Exam 19: Managing Video Files

Codecs used to capture images come in many forms from camera phones through cameras designed for digital cinema quality. These are most often

The word codec is derived from .

One of the most important things a media container does is arrange and interleave the data so that the audio and video play out synchronically.

In addition to audio and video tracks, QuickTime files also support tracks for

The process of moving media between containers, for example when wanting to use camera files on an editing system, is referred to as

Codecs such as Avid's DNxHD and Apple's Pro Res are both Intraframe

MP3 is a lossy compression and encoding scheme for digital audio, which is replacing AAC (Advanced Audio Coding).

The newest video compression standard, H.265, uses a delivery container called DivX. It can support 8K Ultra High Definition television and resolutions up to 8192 x 4230.

One hint that seems pretty universal is that the file extension for a media file is the container format it is using.

MPEG-3 is the most common digital multimedia format used to stream video and audio at much lower data rates and smaller file sizes than the previous MPEG-1 and MPEG-2 schemes.