mkdir .\audio 
mkdir.\video

curl "https://vsa.play.kakao.com/vod/rvst2axy846krhz8jz76mk6f3/vhs/a_t0_96-44100/96-44100_init.m4s?px-time=1602511073&px-hash=0bf0bc7ecc2ca5486e3ed3a334b86299&px-path=%2Fvod%2Frvst2axy846krhz8jz76mk6f3%2Fvhs%2F&credential=TuMuFGKUIcirOSjFzOpncbomGFEIdZWK&expires=1602514673&signature=eUfvEU6yhdOETrRkShro9EhCHEI%3D&prefix=/dna/kamp/vod/rvst2axy846krhz8jz76mk6f3/vhs" -o ".\audio\init.m4s"
curl "https://vsa.play.kakao.com/vod/rvst2axy846krhz8jz76mk6f3/vhs/a_t0_96-44100/96-44100_[000000-000188].m4s?px-time=1602511073&px-hash=0bf0bc7ecc2ca5486e3ed3a334b86299&px-path=%2Fvod%2Frvst2axy846krhz8jz76mk6f3%2Fvhs%2F&credential=TuMuFGKUIcirOSjFzOpncbomGFEIdZWK&expires=1602514673&signature=eUfvEU6yhdOETrRkShro9EhCHEI%3D&prefix=/dna/kamp/vod/rvst2axy846krhz8jz76mk6f3/vhs" -o ".\audio\#1.m4s"

curl "https://vsa.play.kakao.com/vod/rvst2axy846krhz8jz76mk6f3/vhs/v_t0_HIGH4/HIGH4_init.m4s?px-time=1602511073&px-hash=0bf0bc7ecc2ca5486e3ed3a334b86299&px-path=%2Fvod%2Frvst2axy846krhz8jz76mk6f3%2Fvhs%2F&credential=TuMuFGKUIcirOSjFzOpncbomGFEIdZWK&expires=1602514673&signature=eUfvEU6yhdOETrRkShro9EhCHEI%3D&prefix=/dna/kamp/vod/rvst2axy846krhz8jz76mk6f3/vhs" -o ".\video\init.m4s" 
curl "https://vsa.play.kakao.com/vod/rvst2axy846krhz8jz76mk6f3/vhs/v_t0_HIGH4/HIGH4_[000000-000188].m4s?px-time=1602511073&px-hash=0bf0bc7ecc2ca5486e3ed3a334b86299&px-path=%2Fvod%2Frvst2axy846krhz8jz76mk6f3%2Fvhs%2F&credential=TuMuFGKUIcirOSjFzOpncbomGFEIdZWK&expires=1602514673&signature=eUfvEU6yhdOETrRkShro9EhCHEI%3D&prefix=/dna/kamp/vod/rvst2axy846krhz8jz76mk6f3/vhs" -o ".\video\#1.m4s" 

copy /b .\audio\init.m4s+.\audio\0*.m4s  audio.m4s
copy /b .\video\init.m4s+.\video\0*.m4s  video.m4s

ffmpeg -i video.m4s -c:a copy video.mp4
ffmpeg -i video.mp4 -i audio.m4s -c:v copy -c:a copy video_audio_merged.mp4

rm video.mp4 audio.m4s video.m4s