[YouTube] JSON subtitles not included

[zillionn]

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Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl --skip-download --print-json --list-subs 'https://www.youtube.com/watch?v=RgKAFK5djSk' -v
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--skip-download', '--print-json', '--youtube-skip-dash-manifest', '--list-subs', '--no-playlist', 'https://www.youtube.com/watch?v=RgKAFK5djSk', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.12.09
[debug] Python version 3.5.2 - Darwin-15.6.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2, ffprobe 3.2, rtmpdump 2.3
[debug] Proxy map: {}
...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=BaW_jenozKc
• Single video: https://youtu.be/BaW_jenozKc
• Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

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Description of your issue, suggested solution and other information

Subtitles are not included in the JSON response when using "--list-subs". The only workaround I found was to use "--write-subs" but this way they are also saved in the working dir and I don't want any files to be downloaded (--skip-download).

[dstftw]

No JSON output is supposed to be written at all when --list-subs is used,

[zillionn]

I see. OK, how to get a JSON response with all the media files and the subs?