc xx.mp4 -user-agent "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36"