User Manual

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ALTERNATE FORMATS
For certain purposes, you may prefer to capture one or
more files in alternative formats.
Note: Some TriCaster features do not provide full
functionality for some of the alternate formats. For example,
certain of the formats do not support embedded timecode.
Let’s consider TriCaster’s two MPEG-2 formats first.
MPEG-2
TriCaster’s ‘double-rate’ MPEG-2 format for capture is
comprised entirely of ‘I-frames’, resulting in excellent
image quality. Two variants are provided; the choice
principally affects color sampling applied to captured
clips.
 MPEG-2 Compatibility encoding invokes 4:2:0
color sampling (similar to that of the popular ‘DV’ and ‘HDV’ formats).
 MPEG-2 High Profile encoding raises color sampling to 4:2:2. These files
retain more color information than standard DV/HDV files as well as many
other file formats. The increased color fidelity is especially valuable for
chromakeying purposes. (Please see the notes which follow regarding file
compatibility.)
The 4:2:2 sampling and high fidelity of the MPEG-2 High Profile format make it
especially suitable for chromakeying applications.
Support for High Profile MPEG-2 files by various applications is not universal,
however. It would be prudent to test file compatibility with your favorite third-
party programs before making extensive use of this option.
Note: TriCaster’s High Profile MPEG-2 files meet the “High Profile” MPEG-2 definition
established by the Moving Pictures Expert Group (MPEG). Please see
http://en.wikipedia.org/wiki/Mpeg2 for more detailed information on High Profile MPEG-2
encoding.
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