[gtk/wip/otte/build: 1/2] build: Set proper defaults for media backends

[Benjamin Otte <otte src gnome org>]

commit 35352db49dc593df484f39d6240f0707993c7243
Author: Benjamin Otte <otte redhat com>
Date:   Thu Apr 1 17:59:18 2021 +0200

    build: Set proper defaults for media backends
    
    GTK supports webm playback, which means a backend should always be
    compiled.
    
    The ffmpeg backend however is incomplete (no audio) and as such, we
    don't want people to end up with it accidentally.

 .gitlab-ci.yml    | 1 +
 meson_options.txt | 8 +++++---
 2 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a41fae5b7f..1c456ccff8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -162,6 +162,7 @@ macos:
     - export MESON_FORCE_BACKTRACE=1
   script:
     - meson -Dx11-backend=false
+            -Dmedia-gstreamer=disabled
             -Dintrospection=disabled
             -Dcpp_std=c++11
             -Dpixman:tests=disabled
diff --git a/meson_options.txt b/meson_options.txt
index 16a1cbd9fe..b1c7632795 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -26,15 +26,17 @@ option('macos-backend',
        description : 'Enable the macOS gdk backend (only when building on macOS)')
 
 # Media backends
+# For distros: GTK guarantees support for WebM video (VP8 and VP9), so a supported build
+# should provide that.
 
 option('media-ffmpeg',
        type: 'feature',
-       value: 'auto',
-       description : 'Build the ffmpeg media backend')
+       value: 'disabled',
+       description : 'Build the experimental ffmpeg media backend')
 
 option('media-gstreamer',
        type: 'feature',
-       value: 'auto',
+       value: 'enabled',
        description : 'Build the gstreamer media backend')
 
 # Print backends