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| -rw-r--r-- | doc/ffmpeg.texi | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 47ed58bb37..af9d6ba87a 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -232,7 +232,13 @@ 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} |