Computer Concepts Eagle M2, Руководство пользователя

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7. Acorn movie compression routines & RCompress
Output quality
This specifies the minimum permitted compression. The default
values are those recommended by Acorn. You can specify the
output quality in three different ways:
Data rate/latency
This lets you set a quality suitable for a particular storage
device. Data rate is the sustained data transfer rate. Latency
is the typically the time required to access the data.
Quality
This specifies a minimum quality level. (Differ uses a higher
quality if possible.) 0 is the highest (little quality reduction).
Values above 15 give a noticeably poorer quality.
Frame size
This lets you specify the maximum number of bytes used to
store a frame.
Compressing a movie
Drop the uncompressed movie file on the RCompress icon on the
icon bar. This opens a dialogue box:
This displays information about the movie. (It is sometimes useful
to drop a movie onto RCompress just to display this information.) You
can edit the Title, Date, and Author fields. The other fields are
information only.
The Video and Audio fields show the technical details:
size (160x128 pixels),
data type (16bit RGB),
number of frames (25),
frame rate (12.5fps),
total play time (2 seconds),
audio data format (8bit linear signed),
mono/stereo, and
playback rate (11kHz).
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