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documentation: extend documentation for ffmpeg -aspect option

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
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Stefano Sabatini 2011-04-09 13:49:49 +02:00 committed by Anton Khirnov
parent 893722ceeb
commit 4bc282322b
1 changed files with 7 additions and 1 deletions
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doc/ffmpeg.texi
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@ -230,7 +230,13 @@ The following abbreviations are recognized:
@end table
@item -aspect @var{aspect}
Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
Set the video display aspect ratio specified by @var{aspect}.
@var{aspect} can be a floating point number string, or a string of the
form @var{num}:@var{den}, where @var{num} and @var{den} are the
numerator and denominator of the aspect ratio. For example "4:3",
"16:9", "1.3333", and "1.7777" are valid argument values.
@item -croptop @var{size}
@item -cropbottom @var{size}
@item -cropleft @var{size}