What are mp4's please? I have heard of mp3's and wav. files. What is the difference between these and mp4's pl

Answer 1

http://en.wikipedia.org/wiki/Mp4

Answer 2

"MPEG-4 Part 14, formally, ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most-commonly used to store digital audio and digital video streams, especially those defined by MPEG, but also can be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often referred to simply as MP4. M4A stands for MPEG 4 Audio, and it is a popular file extension used to represent audio files. Most people are familiar with MP3 and how it shrinks down the file size of songs and other audio files. M4A and MP4 do the same thing as MP3 does, but even better. Quality is better and file sizes are usually smaller than MP3 files. But unlike MP3, no licenses or payments are required to be able to stream or distribute content in M4A format (unlike MP3 which requires you to pay royalties on content you distribute in MP3 format). This fact alone, is more than enough reason (due to the extreme cost savings) to use M4A files instead of MP3 files. In addition, M4A files tend to sound much better than MP3 files encoded at the same bitrate."

From Wikipedia.

Answer 3

MP4 is an audio file encoded in the MPEG-4 format just as MP3 is encoded in the MPEG-3 format.

http://www.mpeg.org

Answer 4

Actually the same type of thing... Audio and video. Supposedly better sound in a smaller file. thats about all I know..