mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-06 09:29:42 +00:00
22 lines
921 B
Text
22 lines
921 B
Text
|
Videobox
|
||
|
|
--------
|
||
|
|
|
||
|
|
This plugin crops or enlarges the image. It takes 4 values as input, a
|
||
|
|
top, bottom, left and right offset. Positive values will crop that much
|
||
|
|
pixels from the respective border of the image, negative values will add
|
||
|
|
that much pixels. When pixels are added, you can specify their color.
|
||
|
|
Some predefined colors are usable with an enum property.
|
||
|
|
|
||
|
|
The plugin is alpha channel aware and will try to negotiate with a format
|
||
|
|
that supports alpha channels first. When alpha channel is active two
|
||
|
|
other properties, alpha and border_alpha can be used to set the alpha
|
||
|
|
values of the inner picture and the border respectively. an alpha value of
|
||
|
|
0.0 means total transparency, 1.0 is opaque.
|
||
|
|
|
||
|
|
The videobox plugin has many uses such as doing a mosaic of pictures,
|
||
|
|
letterboxing video, cutting out pieces of video, picture in picture, etc..
|
||
|
|
|
||
|
|
TODO
|
||
|
|
|
||
|
|
- add enum to specify common aspect ratios/sizes and add borders/crop
|