Duration problem with audio files *.m4s

[liongtwap]

Hi, I have 2 audios in cantonese and dubbing chinese. These audios actually in 1 video (the video has 2 audio = cantonese and chinese). The real duration audio is 45:53 but when I tried to contanitate 1 audio, its only contain 16minutes, so I need help how to make full length duration with 2 different language.

This is what I do =
1. Rename 1 type audio (277files) to be sort numbers, i.e = audioA001.m4s - audioA277.m4s
2. Contatinate them using InviDownloader to be audioA.m4s (about 33Mb)
3. use mp4decrypt to change m4s to m4a

mp4decrypt --key KID:KEYS audioA.m4s audioA.m4a

KID:KEYS = a99f058682a248d875e231c74f407eb6:ba232972e580f9b9f 718feda35d1d54a
(I still don't know how to get the keys, I just get from this post = https://forum.videohelp.com/threads/403466-Trying-to-download-video-from-encrypted-mpd)

The audio can be play normally, but the problem is duration is to short about 16minutes, please help...

This is the link of m4s files

Thanks

[karapuz]

https://forum.videohelp.com/threads/400793-How-to-merge-m4s-segments

[liongtwap]

I tried curl command from the link and its very slow, so I tried MS-DOS command, without installing new software. It's very easy and it's worked, YEAH!!

copy /b "audioA*.m4s" "audioA.m4a"

after that, the decrypted audioA.m4a must be unlock use by mp4decrypt, and it worked!