Super I/O
YouTube uses the AAC audio codec for its videos.
DivX itself is a video codec and it uses AAC as audio codec.
If you only have audio but no video, or video but no audio, you are most likely missing a codec required to play the file. You need to find out what codec the video was encoded with, then download and install that codec. You might also check if a newer version of Windows Media Player is available by checking the optional updates section of Windows Update.
It would depend on the format of the audio file. However K-Lite codec pack should cover most of you bases. It is usually the only codec pack I install on a computer.
MPEG-3
MP3
The highest quality free audio codec is known as FLAC. It is lossless and has no compression, so when you listen to the music you are able to hear all the instruments with clarity.
my PC audio is not working
MP4 is a video format with> picture at about 25FPS (frames per second) with audio. iPods, iPhones and iPads read this format also PC's do (personal computer) but you will need a special codec for a PC to read mp4 i suggest : Get itunes on PC or mac or get VLC player.
Audio Codec 3 is a product of Dolby Laboratories.
Codec is a piece of software that translates video and audio data into and from proprietary formats of which MKV is one. It is the codec that enables the computer to interpret data from the proprietary source format.