Can't play widevine encrypted video after decrypted

[hkghtk]

Hi there,

I had downloaded the fragments from

https://bcovlive-a.akamaihd.net/664b4abdb2634e14b39426e5f836747b/ap-northeast-1/6160987587001/playlist_wv.m3u8

it is an ended mpeg-dash stream, and I found the wv keys is

b35ba32acf43e2865cb0771219af08d5:989d4b0938b6902471a10d77c0db753b

So, what I had done is merged the fragments with the init file in CMD by

copy /B init.mp4+4900.m4s+4901.m4s+4902.m4s enc.mp4

and then I used mp4decrypt to decrypt the merged fragments

mp4decrypt --key b35ba32acf43e2865cb0771219af08d5:989d4b0938b6902471a10d77c0db753b enc.mp4 dec.mp4

the MPC player is able to open the video file, however, it cannot start to play, there is black and no audio.

Does anyone know what I have missed?

Thanks.

[ROYTFZ]

How did you get the keys? Is the keys correct?

[hkghtk]

How did you get the keys? Is the keys correct?

the key get from getwvkeys, I've tried decrypt with shaka packager is success and playable, but the audio track and video track is spearated

[lomero]

join manually with ffmpeg

ffmpeg -i video.mp4 -i audio.m4a -c copy final_video.mp4

[mkdnrdo]

How did you get the keys? Is the keys correct?

the key get from getwvkeys, I've tried decrypt with shaka packager is success and playable, but the audio track and video track is spearated

I have the same problem on this site with today’s stream. May I know how to decrypt by shaka packager? Thanks.

[hkghtk]

join manually with ffmpeg

edit: I see your command after I submit this reply, thanks I am able to merge it now

------

do you mean concatenate the media fragments (m4s)? can you teach me the command?

i wrote the list.txt

file 'c:\test\0000.mp4' 
file 'c:\test\738.m4s' 
file 'c:\test\739.m4s'
file 'c:\test\740.m4s'

and run with command:

ffmpeg -f concat -safe 0 -i list.txt target.mp4

ffmpeg returns error

ffmpeg version 5.0.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (Rev7, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] Could not find codec parameters for stream 1 (Video: h264 (avc1 / 0x31637661), none, 1920x1080): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] Auto-inserting h264_mp4toannexb bitstream filter
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] could not find corresponding trex (id 2)
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] could not find corresponding track id 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] trun track id unknown, no tfhd was found
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f07753e340] error reading header
[concat @ 000001f0775216c0] Impossible to open 'c:\test\739.m4s'
[concat @ 000001f0775216c0] Could not find codec parameters for stream 1 (Video: h264 (avc1 / 0x31637661), none, 1920x1080): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, concat, from 'list.txt':
  Duration: N/A, bitrate: 189 kb/s
  Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s
    Metadata:
      handler_name    : Brightcove m4f generator
      vendor_id       : [0][0][0][0]
  Stream #0:1(und): Video: h264 (avc1 / 0x31637661), none, 1920x1080, SAR 1:1 DAR 16:9, 90k tbr, 90k tbn
    Metadata:
      handler_name    : Brightcove m4f generator
      vendor_id       : [0][0][0][0]
    Side data:
      unknown side data type 24 (169 bytes)
Stream mapping:
  Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:0 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
concate.txt: I/O error
Cannot determine format of input stream 0:1 after EOF
Error marking filters as finished
Conversion failed!

the files is not the same with the stream I provided at top but is download from same stream provider and ffmpeg returns similar error message