no sound

Hi , after installing linux no sound in flash video, no sound mp4
but i can hear mp3. Could you help if you have information? :’(

Have you done the multi-media
Multi-media and Restricted Format Installation Guide

Sound troubleshooter
SDB:Audio troubleshooting - openSUSE

i did everything, thank you so much it works

You are welcome

Download alsamixer through yast
In terminal write

> alsamixer 

Encrease all sound bars.
That’s all.
Αn alternative and easier solution to your problem

alsamixer should already be installed by default and is provided by the alsa-utils package