[Bf-docboard-svn] bf-manual: [7143] trunk/blender_docs/manual/files/media/video_formats.rst: Document alpha capability of WebM/VP9

[Sybren A. Stüvel]

Revision: 7143
          https://developer.blender.org/rBM7143
Author:   sybren
Date:     2020-09-29 17:42:08 +0200 (Tue, 29 Sep 2020)
Log Message:
-----------
Document alpha capability of WebM/VP9

Blender can export videos with an alpha channel to WebM/VP9, but not
import.

Manifest Task: https://developer.blender.org/T80769

Modified Paths:
--------------
    trunk/blender_docs/manual/files/media/video_formats.rst

Modified: trunk/blender_docs/manual/files/media/video_formats.rst
===================================================================
--- trunk/blender_docs/manual/files/media/video_formats.rst	2020-09-29 05:33:14 UTC (rev 7142)
+++ trunk/blender_docs/manual/files/media/video_formats.rst	2020-09-29 15:42:08 UTC (rev 7143)
@@ -32,6 +32,7 @@
    - `PNG <https://en.wikipedia.org/wiki/Portable_Network_Graphics>`__
    - Quicktime
    - PNG TIFF Pixlet is not lossless, and may be only available on macOS.
+   - WebM/VP9 (although Blender will not import the alpha channel due to a `limitation of FFmpeg <https://trac.ffmpeg.org/ticket/8344>`__.
 
 Blender offers three ways to export videos, in the *File Format* selector of the *Output* properties: