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YouTube - "unable to extract categories" #3665

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opened 2026-02-21 01:30:45 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-21 01:30:45 -05:00

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Originally created by @Overand on GitHub (Dec 19, 2014).

Link: https://www.youtube.com/watch?v=tu-YAMiS5wA
Version: 2014.12.06.01 (Arch Linux x64)

$ youtube-dl -f bestvideo+bestaudio https://www.youtube.com/watch?v=tu-YAMiS5wA
[youtube] tu-YAMiS5wA: Downloading webpage
[youtube] tu-YAMiS5wA: Extracting video information
WARNING: unable to extract categories; please report this issue on http://yt-dl.org/bug
[youtube] tu-YAMiS5wA: Downloading DASH manifest
[download] Destination: 1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.f243.webm
[download] 100% of 3.56MiB in 00:01
[download] Destination: 1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.f141.m4a
[download] 100% of 3.03MiB in 00:01
[ffmpeg] Merging formats into "1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.webm"
ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

If it's relevant: ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers
built on Nov 2 2014 09:16:45 with gcc 4.9.1 (GCC) 20140903 (prerelease)

Originally created by @Overand on GitHub (Dec 19, 2014). Link: https://www.youtube.com/watch?v=tu-YAMiS5wA Version: 2014.12.06.01 (Arch Linux x64) ``` $ youtube-dl -f bestvideo+bestaudio https://www.youtube.com/watch?v=tu-YAMiS5wA [youtube] tu-YAMiS5wA: Downloading webpage [youtube] tu-YAMiS5wA: Extracting video information WARNING: unable to extract categories; please report this issue on http://yt-dl.org/bug [youtube] tu-YAMiS5wA: Downloading DASH manifest [download] Destination: 1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.f243.webm [download] 100% of 3.56MiB in 00:01 [download] Destination: 1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.f141.m4a [download] 100% of 3.03MiB in 00:01 [ffmpeg] Merging formats into "1981 Nadia Tour gymnastics Paul Hunt comedy uneven bars-tu-YAMiS5wA.webm" ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument ``` If it's relevant: ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers built on Nov 2 2014 09:16:45 with gcc 4.9.1 (GCC) 20140903 (prerelease)

deekerman closed this issue

2026-02-21 01:30:49 -05:00

deekerman commented

2026-02-21 01:30:52 -05:00

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@jaimeMF commented on GitHub (Dec 19, 2014):

Duplicate of #3610, until it's fixed you can merge a mp4 dash video: youtube-dl 'https://www.youtube.com/watch?v=tu-YAMiS5wA' -f 133+bestaudio

For future reports, please post the full output when you run the command with the --verbose option.

@jaimeMF commented on GitHub (Dec 19, 2014): Duplicate of #3610, until it's fixed you can merge a mp4 dash video: `youtube-dl 'https://www.youtube.com/watch?v=tu-YAMiS5wA' -f 133+bestaudio` For future reports, please post the full output when you run the command with the `--verbose` option.

deekerman commented

2026-02-21 01:30:52 -05:00

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@Overand commented on GitHub (Dec 19, 2014):

I'd done this to report the "unable to extract categories" issue (not the stream merge), but it appears that's not a problem with this video on 2014.12.17.1 - whoops! Thanks for the attention, regardless. And that bug looks like a hassle! I'll dig a bit but I doubt I'll be able to submit a meaningfull patch before someone else does.

@Overand commented on GitHub (Dec 19, 2014): I'd done this to report the "unable to extract categories" issue (not the stream merge), but it appears that's not a problem with this video on 2014.12.17.1 - whoops! Thanks for the attention, regardless. And that bug looks like a hassle! I'll dig a bit but I doubt I'll be able to submit a meaningfull patch before someone else does.

deekerman commented

2026-02-21 01:30:53 -05:00

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@jaimeMF commented on GitHub (Dec 19, 2014):

To be honest, when I first read the report I only noticed the unable to extract categories:) (which was fixed with 624dcebff6, some videos don't have any categories listed in their webpage).
If you write a fix, we'll happily review it.

@jaimeMF commented on GitHub (Dec 19, 2014): To be honest, when I first read the report I only noticed the `unable to extract categories`:) (which was fixed with 624dcebff617d3e995d1f0ddb27d604a881b2de2, some videos don't have any categories listed in their webpage). If you write a fix, we'll happily review it.

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