Program failed to download auto-subtitle

[xubuntu4iran]

youtube-dl -v -f 18 --write-auto-sub --sub-format smi http://www.youtube.com/watch?v=g5kVmRQUZyQ
[debug] System config: []
[debug] User config: ['--proxy', 'http://localhost:8118']
[debug] Command-line args: ['-v', '-f', '18', '--write-auto-sub', '--sub-format', 'smi', 'http://www.youtube.com/watch?v=g5kVmRQUZyQ']
[debug] Encodings: locale 'UTF-8', fs 'UTF-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2014.01.08
[debug] Python version 2.7.6 - Linux-3.9.6-i686-with-debian-7.0
[debug] Proxy map: {u'http': 'http://localhost:8118', u'https': 'http://localhost:8118'}
[youtube] Setting language
[youtube] g5kVmRQUZyQ: Downloading webpage
[youtube] g5kVmRQUZyQ: Downloading video info webpage
[youtube] g5kVmRQUZyQ: Extracting video information
[youtube] g5kVmRQUZyQ: Looking for automatic captions
[youtube] g5kVmRQUZyQ: Downloading XML
WARNING: unable to download video subtitles for en: Unable to download webpage: HTTP Error 404: Not Found; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
[download] Resuming download at byte 350441
[download] Destination: OpenSUSE 13.1 Review - Fast & Stable-g5kVmRQUZyQ.mp4
[download]   2.3% of 16.01MiB at 43.93KiB/s ETA 06:04^C
ERROR: Interrupted by user

I think this video has an auto-subtitle for en lang, why this format (smi) not included in youtube-dl -h output

[jaimeMF]

It's not included because Youtubue doesn't seem to provide the subtitles in that format (srt, vtt and sbc are supported), we are not converting them.