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Diffstat (limited to 'doc/avconv.texi')
| -rw-r--r-- | doc/avconv.texi | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/doc/avconv.texi b/doc/avconv.texi index d6e409612e..693c45e429 100644 --- a/doc/avconv.texi +++ b/doc/avconv.texi @@ -260,8 +260,18 @@ Set the number of video frames to record. This is an alias for @code{-frames:v}. Set frame rate (Hz value, fraction or abbreviation), (default = 25). For output streams implies @code{-vsync cfr}. @item -s[:@var{stream_specifier}] @var{size} (@emph{input/output,per-stream}) -Set frame size. The format is @samp{wxh} (default - same as source). -The following abbreviations are recognized: +Set frame size. + +As an input option, this is a shortcut for the @option{video_size} private +option, recognized by some demuxers for which the frame size is either not +stored in the file or is configurable -- e.g. raw video or video grabbers. + +As an output option, this inserts the @code{scale} video filter to the +@emph{end} of the corresponding filtergraph. Please use the @code{scale} filter +directly to insert it at the beginning or some other place. + +The format is @samp{wxh} (default - same as source). The following +abbreviations are recognized: @table @samp @item sqcif 128x96 |