http streaming is very slow to start up

I use livestreamer and mpv to watch streaming content on Twitch. The stream is very slow to start and takes at least thirty seconds until the video plays.

I have included the terminal output from livestreamer, but the problem also happens when when opening a http stream with mpv by itself.

$ livestreamer -vp "mpv --cache=1024" twitch.tv/scglive low
[cli][info] Found matching plugin twitch for URL twitch.tv/scglive
[cli][info] Available streams: audio, high, low, medium, mobile (worst), source (best)
[cli][info] Opening stream: low (hls)
[cli][info] Starting player: mpv --cache=1024
Playing: -
[file] Reading from stdin...
[cache] Cache size set to 1024 KiB
Cache fill: 42.97% (450560 bytes)
[cache] Cache is not responding - slow/stuck network connection?
[cache] Cache keeps not responding.
[cache] Cache keeps not responding.
[cache] Cache keeps not responding.
[cache] Cache keeps not responding.
[cache] Cache keeps not responding.
[libav/demuxer] mpegts: max_analyze_duration reached
[libav/demuxer] mpegts: Estimating duration from bitrate, this may be inaccurate
[lavf] LAVF: Program 1
Detected file format: MPEG-TS (MPEG-2 Transport Stream) (libavformat)
File is not seekable, but there's a cache: enabling seeking.
[cache] Cache keeps not responding.
[stream] Video (+) --vid=1 (h264)
[stream] Audio (+) --aid=1 (aac)
Selected video codec: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 [lavc:h264]
Selected audio codec: AAC (Advanced Audio Coding) [lavc:aac]
AO: [pulse] 44100Hz stereo 2ch float
VO: [vdpau] 640x360 => 640x360 420p
[vo/vdpau] Compositing window manager detected. Assuming timing info is inaccurate.
AV: 13:42:01 / 00:00:00 (0%) A-V: -0.000 Cache: 50%

Exiting... (Quit)
[cli][info] Player closed
[cli][info] Stream ended

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libavformat54 6:9.18-0ubuntu0.14.04.1
ProcVersionSignature: Ubuntu 3.13.0-54.91-generic 3.13.11-ckt20
Uname: Linux 3.13.0-54-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Jun 6 00:56:17 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-11-01 (947 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
SourcePackage: libav
UpgradeStatus: Upgraded to trusty on 2014-09-04 (274 days ago)