ffmpeg error when combining audio and mp4 file after decryption

[nobtiba]

Hi all,

I downloaded DRM audio and video file from mpd link. After that I used cdrm-project site to get the key. Then used mp4decrypt to decrypt each of them (on my Mac):
macbook@macbooksmacbook bin % ./mp4decrypt --show-progress --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b manifest.mp4 v_dec.mp4
macbook@macbooksmacbook bin % ./mp4decrypt --show-progress --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b manifest.m4a a_dec.mp4

And lastly, I use ffmpeg to combine them:
macbook@macbooksmacbook bin % ffmpeg -i v_dec.mp4 -i a_dec.mp4 -c copy final.mp4

And I always get this error:

[Attachment 84749 - Click to enlarge]

[Attachment 84750 - Click to enlarge]
How could I fix this error? Any help please! Tk you very much!

[lomero]

1. are you sure the key is correct? you can play v_dec.mp4 and listen a_dec.mp4 (and audio is m4a no mp4. mp4 is a container vid+audio)
2. if right key and you can play the step above, try with shaka instead mp4decrypt
3. the last way is re-download all video with N_m3u8DL-RE (also available for mac) and use this tool all-in-one to download, decrypt and merge your video + audio

[2nHxWW6GkN1l916N3ayz8HQoi]

I downloaded DRM audio and video file from mpd link

Can you write the MPD link?

[nobtiba]

I tried to play these downloaded audio and video file but I hear nothing and the video is black. Will try the N_m3u8DL-RE software
Sure, here is the mpd link:
https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd

[nobtiba]

I also tried the app:
./N_m3u8DL-RE2 https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b

it downloaded audio and video file but seems to be the same as previous download method.
How could I download and decrypt at the same time use N_m3u8DL-RE2?

[Frieren]

I also tried the app:
./N_m3u8DL-RE2 https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b

it downloaded audio and video file but seems to be the same as previous download method.
How could I download and decrypt at the same time use N_m3u8DL-RE2?

wrong key

cenc:default_KID="72740348-c0fd-e869-0a5a-abe50a23e58f"

[Frieren]

I tried to play these downloaded audio and video file but I hear nothing and the video is black. Will try the N_m3u8DL-RE software
Sure, here is the mpd link:
https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd

and the link is exactly same as this thread:
https://forum.videohelp.com/threads/405517-A-TV-series-from-mewatch-sg

Hi everyone, I wanna download a TV series that I like on this website, and I'm wondering if anyone could help me, or would you mind telling me how to download it by commenting below so I could learn it by myself and not to bother y'all the next time.
Its name is mewatch.sg
and the exact page is here: https://www.mewatch.sg/watch/Heart-(Not)-Vacant-E1-281131
I've heard something about mpd, and I tried to search ".mpd" in this website, and found this mpd file:

the url is https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_c...t/manifest.mpd

and after I opened it, it showed like this:

[Attachment 64489 - Click to enlarge]

these are what I've found till now, and I'd appreciate it if anyone could tell me how to download these videos.
'cause learning how to download videos is also an interesting knowledge to me.
Thank you in advance!

[nobtiba]

I also tried the app:
./N_m3u8DL-RE2 https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b

it downloaded audio and video file but seems to be the same as previous download method.
How could I download and decrypt at the same time use N_m3u8DL-RE2?

wrong key

cenc:default_KID="72740348-c0fd-e869-0a5a-abe50a23e58f"

How do I get the right key then? I get it from cdrm-project.com because it seems that I cannot get verify from discord to use getwvkeys.cc
Could you please show me how to get the right key and what is it then? Thank you.

(And thank you for figure out the other post with the same link, looks like there is someone with the same interest! )

[nobtiba]

I also tried the app:
./N_m3u8DL-RE2 https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b

it downloaded audio and video file but seems to be the same as previous download method.
How could I download and decrypt at the same time use N_m3u8DL-RE2?

wrong key

cenc:default_KID="72740348-c0fd-e869-0a5a-abe50a23e58f"

I tried again using WidevineProxy2 and it is exactly the same key, why your key looks different? Please refer to the screenshot below:

[Attachment 84849 - Click to enlarge]

[nobtiba]

I tried another command:
./N_m3u8DL-RE https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_m...t/manifest.mpd --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e 38a561fe468989b --use-shaka-packager -M format=mkv

It also can download 2 files: audio and video but seems to face error as well, the process keeps going forever

[Attachment 84853 - Click to enlarge]

[Attachment 84854 - Click to enlarge]

[Attachment 84855 - Click to enlarge]

[shellcmd]

wrong key, so maybe you mixed something, perphaps you posted another mpd not the correct one.

then, post the whole info you have from browser and widevine proxy2.
include title/video url in browser/ the pssh/key/mpd url/command widevineproxy2 give you

and we can compare if the mpd url match your provided in the begining:

https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_mlfhhs6w/v/11/pv/1/ev/21/flavorId/1_,8z37vsf4,koqurzqd,5qeedexj,tyqp0nqx,po2q2uxv,wr4kofht,/forceproxy/true/name/a.mp4.urlset/manifest.mpd

[nobtiba]

Here is the link:
https://www.mewatch.sg/watch/ASEAN-Mitsubishi-Electric-Cup-2024-E28-Thailand-vs-Vietna...?redirect=true
Here is the mpd I get manually from the website by inspecting on chrome:
https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_b...t/manifest.mpd

And here is the screenshot
of the Title

[Attachment 84881 - Click to enlarge]
And the the pssh/key/mpd url/command widevineproxy2 give me

[Attachment 84876 - Click to enlarge]
The JSON log I get from Widevine proxy2 is attached.

[shellcmd]

yes, you got something wrong, because you posted a wrong mpd url at #4 in this thread:

https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_mlfhhs6w/v/11/pv/1/ev/21/flavorId/1_,8z37vsf4,koqurzqd,5qeedexj,tyqp0nqx,po2q2uxv,wr4kofht,/forceproxy/true/name/a.mp4.urlset/manifest.mpd

but widevine proxy2 give you the correct one:

https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_bnlljx0i/v/1/pv/1/ev/14/flavorId/1_,metomoiq,msa0nkva,cnqfz5ve,95kcu7cc,6eidkzk1,8ohhfhk1,/forceproxy/true/name/a.mp4.urlset/manifest.mpd

the key:

--key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e38a561fe468989b

use correct mpd and keys widevine proxy2 gived you it should work:

./N_m3u8DL-RE "https://k-toggle.akamaized.net/edashncl/p/2082311/sp/208231100/serveFlavor/entryId/1_bnlljx0i/v/1/pv/1/ev/14/flavorId/1_,metomoiq,msa0nkva,cnqfz5ve,95kcu7cc,6eidkzk1,8ohhfhk1,/forceproxy/true/name/a.mp4.urlset/manifest.mpd" --key 57624cb3bdf5794c1eee91c627e3ffd7:bf938727cdb7d3f2e38a561fe468989b --use-shaka-packager -M format=mkv -mt

[nobtiba]

Thank you very much, @shellcmd and everyone else for helping me figure it out. What a mistake I made! It solved all the issues and it is working now. Now I know how to use widevine proxy2 too, that is a great tool! Good day everyone, tks again!