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Diffstat (limited to 'doc/indevs.texi')
| -rw-r--r-- | doc/indevs.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/indevs.texi b/doc/indevs.texi index aa001cdb63..fa21c099d5 100644 --- a/doc/indevs.texi +++ b/doc/indevs.texi @@ -271,4 +271,23 @@ ffmpeg -f x11grab -follow_mouse centered -r 25 -s cif -i :0.0 out.mpg ffmpeg -f x11grab -follow_mouse 100 -r 25 -s cif -i :0.0 out.mpg @end example +@subsection @var{show_region} AVOption + +The syntax is: +@example +-show_region 1 +@end example + +If @var{show_region} AVOption is specified with @var{1}, then the grabbing +region will be indicated on screen. With this option, it's easy to know what is +being grabbed if only a portion of the screen is grabbed. + +For example: +@example +ffmpeg -f x11grab -show_region 1 -r 25 -s cif -i :0.0+10,20 out.mpg + +# With follow_mouse +ffmpeg -f x11grab -follow_mouse centered -show_region 1 -r 25 -s cif -i :0.0 out.mpg +@end example + @c man end INPUT DEVICES |