Video does not play sound

Question:

I can see the video but cannot hear any sound.

Answer:

Please check the following.

1) PC is not set on mute.

2) Volume on the timeline is not set to 0%.

3) Other players like Windows Media Player or QuickTime Player can play them with sound.

4) Click [File]->[Options]->[Advance Setting] and see if [Enable for video playback] in [Built in codec] is ticked.

Where all the above falls in your case, you may want to install additional codecs to play sounds.
Go to the following site and install CCCP.
http://loilo.tv/product/22/desc/227#2
(This is just a reference and you need to follow the instruction CCCP provides)