frei0r - FFmpeg 2.1.8 / Filters / Video

Apply a frei0r effect to the input video.

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

This filter accepts the following options:

filter_name: The name to the frei0r effect to load. If the environment variable FREI0R_PATH is defined, the frei0r effect is searched in each one of the directories specified by the colon separated list in FREIOR_PATH, otherwise in the standard frei0r paths, which are 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 (whose values are specified with "y" and "n"), a double, a color (specified by the syntax R/G/B, (R, G, and B being float numbers from 0.0 to 1.0) or by a color description specified in the "Color" section in the ffmpeg-utils manual), a position (specified by the syntax X/Y, X and Y being float numbers) and a string.

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

Examples

Apply the distort0r effect, set the first two double parameters:
```
frei0r=filter_name=distort0r:filter_params=0.5|0.01
```

Apply the colordistance effect, take a color as first parameter:

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

Apply the perspective effect, specify 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