AUBC fails to download audio

[FrankZ85]

Recently, I cannot download from AUBC because audio download fails. I'm filing this against the service, because other service still work fine.

The symptoms are that the download (using devine/unshackle) ends with a SEGV in shaka packager.

CalledProcessError: Command 
'['input=/tmp/devine/Audio_7f2c89c3.mp4,stream=0,output=/tmp/devine/Audio_7f2c89
c3_decrypted.mp4,output_format=MP4', '--enable_raw_key_decryption', '--keys', 
'label=0:key_id=1d4eb31aadd14a6e8dd8157cd9500dfd:key=7bb1ae23552607d46f9342b0921
9c4fc,label=1:key_id=00000000000000000000000000000000:key=7bb1ae23552607d46f9342
b09219c4fc', '--temp_dir', PosixPath('/tmp/devine')]' died with 
<Signals.SIGSEGV: 11>.

Before that everything looks fine in the devine output. The audio track is detected correcty.

At least part of the problem seems to be that /tmp/devine/Audio_7f2c89c3.mp4 is never created.. (I commented out path.unlink() and the file does not exist even after that.)
I do see a file with increasing size in the temp directory, though. If I observed correctly, it might even be downloaded twice, jumping back to file size 0 at some point.

After the error, an empty packager-tempfile-18dff9-a69aaba3d14db304-1 is left over.

I tried copying the partial audiofile and use mp4decode with the displayed keys, but this return a very small output file.

To reproduce, just download any audio, e.g.
devine dl -A AUBC https://iview.abc.net.au/video/ZW5023A008S00

BTW: It seems that the 720 to 1080 replacement is no longer needed. While debugging, I saw 1080 entries in the video information JSON.

[stabbedbybrick]

I've tested multiple episodes, including your example, and they all download and decrypt properly. Since your issue is related to the download and/or decryption process, I'd say this is probably more about your setup and how it's working with Unshackle itself. The service script only handles API stuff.

If you're not using them already, I'd recommend latest n_m3ud8l_re and shaka-packager v2.6.1.

[FrankZ85]

You're right. Using n_m3u8dl_re as downloaded (as opposed to requests) lets me download the files.

But then, I'm not able to play the audio. There's lots of warnings about illegal AAC encoding.

Did you just download or also play the files?

[stabbedbybrick]

Yes, I've tested playing the files and there were no issues.

Mediainfo also doesn't indicate anything strange:

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 43 min 55 s
Bit rate                                 : 128 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 40.2 MiB (5%)
Language                                 : English
Default                                  : Yes
Forced                                   : No

I really don't know why you're having problems with this service alone and not others, but since you get the manifest and keys all right, the script has done its job and the rest is down to Unshackle processes. It might be worth taking the issue over there for this one.

[FrankZ85]

Yes, it's just this service. Just downloaded from another one, there all is fine. I just downloaded 8 episodes from AUBC, all are broken in the same way. Video is fine, audio can't be decoded.

One final question: Do you have a login configured for AUBC? I don't. Maybe you get other media presented?

[FrankZ85]

ffprobe says

[aac @ 0x5651ed863e00] channel element 2.8 is not allocated
Input #0, matroska,webm, from 'Blue.Murder.Motel.S01E02.Home.Is.Where.You.Park.It.AUBC.WEB-DL.AAC2.0.mka':
  Metadata:
    title           : Blue Murder Motel S01E02 Home Is Where You Park It
    encoder         : libebml v1.4.5 + libmatroska v1.7.1
  Duration: 00:44:41.07, start: 0.000000, bitrate: 129 kb/s
  Stream #0:0(eng): Audio: aac (LC), 44100 Hz, stereo, fltp (default) (original)
    Metadata:
      BPS             : 128000
      DURATION        : 00:44:41.068832082
      NUMBER_OF_FRAMES: 115464
      NUMBER_OF_BYTES : 42897102
      _STATISTICS_WRITING_APP: mkvmerge v97.0 ('You Don't Have A Clue') 64-bit
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

So a lot of information is correct.
But when I try to play it, the one problem mentioned is enough to void the attempt.

[FrankZ85]

mediainfo says

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 45 min 32 s
Bit rate                                 : 128 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 41.7 MiB (4%)
Language                                 : English
Default                                  : Yes
Forced                                   : No
Errors                                   : Missing ID_END
Conformance errors                       : 1
 AAC                                     : Yes
  General compliance                     : Bitstream parsing ran out of data to read before the end of the syntax was reached, most probably the bitstream is malformed (conf, offset 0x59CF4D)

[stabbedbybrick]

One final question: Do you have a login configured for AUBC? I don't. Maybe you get other media presented?

Since it's not needed, there's no login flow at all in the script.

You can try updating Unshackle and ffmpeg if you haven't already done so. Otherwise, I unfortunately don't have any ideas.

[FrankZ85]

I just updated to the latest unshackle and also tried devine on another PC. All the same.

[stabbedbybrick]

I really can't reproduce this error, so there's not much I can do on my end. This is more related to your setup and/or with Unshackle.

[FrankZ85]

I checked and the last time I certainly downloaded from that site was mid January. Back then everything went fine. I'll try to find out which versions I was using at the time.

[FrankZ85]

For those affected: Ozivine https://github.com/billybanana80/ozivine/blob/master/services/abciview/abc.py works fine for me.