youtube-dl: youtube-dl downloading extremely slow (< 200KiB/s)

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• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like this: [x])
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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.01.14. If it’s not, read this FAQ entry and update. Issues with outdated version will be rejected.

• [x ] I’ve verified and I assure that I’m running youtube-dl 2018.01.14

Before submitting an issue make sure you have:

• [x ] At least skimmed through the README, most notably the FAQ and BUGS sections
• [x ] Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• [x ] Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple —) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

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

root@srvr:/var/www/html# youtube-dl -v --format=140 -o songs/song11.m4a 'https://www.youtube.com/watch?v=4-BtZWGaPNY' 
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'--format=140', u'-o', u'songs/song11.m4a', u'https://www.youtube.com/watch?v=4-BtZWGaPNY']
WARNING: Assuming --restrict-filenames since file system encoding cannot encode all characters. Set the LC_ALL environment variable to fix this.
[debug] Encodings: locale ANSI_X3.4-1968, fs ANSI_X3.4-1968, out ANSI_X3.4-1968, pref ANSI_X3.4-1968
[debug] youtube-dl version 2018.01.14
[debug] Python version 2.7.6 (CPython) - Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] exe versions: avconv 9.20-6, avprobe 9.20-6, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] 4-BtZWGaPNY: Downloading webpage
[youtube] 4-BtZWGaPNY: Downloading video info webpage
[youtube] 4-BtZWGaPNY: Extracting video information
[youtube] {22} signature length 42.45, html5 player vflLCGcm0
[youtube] {43} signature length 42.45, html5 player vflLCGcm0
[youtube] {18} signature length 42.45, html5 player vflLCGcm0
[youtube] {36} signature length 42.45, html5 player vflLCGcm0
[youtube] {17} signature length 42.45, html5 player vflLCGcm0
[youtube] {136} signature length 42.45, html5 player vflLCGcm0
[youtube] {247} signature length 42.45, html5 player vflLCGcm0
[youtube] {298} signature length 42.45, html5 player vflLCGcm0
[youtube] {302} signature length 42.45, html5 player vflLCGcm0
[youtube] {135} signature length 42.45, html5 player vflLCGcm0
[youtube] {244} signature length 42.45, html5 player vflLCGcm0
[youtube] {134} signature length 42.45, html5 player vflLCGcm0
[youtube] {243} signature length 42.45, html5 player vflLCGcm0
[youtube] {133} signature length 42.45, html5 player vflLCGcm0
[youtube] {242} signature length 42.45, html5 player vflLCGcm0
[youtube] {160} signature length 42.45, html5 player vflLCGcm0
[youtube] {278} signature length 42.45, html5 player vflLCGcm0
[youtube] {140} signature length 42.45, html5 player vflLCGcm0
[youtube] {171} signature length 42.45, html5 player vflLCGcm0
[youtube] {249} signature length 42.45, html5 player vflLCGcm0
[youtube] {250} signature length 42.45, html5 player vflLCGcm0
[youtube] {251} signature length 42.45, html5 player vflLCGcm0
[debug] Invoking downloader on u'https://r5---sn-5hne6n7z.googlevideo.com/videoplayback?source=youtube&clen=2542652&ms=au&mt=1516109320&mv=m&id=o-AEMDEBbzlzj4SrO-hBEBcXGnvbTDkuN44VftfSf_imxk&dur=160.031&gir=yes&mime=audio%2Fmp4&mn=sn-5hne6n7z&ip=[MY_IP]&ei=iP5dWuSuDNvk1gKozqbIAg&requiressl=yes&itag=140&keepalive=yes&ipbits=0&initcwndbps=243750&pl=25&key=yt6&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&lmt=1507243774824422&expire=1516131048&mm=31&signature=80F2ECB5005CE0B0B493625E5E11F0B2DAC2C9F6.DF4FCAF5F8D7F3B5EE37A90EF6772D331317930F&ratebypass=yes'
[download] Destination: songs/song11.m4a
[download] 100% of 2.42MiB in 00:35
[ffmpeg] Correcting container in "songs/song11.m4a"
WARNING: Your copy of avconv is outdated, update avconv to version 10-0 or newer if you encounter any errors.
[debug] ffmpeg command line: avconv -y -i 'file:songs/song11.m4a' -c copy -f mp4 'file:songs/song11.temp.m4a
<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=4-BtZWGaPNY

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

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Description of your issue, suggested solution and other information

It was working fine until yesterday, but today the speed is ridiculously slow. I tried installing youtube-dl both locally and on my production server, but the speed remains painfully slow, hovering just above 100KiB/s.

I am running the newest version of youtube-dl, and I’ve pasted the log above. I don’t know how to further debug this issue. Please help.

EDIT: running the following command:

curl -s https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python -

gives me results:

Testing download speed… Download: 81.56 Mbit/s

and everything besides youtube-dl seems to be working within expected speed parameters.

EDIT2: sometimes running youtube-dl command simply produces output ‘Segmentation fault’

EDIT3: adding --force-ipv4 did not change anything