4.2

Preview area In Compressor, the area where you can play your
source file and preview your output file. After you apply effects or
change the properties of the setting that will transcode your
source file, you can compare the “before” and “after” versions by
clicking the Comparison button (under the timeline). The screen is
divided by a vertical white line, with the source file shown on the
left and the preview of the transcoded file shown on the right.
Resolution Image resolution refers to the frame size of the video.
Image resolution is expressed in terms of the width and height (the
frame size) of the image in pixels. Higher-resolution images
contain more detail but also create larger files that take longer to
download. Your electronic devices (computer, iPhone, iPad, iPod,
and so on) also have screen resolution. Resolution is expressed in
terms of the width and height of the image in pixels (for example,
640 x 360 pixels).
When you add a setting to a source media file, Compressor
determines appropriate resolution sizes you can use, based on
the image sizes used in the movie and on the setting that you’re
using to output the file.
Sample rate The number of times per second that music
waveforms (samples) are captured digitally. The higher the sample
rate, the higher the quality and the larger the file size.
Sample size The number of bits in each audio sample;
determines the potential dynamic range of the sound.
Setting In Compressor, a group of properties that are used to
transcode a source media file. Each setting contains the following
properties (which you can modify in the Inspector pane):
A transcoding format that converts your source media file.