Audio from tiktok is not downloading. 0 bytes error

[bandicuttt]

problem description

I'm using the latest version of cobalt. When I try to download a tiktok consisting of pictures + audio, I get pictures, but I can't download audio. Surprisingly, if I try to download with the parameter “”downloadMode“: ‘audio’”, the audio is downloaded normally. The same behavior I observe on the main.

Pictures separately -- ok Audio separately -- ok Audio + pictures -- not ok

your instance configuration

cobalt-api    |
cobalt-api    | cobalt API ^ω⁠^
cobalt-api    | ~~~~~~
cobalt-api    | version: 10.4.4
cobalt-api    | commit: 5973d70053a6d5642ca2eb242e61813478ec0b6b
cobalt-api    | branch: main
cobalt-api    | remote: imputnet/cobalt
cobalt-api    | start time: Thu, 12 Dec 2024 20:49:55 GMT
cobalt-api    | ~~~~~~
cobalt-api    | url: http://localhost:9000/
cobalt-api    | port: 9000
cobalt-api    |

[lostdusty]

any links to help replicate the issue?

[bandicuttt]

any links to help replicate the issue?

https://vm.tiktok.com/ZMkLHUYHq/

None of the links where the tiktok contains a swiper are working

[sertraline]

Can confirm this is an issue even on the main instance. Debugging this is painful because for some reason there is zero debug logging and helpful information on what's happening, so I gave up. But from what I found out the tiktok URLs are working perfectly fine, requests to tiktok complete successfully and the streamInfo gets cached just fine. But accessing the external tunnel will simply give you 0 bytes output.

[sertraline]

These are ffmpeg args that I receive on my instance. Note the undefinedk.

[
  '-loglevel',
  '-8',
  '-headers',
  'user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36\r\n',
  '-i',
  'http://127.0.0.1:9000/itunnel?id=4mYNHNyKIyPHyQm755y-w',
  '-vn',
  '-b:a',
  'undefinedk'
]

https://github.com/imputnet/cobalt/blob/0f6516567191706faedff58395befad0b795d648/api/src/stream/types.js#L254

[ngregrichardson]

Hey, with TikTok possibly becoming unavailable in the US, I'm wondering if this could be looked at more. Attempting to grab some specific videos and it won't work :/ I'm trying to dig through it locally but I'm not too aware of the tunnelling part of the code base

[wukko]

@ngregrichardson hey! what videos aren't downloading? can you make a new issue and fill out the template? also, using https://mullvad.net/ or https://windscribe.com/ will help with going around the region lock (i hope).

[ngregrichardson]

Yeah, hoping VPNs will still get us there 🤞 .

Even on the main instance, try https://www.tiktok.com/@dailydoseofpositivity444/photo/7377016451950972203 with the auto download mode, then click "Download Audio." It downloads a file with 0 bytes. Thanks for the quick response! I am also running locally, so let me know if I can grab any extra info from there.

This is what the streamInfo variable that @sertraline pointed out above is for me, so audioBitrate is undefined.

{
  "exp": 1736697037760,
  "type": "audio",
  "urls": "http://127.0.0.1:9000/itunnel?id=mavHEhkCa5LmaZ4VAQwho",
  "service": "tiktok",
  "filename": "tiktok_dailydoseofpositivity444_7377016451950972203_audio_original.mp3",
  "headers": {
    "cookie": "removing bc idk"
  },
  "metadata": false,
  "audioCopy": false,
  "audioFormat": "mp3",
  "isHLS": false
}

[ngregrichardson]

I forgot to mention, downloading via audio mode it works properly!

[wukko]

try https://www.tiktok.com/@dailydoseofpositivity444/photo/7377016451950972203

i got the picker and both images saved just fine, are you sure it's this link?

[ngregrichardson]

Did the audio file save (and not be 0 bytes) when you click "download audio"?

[wukko]

...nope

[ngregrichardson]

Running locally, when I make a POST request with this body:

{
  "url": "https://www.tiktok.com/@dailydoseofpositivity444/photo/7377016451950972203",
  "downloadMode": "auto"
}

I get this response

{
  "status": "picker",
  "picker": [
    {
      "type": "photo",
      "url": "https://p16-pu-sign-useast8.tiktokcdn-us.com/tos-useast5-i-photomode-tx/4c0576453fd8410eb670e83400aebb34~tplv-photomode-image.jpeg?lk3s=81f88b70&x-expires=1736870400&x-signature=g95uMu2wclbyDm3EVGRuLDsajfQ%3D&shp=81f88b70&shcp=-"
    },
    {
      "type": "photo",
      "url": "https://p19-pu-sign-useast8.tiktokcdn-us.com/tos-useast5-i-photomode-tx/68bf185da0384c8686f7f5b43e20c74e~tplv-photomode-image.jpeg?lk3s=81f88b70&x-expires=1736870400&x-signature=OJBG9s94beXG44EuD7P7LCK2dFA%3D&shp=81f88b70&shcp=-"
    }
  ],
  "audio": "http://localhost:9000/tunnel?id=nZisFkg1AaYElrUreeC5Y&exp=1736698901732&sig=AYmIIZUyMro8OPRwQfzl9_8TxwtLICWjX5YNfmRfzgY&sec=0_hs5VHhR2IYnSGkz9qnTwKs0hCr34Gr5wl2kOlGq4g&iv=Fzcv6hIXcIIHHpDiZEdMlQ",
  "audioFilename": "tiktok_dailydoseofpositivity444_7377016451950972203_audio_original.mp3"
}

When I follow the audio url, I get an mp3 file downloaded with a size of 0 bytes. However, if I make a change here

args.push("-b:a", `${streamInfo.audioBitrate || '8'}k`)

(just as a hard-coded) test, I get a valid mp3 file. Obviously, though, I'm not sure where to pull the bitrate from if audioBitrate doesn't exist

[ngregrichardson]

Actually, this might be a simple fix. Does audioBitrate just need to be passed in here?

https://github.com/imputnet/cobalt/blob/main/api/src/processing/match-action.js#L97-L104

If so, I'm happy to make a PR