4.2

application on a single computer, or to two or more networked
computers (each running one or more instances of Compressor).
Encoder See codec.
File format The output format used to transcode your source
media file. Also called a transcoding format.
H.264 A video compression standard in widespread use for
recording, distribution, and Internet streaming of high-definition
(HD) video. Also known as MPEG-4 Part 10 or AVC (Advanced
Video Coding).
I-Frame (intra-coded picture) One type of frame used to define
the GOP (Group of Pictures) pattern used during MPEG-2 or
H.264 encoding. A GOP pattern can also include P-frames
(predictive coded picture) and B-frames (bipredicitive coded
picture)
Interlaced video Video to be played on traditional NTSC or PAL
televisions is stored using an interlaced frame rate. Each frame is
actually made up of two half-frames called fields. Each field
contains half the frame lines; the odd (or upper) field contains lines
1, 3, 5, 7, 9 and so on, and the even (or lower) field contains lines
2, 4, 6, 8, 10, and so on. When the video is played back, the TV
displays the fields in an alternating pattern, which creates an
effective illusion of smooth movement. Viewing interlaced video on
a computer screen that displays both fields simultaneously may
reveal a combing effect. Progressive video frame rates store the
video in a series of whole frames instead these two-fields. You
can remove the fields from an interlaced video clip by converting
it to a progressive frame rate.