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--no-abort-on-error and --ignore-errors don't work as documented

See original GitHub issue

DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

  • I understand that I will be blocked if I remove or skip any mandatory* field

Checklist

  • I’m reporting a bug unrelated to a specific site
  • I’ve verified that I’m running yt-dlp version 2022.09.01 (update instructions) or later (specify commit)
  • I’ve checked that all provided URLs are playable in a browser with the same IP and same login details
  • I’ve checked that all URLs and arguments with special characters are properly quoted or escaped
  • I’ve searched the bugtracker for similar issues including closed ones. DO NOT post duplicates
  • I’ve read the guidelines for opening an issue

Provide a description that is worded well enough to be understood

Summary

The order of --ignore-errors and --no-abort-on-error is crucially important, but this is a gotcha based upon the documentation.

Weirdly, --abort-on-error == --no-ignore-errors, but --ignore-errors != --no-abort-on-error.

--no-abort-on-error is undocumented in the README.

This is important if one subtitle is missing, it can cause an abort. As opposed to if the thumbnail is missing, and then you just get a warning.

Details

The following options are poorly documented, inconsistent, and can lead to footguns.

From the README:

-i, --ignore-errors                  Continue on download errors, for
                                     example to skip unavailable videos in a
                                     playlist
--abort-on-error                     Abort downloading of further videos (in
                                     the playlist or the command line) if an
                                     error occurs

However, from the code:

    general.add_option(
        '-i', '--ignore-errors',
        action='store_true', dest='ignoreerrors',
        help='Ignore download and postprocessing errors. The download will be considered successful even if the postprocessing fails')
    general.add_option(
        '--no-abort-on-error',
        action='store_const', dest='ignoreerrors', const='only_download',
        help='Continue with next video on download errors; e.g. to skip unavailable videos in a playlist (default)')
    general.add_option(
        '--abort-on-error', '--no-ignore-errors',
        action='store_false', dest='ignoreerrors',
        help='Abort downloading of further videos if an error occurs (Alias: --no-ignore-errors)')

So, basically the behavior is:

  • --ignore-errors => ignoreerrors = True
  • --no-ignore-errors => ignoreerrors = False
  • --abort-on-error => ignoreerrors = False
  • --no-abort-on-error => ignoreerrors = only_download

This is such a footgun because:

  • Why is ‘ignoreerrors’ overloaded to have a ternary value?
  • Why aren’t --abort-on-error and --no-abort-on-error opposites?
  • The order in which you specify the arguments is important

and MOST CRUCIALLY, --no-abort-on-error would lead you to believe that if everything downloads correctly except a single subtitle file, that you should be fine. But instead the whole process aborts.

This has confused other people, but is not the same except bug report: https://github.com/yt-dlp/yt-dlp/issues/3691 https://github.com/yt-dlp/yt-dlp/issues/2875

Suggested remediation

Cheesy Mode

One missing subtitle should be a warning, just like a missing thumbnail is a warning.

Easy Mode

Rewrite the documentation:

  • Add documentation for --no-abort-on-error
  • Explain that the order of --ignore-errors and --no-abort-on-error matters.
  • If --no-abort-on-error comes after --ignore-errors, then an error in one download will abort that individual download. So --ignore-errors should come afterwards if you always want to finish downloading and preprocessing when possible.

Hero Mode

Don’t use ignoreerrors for both playlist and individual video errors.

Rewrite so the following much less confusing options are present, with appropriate semantics in the code. They have the nice benefit that the order doesn’t matter.

    general.add_option(
        '-i', '--ignore-video-errors',
        action='store_true', dest='ignorevideoerrors',
        help='Ignore individual download and postprocessing errors. The download will be considered successful even if the postprocessing fails')
    general.add_option(
        '--no-ignore-video-errors',
        action='store_false', dest='ignorevideoerrors',
        help='Abort this individual download if an error occurs')
    general.add_option(
        '--errors-continue-on-next-video',
        action='store_true', dest='continueonnextvideo',
        help='Continue with next video on download errors; e.g. to skip unavailable videos in a playlist (default)')
    general.add_option(
        '--errors-dont-continue-on-next-video',
        action='store_false', dest='continueonnextvideo',
        help='Don't continue with next video on download errors')

Examples

Here are the commands I will demonstrate:

# thumbnail missing, I get a warning
yt-dlp -vU --write-thumbnail --ignore-errors --no-abort-on-error 'http://www.youtube.com/watch?v=N-NoPwYL9lc'

# some autogenerated sub for und-en missing, I get a crash
yt-dlp -vU --write-auto-subs --sub-langs all --ignore-errors --no-abort-on-error 'http://www.youtube.com/watch?v=N-NoPwYL9lc'

# some autogenerated sub for und-en missing, I get a warning
yt-dlp -vU --write-auto-subs --sub-langs all --no-abort-on-error --ignore-errors 'http://www.youtube.com/watch?v=N-NoPwYL9lc'

Because I can’t paste more than 65536 characters, I will first demonstrate the command the crashes (second one above) and snip some of the highly repetitive lines downloading some of the 100 different auto subtitles.

Provide verbose output that clearly demonstrates the problem

  • Run your yt-dlp command with -vU flag added (yt-dlp -vU <your command line>)
  • Copy the WHOLE output (starting with [debug] Command-line config) and insert it below

Complete Verbose Output

[debug] Command-line config: ['-vU', '--write-auto-subs', '--sub-langs', 'all', '--ignore-errors', '--no-abort-on-error', 'http://www.youtube.com/watch?v=N-NoPwYL9lc']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out UTF-8 (No ANSI), error UTF-8 (No ANSI), screen UTF-8 (No ANSI)
[debug] yt-dlp version 2022.09.01 [5d7c7d6] (pip)
[debug] Python 3.7.10 (CPython 64bit) - Linux-5.10.135-122.509.amzn2.x86_64-x86_64-with-glibc2.2.5 (glibc 2.2.5)
[debug] Checking exe version: ffmpeg -bsfs
[debug] Checking exe version: ffprobe -bsfs
[debug] exe versions: none
[debug] Optional libraries: Cryptodome-3.15.0, brotli-1.0.9, certifi-2022.06.15, mutagen-1.45.1, sqlite3-2.6.0, websockets-10.3
[debug] Proxy map: {}
[debug] Loaded 1670 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: 2022.09.01, Current version: 2022.09.01
yt-dlp is up to date (2022.09.01)
[debug] [youtube] Extracting URL: http://www.youtube.com/watch?v=N-NoPwYL9lc
[youtube] N-NoPwYL9lc: Downloading webpage
[youtube] N-NoPwYL9lc: Downloading android player API JSON
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, vcodec:vp9.2, channels, acodec, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec:vp9.2(10), channels, acodec, lang, proto, filesize, fs_approx, tbr, vbr, abr, asr, vext, aext, hasaud, id
[info] N-NoPwYL9lc: Downloading subtitles: af-en, ak-en, sq-en, am-en, ar-en, hy-en, as-en, ay-en, az-en, bn-en, eu-en, be-en, bho-en, bs-en, bg-en, my-en, ca-en, ceb-en, zh-Hans-en, zh-Hant-en, co-en, hr-en, cs-en, da-en, dv-en, nl-en, en-en, eo-en, et-en, ee-en, fil-en, fi-en, fr-en, gl-en, lg-en, ka-en, de-en, el-en, gn-en, gu-en, ht-en, ha-en, haw-en, iw-en, hi-en, hmn-en, hu-en, is-en, ig-en, id-en, ga-en, it-en, ja-en, jv-en, kn-en, kk-en, km-en, rw-en, ko-en, kri-en, ku-en, ky-en, lo-en, la-en, lv-en, ln-en, lt-en, lb-en, mk-en, mg-en, ms-en, ml-en, mt-en, mi-en, mr-en, mn-en, ne-en, nso-en, no-en, ny-en, or-en, om-en, ps-en, fa-en, pl-en, pt-en, pa-en, qu-en, ro-en, ru-en, sm-en, sa-en, gd-en, sr-en, sn-en, sd-en, si-en, sk-en, sl-en, so-en, st-en, es-en, su-en, sw-en, sv-en, tg-en, ta-en, tt-en, te-en, th-en, ti-en, ts-en, tr-en, tk-en, uk-en, und-en, ur-en, ug-en, uz-en, vi-en, cy-en, fy-en, xh-en, yi-en, yo-en, zu-en, af, ak, sq, am, ar, hy, as, ay, az, bn, eu, be, bho, bs, bg, my, ca, ceb, zh-Hans, zh-Hant, co, hr, cs, da, dv, nl, en-orig, en, eo, et, ee, fil, fi, fr, gl, lg, ka, de, el, gn, gu, ht, ha, haw, iw, hi, hmn, hu, is, ig, id, ga, it, ja, jv, kn, kk, km, rw, ko, kri, ku, ky, lo, la, lv, ln, lt, lb, mk, mg, ms, ml, mt, mi, mr, mn, ne, nso, no, ny, or, om, ps, fa, pl, pt, pa, qu, ro, ru, sm, sa, gd, sr, sn, sd, si, sk, sl, so, st, es, su, sw, sv, tg, ta, tt, te, th, ti, ts, tr, tk, uk, und, ur, ug, uz, vi, cy, fy, xh, yi, yo, zu
[debug] Default format spec: best/bestvideo+bestaudio
[info] N-NoPwYL9lc: Downloading 1 format(s): 22
[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].af-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=af-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].af-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ak-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=ak-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ak-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].sq-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=sq-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].sq-en.vtt

[download] 1.00KiB at  Unknown B/s (00:00)
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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].am-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=am-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].am-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ar-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=ar-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ar-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].hy-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=hy-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].hy-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].as-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=as-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].as-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ay-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=ay-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ay-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].az-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=az-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].az-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bn-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=bn-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bn-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].eu-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=eu-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].eu-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].be-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=be-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].be-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bho-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=bho-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bho-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bs-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=bs-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bs-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bg-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=bg-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].bg-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].my-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=my-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].my-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ca-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=ca-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ca-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ceb-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=ceb-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].ceb-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].zh-Hans-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=zh-Hans-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].zh-Hans-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].zh-Hant-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=zh-Hant-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].zh-Hant-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].co-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=co-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].co-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].hr-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=hr-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].hr-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].cs-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=cs-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].cs-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].da-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=da-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].da-en.vtt

...


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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].uk-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=uk-en&fmt=vtt"
[download] Destination: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].uk-en.vtt

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[info] Writing video subtitles to: Black Hat Data Science - Joseph Turian at Data Gotham (O'Reilly Strata) 2012 [N-NoPwYL9lc].und-en.vtt
[debug] Invoking http downloader on "https://www.youtube.com/api/timedtext?v=N-NoPwYL9lc&caps=asr&xoaf=5&hl=en&ip=0.0.0.0&ipbits=0&expire=1663153000&sparams=ip%2Cipbits%2Cexpire%2Cv%2Ccaps%2Cxoaf&signature=421CD46F2E8313EDD360A5F70BD87477EFE6BF5E.93B218481ECE0FB95E49775109F13C4CB3B21E51&key=yt8&lang=en&tlang=und-en&fmt=vtt"
ERROR: Unable to download video subtitles for 'und-en': HTTP Error 404: Not Found
Traceback (most recent call last):
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 3907, in _write_subtitles
    self.dl(sub_filename, sub_copy, subtitle=True)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 2895, in dl
    return fd.download(name, new_info, subtitle)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/downloader/common.py", line 443, in download
    ret = self.real_download(filename, info_dict)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/downloader/http.py", line 371, in real_download
    establish_connection()
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/downloader/http.py", line 129, in establish_connection
    ctx.data = self.ydl.urlopen(request)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 3656, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib64/python3.7/urllib/request.py", line 531, in open
    response = meth(req, response)
  File "/usr/lib64/python3.7/urllib/request.py", line 641, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python3.7/urllib/request.py", line 569, in error
    return self._call_chain(*args)
  File "/usr/lib64/python3.7/urllib/request.py", line 503, in _call_chain
    result = func(*args)
  File "/usr/lib64/python3.7/urllib/request.py", line 649, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 404: Not Found

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 1459, in wrapper
    return func(self, *args, **kwargs)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 1556, in __extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 1614, in process_ie_result
    ie_result = self.process_video_result(ie_result, download=download)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 2712, in process_video_result
    self.process_info(new_info)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 2954, in process_info
    sub_files = self._write_subtitles(info_dict, temp_filename)
  File "/home/turian/.local/lib/python3.7/site-packages/yt_dlp/YoutubeDL.py", line 3915, in _write_subtitles
    raise DownloadError(msg)
yt_dlp.utils.DownloadError: Unable to download video subtitles for 'und-en': HTTP Error 404: Not Found

Issue Analytics

  • State:open
  • Created a year ago
  • Reactions:1
  • Comments:10 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
turiancommented, Sep 14, 2022

Btw, not really related to this; if your intention of downloading all subs is archiving, I would recommend using --extractor-args youtube:skip=translated_subs. I imagine you don’t really want to archive all auto-translated subs

Thank you for the tip! Yeah, I’m trying to upstream yt-dlp into ArchiveBox to replace youtube-dl, so archival is the goal.

But isn’t --extractor-args youtube:skip=translated_subs the same as “–write-subs --sub-langs all” ? If not what is the difference?

1reaction
pukkandancommented, Sep 14, 2022

Yeah, but youtube claims it has automatic subtitles in the following languages: [info] N-NoPwYL9lc: Downloading subtitles: af-en, ak-en, sq-en, am-en, ar-en, hy-en, as-en, ay-en, az-en, bn-en, eu-en, be-en, bho-en, bs-en, bg-en, my-en, ca-en, ceb-en, zh-Hans-en, zh-Hant-en, co-en, hr-en, cs-en, da-en, dv-en, nl-en, en-en, eo-en, et-en, ee-en, fil-en, fi-en, fr-en, gl-en, lg-en, ka-en, de-en, el-en, gn-en, gu-en, ht-en, ha-en, haw-en, iw-en, hi-en, hmn-en, hu-en, is-en, ig-en, id-en, ga-en, it-en, ja-en, jv-en, kn-en, kk-en, km-en, rw-en, ko-en, kri-en, ku-en, ky-en, lo-en, la-en, lv-en, ln-en, lt-en, lb-en, mk-en, mg-en, ms-en, ml-en, mt-en, mi-en, mr-en, mn-en, ne-en, nso-en, no-en, ny-en, or-en, om-en, ps-en, fa-en, pl-en, pt-en, pa-en, qu-en, ro-en, ru-en, sm-en, sa-en, gd-en, sr-en, sn-en, sd-en, si-en, sk-en, sl-en, so-en, st-en, es-en, su-en, sw-en, sv-en, tg-en, ta-en, tt-en, te-en, th-en, ti-en, ts-en, tr-en, tk-en, uk-en, und-en, ur-en, ug-en, uz-en, vi-en, cy-en, fy-en, xh-en, yi-en, yo-en, zu-en, af, ak, sq, am, ar, hy, as, ay, az, bn, eu, be, bho, bs, bg, my, ca, ceb, zh-Hans, zh-Hant, co, hr, cs, da, dv, nl, en-orig, en, eo, et, ee, fil, fi, fr, gl, lg, ka, de, el, gn, gu, ht, ha, haw, iw, hi, hmn, hu, is, ig, id, ga, it, ja, jv, kn, kk, km, rw, ko, kri, ku, ky, lo, la, lv, ln, lt, lb, mk, mg, ms, ml, mt, mi, mr, mn, ne, nso, no, ny, or, om, ps, fa, pl, pt, pa, qu, ro, ru, sm, sa, gd, sr, sn, sd, si, sk, sl, so, st, es, su, sw, sv, tg, ta, tt, te, th, ti, ts, tr, tk, uk, und, ur, ug, uz, vi, cy, fy, xh, yi, yo, zu

but doesn’t have subtitles for und-en (language: “Undetermined”). I can’t imagine someone calling with --write-auto-subs --sub-langs all and being happy that it breaks because youtube says it has transcriptions for “undetermined” language but doesn’t and then you don’t get that video.

What do you think the behavior should

This sounds like an extractor bug. I will look into it

Btw, not really related to this; if your intention of downloading all subs is archiving, I would recommend using --extractor-args youtube:skip=translated_subs. I imagine you don’t really want to archive all auto-translated subs

Read more comments on GitHub >

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