Documentation:Modules/alphamask: Difference between revisions
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{{Module|name=alphamask|type=Video filter|first_version=0.9.0|description= | {{Mosaic framework}} | ||
{{Module|name=alphamask|type=Video filter|first_version=0.9.0|description=Change the video's alpha channel|sc=alphamask|sc2=mask}} | |||
This filter can be used in the mosaic framework to set a video's alpha channel (or transparency) based on a [[PNG]] image's alpha channel. You can thus blend only parts of the mosaic substream on the background. | |||
__TOC__ | |||
== Options == | == Options == | ||
{{Option | {{Option | ||
|name=alphamask-mask | |name=alphamask-mask | ||
|value=string | |value=string | ||
|default= | |default=NULL | ||
|description=PNG file to use as a mask. The alpha channel only will be used to build the mask. This image needs to have the same size as the video it will be used with. | |description=[[PNG]] file to use as a mask. The alpha channel only will be used to build the mask. This image needs to have the same size as the video it will be used with. | ||
}} | }} | ||
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control channel0 play | control channel0 play | ||
The files used are available on | The files used are available on [https://web.archive.org/web/20121015070412/https://people.videolan.org/~dionoea/mosaic/ people.videolan.org/~dionoea/mosaic (archived)] if you want to test. (This will blend the redefined nintendo video in a cone like region) | ||
{{ | == Source code == | ||
* {{VLCSourceFile|modules/video_filter/alphamask.c}} | |||
{{Documentation footer}} | |||
Latest revision as of 08:05, 31 May 2019
| Mosaic framework (How-To) |
| Modules: mosaic (mosaic-bridge • bridge-in • bridge-out) • alphamask • bluescreen |
| Module: alphamask | |
|---|---|
| Type | Video filter |
| First VLC version | 0.9.0 |
| Last VLC version | - |
| Operating system(s) | all |
| Description | Change the video's alpha channel |
| Shortcut(s) | alphamask, mask
|
This filter can be used in the mosaic framework to set a video's alpha channel (or transparency) based on a PNG image's alpha channel. You can thus blend only parts of the mosaic substream on the background.
Options
- alphamask-mask <string> : PNG file to use as a mask. The alpha channel only will be used to build the mask. This image needs to have the same size as the video it will be used with. default value: NULL
Example
% vlc -I telnet --color -vvv --vlm-conf mosaic.vlm --mosaic-keep-picture \ --fake-file ~/images/mire.jpg --fake-width 360 --fake-height 270 \ --no-audio --sub-filter mosaic
And the vlm config:
new channel0 broadcast enabled
setup channel0 input redefined-nintendo.mpg
setup channel0 output #duplicate{dst=mosaic-bridge{height=270,width=360,chroma=YUVA,vfilter=alphamask{mask=cone_360x270.png}},select=video}
new background broadcast enabled
setup background input fake:
control background play
control channel0 play
The files used are available on people.videolan.org/~dionoea/mosaic (archived) if you want to test. (This will blend the redefined nintendo video in a cone like region)
Source code
This page is part of official VLC media player Documentation (User Guide • Streaming HowTo • Hacker Guide • Modules)
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