Video stabilization/deshaking: pass 2 of 2, see vidstabdetect for pass 1.

Read a file with transform information for each frame and apply/compensate them. Together with the vidstabdetect filter this can be used to deshake videos. See also 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 --enable-libvidstab.

This filter accepts the following options:

input

path to the file used to read the transforms (default: transforms.trf)

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).

maxshift

maximal number of pixels to translate frames (default: -1 no limit)

maxangle

maximal angle in radians (degree*PI/180) to rotate frames (default: -1 no limit)

crop

How to deal with borders that may be visible due to movement compensation. Available values are:

keep

keep image information from previous frame (default)

black

fill the border black

invert

0

keep transforms normal (default)

1

invert transforms

relative

consider transforms as

0

absolute

1

relative to previous frame (default)

zoom

percentage to zoom (default: 0)

>0

zoom in

<0

zoom out

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.

interpol

type of interpolation

Available values are:

no

no interpolation

linear

linear only horizontal

bilinear

linear in both directions (default)

bicubic

cubic in both directions (slow)

tripod

virtual tripod mode means that the video is stabilized such that the camera stays stationary. Use also tripod option of vidstabdetect.

0

off (default)

1

virtual tripod mode: equivalent to relative=0:smoothing=0