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Document that WebM videos don't support the alpha channel

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(cherry picked from commit 1a616726cf)
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Hugo Locurcio 2020-11-22 17:43:07 +01:00 committed by Rémi Verschelde
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modules/webm/doc_classes/VideoStreamWebm.xml
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@ -5,6 +5,7 @@
</brief_description>
<description>
[VideoStream] resource handling the [url=https://www.webmproject.org/]WebM[/url] video format with [code].webm[/code] extension. Both the VP8 and VP9 codecs are supported. The VP8 and VP9 codecs are more efficient than [VideoStreamTheora], but they require more CPU resources to decode (especially VP9). Both the VP8 and VP9 codecs are decoded on the CPU.
[b]Note:[/b] Alpha channel (also known as transparency) is not supported. The video will always appear to have a black background, even if it originally contains an alpha channel.
[b]Note:[/b] There are known bugs and performance issues with WebM video playback in Godot. If you run into problems, try using the Ogg Theora format instead: [VideoStreamTheora]
</description>
<tutorials>