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%MPGWRITE Write an MPEG file.
% MPGWRITE(M, map, 'filename', options) Encodes M in MPEG
% format using the specified colormap and writes the result to the
% specified file. The options argument is an optional vector of
% 8 or fewer options where each value has the following meaning:
% 1. REPEAT:
% An integer number of times to repeat the movie
% (default is 1).
% 2. P-SEARCH ALGORITHM:
% 0 = logarithmic (fastest, default value)
% 1 = subsample
% 2 = exhaustive (better, but slow)
% 3. B-SEARCH ALGORITHM:
% 0 = simple (fastest)
% 1 = cross2 (slightly slower, default value)
% 2 = exhaustive (very slow)
% 4. REFERENCE FRAME:
% 0 = original (faster, default)
% 1 = decoded (slower, but results in better quality)
% 5. RANGE IN PIXELS:
% An integer search radius. Default is 10.
% 6. I-FRAME Q-SCALE:
% An integer between 1 and 31. Default is 8.
% 7. P-FRAME Q-SCALE:
% An integer between 1 and 31. Default is 10.
% 8. B-FRAME Q-SCALE:
% An integer between 1 and 31. Default is 25.
%
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