frei0r

Apply a frei0r effect to the input video.

To enable the compilation of this filter, you need to install the frei0r header and configure FFmpeg with --enable-frei0r.

It accepts the following parameters:

'filter_name'

The name of the frei0r effect to load. If the environment variable FREI0R_PATH is defined, the frei0r effect is searched for in each of the directories specified by the colon-separated list in FREI0R_PATH. Otherwise, the standard frei0r paths are searched, in this order: 'HOME/.frei0r-1/lib/', '/usr/local/lib/frei0r-1/', '/usr/lib/frei0r-1/'.

'filter_params'

A '|'-separated list of parameters to pass to the frei0r effect.

A frei0r effect parameter can be a boolean (its value is either "y" or "n"), a double, a color (specified as R/G/B, where R, G, and B are floating point numbers between 0.0 and 1.0, inclusive) or a color description as specified in the (ffmpeg-utils)"Color" section in the ffmpeg-utils manual, a position (specified as X/Y, where X and Y are floating point numbers) and/or a string.

The number and types of parameters depend on the loaded effect. If an effect parameter is not specified, the default value is set.

Command line examples

• Apply the distort0r effect, setting the first two double parameters:

  frei0r=filter_name=distort0r:filter_params=0.5|0.01
  

• Apply the colordistance effect, taking a color as the first parameter:

  frei0r=colordistance:0.2/0.3/0.4
  frei0r=colordistance:violet
  frei0r=colordistance:0x112233
  

• Apply the perspective effect, specifying the top left and top right image positions:

  frei0r=perspective:0.2/0.2|0.8/0.2
  

For more information, see http://frei0r.dyne.org