On older Ubuntu 14.04 LTS I had no problems.
I have tried to find a fix for this myself but so far I have only understood it may have something to do with GStreamer 1.0 used instead of an older GStreamer 0.10. But what I could not find out whether I should:
1) Just install old GStreamer 0.10 along with GStreamer 1.0?
2) Replace GStreamer 1.0 with older GStreamer 0.10?
3) Wait and hope that GStreamer developers get this fixed?
I personally think the best solution would be to get new plugins fixed as soon as possible. But then the problem is how to get the attention of plugin developers, get this issue reported and get fixed?
Best answer by na0341
Hello Sami Serola :)
easy: open an mp3 - file with Rhytmbox - if your system missing any codecs, Rhytmbox ask's you to install them
perfect and fast: -I think that's the best and stablest way
https://askubuntu.com/questions/171026/how-to-install-all-existing-media-codecs (you don't have to install mplayer2 - for you, only the VLC - Packages needed! And by the way, VLC is a very nice media Player for just everything!)
manual: install it manually by running the following command in a shell (this will install (M)ANY codecs who aren't free software - codecs):
sudo apt-get install libxvidcore4 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly gstreamer1.0-plugins-bad gstreamer1.0-alsa gstreamer1.0-fluendo-mp3 gstreamer1.0-libav
To install all codecs, run the following command (!146MB!):
sudo apt-get install ubuntu-restricted-extras
Browsertest html5 mp3 playback
PS: soundcloud worked in my firefox developer edition after execute the "easy" way I listed - only on some pages (like my own profile) it imediately starts the player and skips from one track to another... ..but I think this is a local problem with my browser
if you've further questions, please ask detailed! | sry for typng errors
have a nice night