mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-28 05:50:43 +00:00
doc/filters: put vidstab filters documentation in a sensible order
This commit is contained in:
Stefano Sabatini
parent
cb23de1904
commit
16cecf9c3d
437
doc/filters.texi
437
doc/filters.texi
@ -5306,140 +5306,6 @@ much, but it will increase the amount of blurring needed to cover over
|
||||
the image and will destroy more information than necessary, and extra
|
||||
pixels will slow things down on a large logo.
|
||||
|
||||
@anchor{vidstabtransform}
|
||||
@section vidstabtransform
|
||||
|
||||
Video stabilization/deshaking: pass 2 of 2,
|
||||
see @ref{vidstabdetect} for pass 1.
|
||||
|
||||
Read a file with transform information for each frame and
|
||||
apply/compensate them. Together with the @ref{vidstabdetect}
|
||||
filter this can be used to deshake videos. See also
|
||||
@url{http://public.hronopik.de/vid.stab}. It is important to also use
|
||||
the unsharp filter, see below.
|
||||
|
||||
To enable compilation of this filter you need to configure FFmpeg with
|
||||
@code{--enable-libvidstab}.
|
||||
|
||||
This filter accepts the following options:
|
||||
|
||||
@table @option
|
||||
|
||||
@item input
|
||||
path to the file used to read the transforms (default: @file{transforms.trf})
|
||||
|
||||
@item smoothing
|
||||
number of frames (value*2 + 1) used for lowpass filtering the camera movements
|
||||
(default: 10). For example a number of 10 means that 21 frames are used
|
||||
(10 in the past and 10 in the future) to smoothen the motion in the
|
||||
video. A larger values leads to a smoother video, but limits the
|
||||
acceleration of the camera (pan/tilt movements).
|
||||
|
||||
@item maxshift
|
||||
maximal number of pixels to translate frames (default: -1 no limit)
|
||||
|
||||
@item maxangle
|
||||
maximal angle in radians (degree*PI/180) to rotate frames (default: -1
|
||||
no limit)
|
||||
|
||||
@item crop
|
||||
How to deal with borders that may be visible due to movement
|
||||
compensation. Available values are:
|
||||
|
||||
@table @samp
|
||||
@item keep
|
||||
keep image information from previous frame (default)
|
||||
@item black
|
||||
fill the border black
|
||||
@end table
|
||||
|
||||
@item invert
|
||||
@table @samp
|
||||
@item 0
|
||||
keep transforms normal (default)
|
||||
@item 1
|
||||
invert transforms
|
||||
@end table
|
||||
|
||||
|
||||
@item relative
|
||||
consider transforms as
|
||||
@table @samp
|
||||
@item 0
|
||||
absolute
|
||||
@item 1
|
||||
relative to previous frame (default)
|
||||
@end table
|
||||
|
||||
|
||||
@item zoom
|
||||
percentage to zoom (default: 0)
|
||||
@table @samp
|
||||
@item >0
|
||||
zoom in
|
||||
@item <0
|
||||
zoom out
|
||||
@end table
|
||||
|
||||
@item optzoom
|
||||
if 1 then optimal zoom value is determined (default).
|
||||
Optimal zoom means no (or only little) border should be visible.
|
||||
Note that the value given at zoom is added to the one calculated
|
||||
here.
|
||||
|
||||
@item interpol
|
||||
type of interpolation
|
||||
|
||||
Available values are:
|
||||
@table @samp
|
||||
@item no
|
||||
no interpolation
|
||||
@item linear
|
||||
linear only horizontal
|
||||
@item bilinear
|
||||
linear in both directions (default)
|
||||
@item bicubic
|
||||
cubic in both directions (slow)
|
||||
@end table
|
||||
|
||||
@item tripod
|
||||
virtual tripod mode means that the video is stabilized such that the
|
||||
camera stays stationary. Use also @code{tripod} option of
|
||||
@ref{vidstabdetect}.
|
||||
@table @samp
|
||||
@item 0
|
||||
off (default)
|
||||
@item 1
|
||||
virtual tripod mode: equivalent to @code{relative=0:smoothing=0}
|
||||
@end table
|
||||
|
||||
@end table
|
||||
|
||||
@subsection Examples
|
||||
|
||||
@itemize
|
||||
@item
|
||||
typical call with default default values:
|
||||
(note the unsharp filter which is always recommended)
|
||||
@example
|
||||
ffmpeg -i inp.mpeg -vf vidstabtransform,unsharp=5:5:0.8:3:3:0.4 inp_stabilized.mpeg
|
||||
@end example
|
||||
|
||||
@item
|
||||
zoom in a bit more and load transform data from a given file
|
||||
@example
|
||||
vidstabtransform=zoom=5:input="mytransforms.trf"
|
||||
@end example
|
||||
|
||||
@item
|
||||
smoothen the video even more
|
||||
@example
|
||||
vidstabtransform=smoothing=30
|
||||
@end example
|
||||
|
||||
@end itemize
|
||||
|
||||
|
||||
@section scale
|
||||
|
||||
Scale (resize) the input video, using the libswscale library.
|
||||
@ -5838,92 +5704,6 @@ in [-30,0] will filter edges. Default value is 0.
|
||||
If a chroma option is not explicitly set, the corresponding luma value
|
||||
is set.
|
||||
|
||||
@anchor{vidstabdetect}
|
||||
@section vidstabdetect
|
||||
|
||||
Video stabilization/deshaking: pass 1 of 2, see @ref{vidstabtransform}
|
||||
for pass 2.
|
||||
|
||||
Generates a file with relative transform information translation,
|
||||
rotation about subsequent frames.
|
||||
|
||||
To enable compilation of this filter you need to configure FFmpeg with
|
||||
@code{--enable-libvidstab}.
|
||||
|
||||
This filter accepts the following options:
|
||||
|
||||
@table @option
|
||||
@item result
|
||||
path to the file used to write the transforms (default:@file{transforms.trf})
|
||||
|
||||
@item shakiness
|
||||
how shaky is the video and how quick is the camera? (default: 5)
|
||||
@table @samp
|
||||
@item 1
|
||||
little (fast)
|
||||
@item ...
|
||||
@item 10
|
||||
very strong/quick (slow)
|
||||
@end table
|
||||
|
||||
@item accuracy
|
||||
accuracy of detection process (>=shakiness) (default: 9)
|
||||
@table @samp
|
||||
@item 1
|
||||
low (fast)
|
||||
@item 15
|
||||
high (slow)
|
||||
@end table
|
||||
|
||||
@item stepsize
|
||||
stepsize of search process, region around minimum is scanned with 1 pixel
|
||||
resolution (default: 6)
|
||||
|
||||
@item mincontrast
|
||||
below this contrast a local measurement field is discarded (0-1) (default: 0.3)
|
||||
|
||||
@item tripod
|
||||
virtual tripod mode: @code{tripod=framenum} if framenum>0 otherwise disabled.
|
||||
The motion of the frames is compared to a reference frame (framenum).
|
||||
The idea is to compensate all movements in a more-or-less static scene
|
||||
and keep the camera view absolutely still.
|
||||
(default: 0 (disabled))
|
||||
|
||||
@item show
|
||||
draw nothing (default); 1,2: show fields and transforms in the resulting frames
|
||||
|
||||
@end table
|
||||
|
||||
@subsection Examples
|
||||
|
||||
@itemize
|
||||
@item
|
||||
use default values:
|
||||
@example
|
||||
vidstabdetect
|
||||
@end example
|
||||
|
||||
@item
|
||||
strongly shaky movie and put the results in @code{mytransforms.trf}
|
||||
@example
|
||||
vidstabdetect=shakiness=10:accuracy=15:result="mytransforms.trf"
|
||||
@end example
|
||||
|
||||
@item
|
||||
visualize some internals in the resulting video
|
||||
@example
|
||||
vidstabdetect=show=1
|
||||
@end example
|
||||
|
||||
|
||||
@item
|
||||
Typical call with visualization
|
||||
@example
|
||||
ffmpeg -i input -vf vidstabdetect=shakiness=5:show=1 dummy.avi
|
||||
@end example
|
||||
@end itemize
|
||||
|
||||
|
||||
@section stereo3d
|
||||
|
||||
Convert between different stereoscopic image formats.
|
||||
@ -6438,6 +6218,223 @@ unsharp=7:7:-2:7:7:-2
|
||||
@end example
|
||||
@end itemize
|
||||
|
||||
@anchor{vidstabdetect}
|
||||
@section vidstabdetect
|
||||
|
||||
Video stabilization/deshaking: pass 1 of 2, see @ref{vidstabtransform}
|
||||
for pass 2.
|
||||
|
||||
Generates a file with relative transform information translation,
|
||||
rotation about subsequent frames.
|
||||
|
||||
To enable compilation of this filter you need to configure FFmpeg with
|
||||
@code{--enable-libvidstab}.
|
||||
|
||||
This filter accepts the following options:
|
||||
|
||||
@table @option
|
||||
@item result
|
||||
path to the file used to write the transforms (default:@file{transforms.trf})
|
||||
|
||||
@item shakiness
|
||||
how shaky is the video and how quick is the camera? (default: 5)
|
||||
@table @samp
|
||||
@item 1
|
||||
little (fast)
|
||||
@item ...
|
||||
@item 10
|
||||
very strong/quick (slow)
|
||||
@end table
|
||||
|
||||
@item accuracy
|
||||
accuracy of detection process (>=shakiness) (default: 9)
|
||||
@table @samp
|
||||
@item 1
|
||||
low (fast)
|
||||
@item 15
|
||||
high (slow)
|
||||
@end table
|
||||
|
||||
@item stepsize
|
||||
stepsize of search process, region around minimum is scanned with 1 pixel
|
||||
resolution (default: 6)
|
||||
|
||||
@item mincontrast
|
||||
below this contrast a local measurement field is discarded (0-1) (default: 0.3)
|
||||
|
||||
@item tripod
|
||||
virtual tripod mode: @code{tripod=framenum} if framenum>0 otherwise disabled.
|
||||
The motion of the frames is compared to a reference frame (framenum).
|
||||
The idea is to compensate all movements in a more-or-less static scene
|
||||
and keep the camera view absolutely still.
|
||||
(default: 0 (disabled))
|
||||
|
||||
@item show
|
||||
draw nothing (default); 1,2: show fields and transforms in the resulting frames
|
||||
|
||||
@end table
|
||||
|
||||
@subsection Examples
|
||||
|
||||
@itemize
|
||||
@item
|
||||
use default values:
|
||||
@example
|
||||
vidstabdetect
|
||||
@end example
|
||||
|
||||
@item
|
||||
strongly shaky movie and put the results in @code{mytransforms.trf}
|
||||
@example
|
||||
vidstabdetect=shakiness=10:accuracy=15:result="mytransforms.trf"
|
||||
@end example
|
||||
|
||||
@item
|
||||
visualize some internals in the resulting video
|
||||
@example
|
||||
vidstabdetect=show=1
|
||||
@end example
|
||||
|
||||
@item
|
||||
Typical call with visualization
|
||||
@example
|
||||
ffmpeg -i input -vf vidstabdetect=shakiness=5:show=1 dummy.avi
|
||||
@end example
|
||||
@end itemize
|
||||
|
||||
@anchor{vidstabtransform}
|
||||
@section vidstabtransform
|
||||
|
||||
Video stabilization/deshaking: pass 2 of 2,
|
||||
see @ref{vidstabdetect} for pass 1.
|
||||
|
||||
Read a file with transform information for each frame and
|
||||
apply/compensate them. Together with the @ref{vidstabdetect}
|
||||
filter this can be used to deshake videos. See also
|
||||
@url{http://public.hronopik.de/vid.stab}. It is important to also use
|
||||
the unsharp filter, see below.
|
||||
|
||||
To enable compilation of this filter you need to configure FFmpeg with
|
||||
@code{--enable-libvidstab}.
|
||||
|
||||
This filter accepts the following options:
|
||||
|
||||
@table @option
|
||||
|
||||
@item input
|
||||
path to the file used to read the transforms (default: @file{transforms.trf})
|
||||
|
||||
@item smoothing
|
||||
number of frames (value*2 + 1) used for lowpass filtering the camera movements
|
||||
(default: 10). For example a number of 10 means that 21 frames are used
|
||||
(10 in the past and 10 in the future) to smoothen the motion in the
|
||||
video. A larger values leads to a smoother video, but limits the
|
||||
acceleration of the camera (pan/tilt movements).
|
||||
|
||||
@item maxshift
|
||||
maximal number of pixels to translate frames (default: -1 no limit)
|
||||
|
||||
@item maxangle
|
||||
maximal angle in radians (degree*PI/180) to rotate frames (default: -1
|
||||
no limit)
|
||||
|
||||
@item crop
|
||||
How to deal with borders that may be visible due to movement
|
||||
compensation. Available values are:
|
||||
|
||||
@table @samp
|
||||
@item keep
|
||||
keep image information from previous frame (default)
|
||||
@item black
|
||||
fill the border black
|
||||
@end table
|
||||
|
||||
@item invert
|
||||
@table @samp
|
||||
@item 0
|
||||
keep transforms normal (default)
|
||||
@item 1
|
||||
invert transforms
|
||||
@end table
|
||||
|
||||
|
||||
@item relative
|
||||
consider transforms as
|
||||
@table @samp
|
||||
@item 0
|
||||
absolute
|
||||
@item 1
|
||||
relative to previous frame (default)
|
||||
@end table
|
||||
|
||||
|
||||
@item zoom
|
||||
percentage to zoom (default: 0)
|
||||
@table @samp
|
||||
@item >0
|
||||
zoom in
|
||||
@item <0
|
||||
zoom out
|
||||
@end table
|
||||
|
||||
@item optzoom
|
||||
if 1 then optimal zoom value is determined (default).
|
||||
Optimal zoom means no (or only little) border should be visible.
|
||||
Note that the value given at zoom is added to the one calculated
|
||||
here.
|
||||
|
||||
@item interpol
|
||||
type of interpolation
|
||||
|
||||
Available values are:
|
||||
@table @samp
|
||||
@item no
|
||||
no interpolation
|
||||
@item linear
|
||||
linear only horizontal
|
||||
@item bilinear
|
||||
linear in both directions (default)
|
||||
@item bicubic
|
||||
cubic in both directions (slow)
|
||||
@end table
|
||||
|
||||
@item tripod
|
||||
virtual tripod mode means that the video is stabilized such that the
|
||||
camera stays stationary. Use also @code{tripod} option of
|
||||
@ref{vidstabdetect}.
|
||||
@table @samp
|
||||
@item 0
|
||||
off (default)
|
||||
@item 1
|
||||
virtual tripod mode: equivalent to @code{relative=0:smoothing=0}
|
||||
@end table
|
||||
|
||||
@end table
|
||||
|
||||
@subsection Examples
|
||||
|
||||
@itemize
|
||||
@item
|
||||
typical call with default default values:
|
||||
(note the unsharp filter which is always recommended)
|
||||
@example
|
||||
ffmpeg -i inp.mpeg -vf vidstabtransform,unsharp=5:5:0.8:3:3:0.4 inp_stabilized.mpeg
|
||||
@end example
|
||||
|
||||
@item
|
||||
zoom in a bit more and load transform data from a given file
|
||||
@example
|
||||
vidstabtransform=zoom=5:input="mytransforms.trf"
|
||||
@end example
|
||||
|
||||
@item
|
||||
smoothen the video even more
|
||||
@example
|
||||
vidstabtransform=smoothing=30
|
||||
@end example
|
||||
|
||||
@end itemize
|
||||
|
||||
@section vflip
|
||||
|
||||
Flip the input video vertically.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user