vidstabdetect

Analyze video stabilization/deshaking. Perform pass 1 of 2, see vidstabtransform for pass 2.

This filter generates a file with relative translation and rotation transform information about subsequent frames, which is then used by the vidstabtransform filter.

To enable compilation of this filter you need to configure FFmpeg with --enable-libvidstab.

This filter accepts the following options:

result

Set the path to the file used to write the transforms information. Default value is transforms.trf.

shakiness

Set how shaky the video is and how quick the camera is. It accepts an integer in the range 1-10, a value of 1 means little shakiness, a value of 10 means strong shakiness. Default value is 5.

accuracy

Set the accuracy of the detection process. It must be a value in the range 1-15. A value of 1 means low accuracy, a value of 15 means high accuracy. Default value is 15.

stepsize

Set stepsize of the search process. The region around minimum is scanned with 1 pixel resolution. Default value is 6.

mincontrast

Set minimum contrast. Below this value a local measurement field is discarded. Must be a floating point value in the range 0-1. Default value is 0.3.

tripod

Set reference frame number for tripod mode.

If enabled, the motion of the frames is compared to a reference frame in the filtered stream, identified by the specified number. The idea is to compensate all movements in a more-or-less static scene and keep the camera view absolutely still.

If set to 0, it is disabled. The frames are counted starting from 1.

show

Show fields and transforms in the resulting frames. It accepts an integer in the range 0-2. Default value is 0, which disables any visualization.

fileformat

Format for the transforms data file to be written. Acceptable values are

‘ascii’

Human-readable plain text

‘binary’

Binary format, roughly 40% smaller than ascii. (default)

Examples

• Use default values:

  vidstabdetect
  

• Analyze strongly shaky movie and put the results in file mytransforms.trf:

  vidstabdetect=shakiness=10:accuracy=15:result="mytransforms.trf"
  

• Visualize the result of internal transformations in the resulting video:

  vidstabdetect=show=1
  

• Analyze a video with medium shakiness using ffmpeg:

  ffmpeg -i input -vf vidstabdetect=shakiness=5:show=1 dummy.avi