\input texinfo @c -*- texinfo -*-
-@settitle FFmpeg Documentation
+@settitle ffmpeg Documentation
@titlepage
-@center @titlefont{FFmpeg Documentation}
+@center @titlefont{ffmpeg Documentation}
@end titlepage
@top
@item -r @var{fps}
Set frame rate (Hz value, fraction or abbreviation), (default = 25).
@item -s @var{size}
-Set frame size. The format is @samp{wxh} (ffserver default = 160x128, ffmpeg default = same as source).
+Set frame size. The format is @samp{wxh} (ffserver default = 160x128).
+There is no default for input streams,
+for output streams it is set by default to the size of the source stream.
+If the input file has video streams with different resolutions, the behaviour is undefined.
The following abbreviations are recognized:
@table @samp
@item sqcif
@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}
one for each line, specifying a sequence of options which would be
awkward to specify on the command line. Lines starting with the hash
('#') character are ignored and are used to provide comments. Check
-the @file{ffpresets} directory in the Libav source tree for examples.
+the @file{ffpresets} directory in the FFmpeg source tree for examples.
Preset files are specified with the @code{vpre}, @code{apre},
@code{spre}, and @code{fpre} options. The @code{fpre} option takes the
@ignore
@setfilename ffmpeg
-@settitle FFmpeg video converter
+@settitle ffmpeg video converter
@c man begin SEEALSO
-ffplay(1), ffprobe(1), ffserver(1) and the Libav HTML documentation
+ffplay(1), ffprobe(1), ffserver(1) and the FFmpeg HTML documentation
@c man end
@c man begin AUTHORS
-The Libav developers
+The FFmpeg developers
@c man end
@end ignore