virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity

doc/indevs: add some XCB info to x11grab

Browse Source 
Signed-off-by: Lou Logan <lou@lrcd.com>
This commit is contained in:
Lou Logan 2015-01-28 09:35:31 -09:00
parent ccccfb59b1
commit 961f2e3aac
1 changed files with 17 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
doc/indevs.texi
View File

@ -975,8 +975,12 @@ other filename will be interpreted as device number 0.
X11 video input device.
Depends on X11, Xext, and Xfixes. Requires the configure option
@code{--enable-x11grab}.
To enable this input device during configuration you need libxcb
installed on your system. It will be automatically detected during
configuration.
Alternatively, the configure option @option{--enable-x11grab} exists
for legacy Xlib users.
This device allows one to capture a region of an X11 display.
@ -994,10 +998,12 @@ omitted, and defaults to "localhost". The environment variable
area with respect to the top-left border of the X11 screen. They
default to 0.
Check the X11 documentation (e.g. man X) for more detailed information.
Check the X11 documentation (e.g. @command{man X}) for more detailed
information.
Use the @command{dpyinfo} program for getting basic information about the
properties of your X11 display (e.g. grep for "name" or "dimensions").
Use the @command{xdpyinfo} program for getting basic information about
the properties of your X11 display (e.g. grep for "name" or
"dimensions").
For example to grab from @file{:0.0} using @command{ffmpeg}:
@example
@ -1046,6 +1052,10 @@ If @var{show_region} is specified with @code{1}, then the grabbing
region will be indicated on screen. With this option, it is easy to
know what is being grabbed if only a portion of the screen is grabbed.
@item region_border
Set the region border thickness if @option{-show_region 1} is used.
Range is 1 to 128 and default is 3 (XCB-based x11grab only).
For example:
@example
ffmpeg -f x11grab -show_region 1 -framerate 25 -video_size cif -i :0.0+10,20 out.mpg
@ -1061,7 +1071,8 @@ Set the video frame size. Default value is @code{vga}.
@item use_shm
Use the MIT-SHM extension for shared memory. Default value is @code{1}.
It may be necessary to disable it for remote displays.
It may be necessary to disable it for remote displays (legacy x11grab
only).
@end table
@section decklink