output template playlist_index issue

[iMrQuake]

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hi
i have a youtube-dl bug regarding output template naming using playlist_id
if youtube playlist contains for instance 20 videos
if you ask download 9-10 videos, in output template using playlist_index, I got 1 for video 9 and 2 for video 10
i want youtube-dm to keep the original index, not the index in the sub set of selected video to download

Youtube-dl nom$ youtube-dl --ignore-config --simulate --playlist-items 3-4 -o "%(playlist_index)s.%(ext)s" "https://www.youtube.com/playlist?list=PLhCH_nPE4JTrTYw0SCfuv94RPWMMmml0F" --verbose --get-filename
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--ignore-config', u'--simulate', u'--playlist-items', u'3-4', u'-o', u'%(playlist_index)s.%(ext)s', u'https://www.youtube.com/playlist?list=PLhCH_nPE4JTrTYw0SCfuv94RPWMMmml0F', u'--verbose', u'--get-filename']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.11.27
[debug] Python version 2.7.10 - Darwin-15.6.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2.1, ffprobe 3.2.1
[debug] Proxy map: {}
1.mp4
2.mp4

Expected filename:
3.mp4
4.mp4

[many thanks

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[yan12125]

Thanks for the report. It's a known bug (#10591) and there's a possible fix at #10622