Render the ice as long videos and play them as wallpapers

render_wallpaper.py drives headless Firefox frame by frame (four at a time, resuming where it stopped), then ffmpeg. Thirty seconds at 30 fps is exactly one plasma cycle, so frame 900 meets frame 0 and the loop has no seam. plasma-plugin/dev.emil.video is a minimal Plasma 6 video wallpaper: one file per screen, filling the screen, looping. H.264 is encoded Baseline because Qt here decodes through openh264, which rejects High profile and leaves a frozen frame; a new source also has to be played explicitly. The #shot hash learned info=0 to hide the on-screen hint for renders.
2026-10-31 01:22:16 +03:00
parent 3f638a286a
commit 92e8b287a3
7 changed files with 193 additions and 0 deletions
@@ -0,0 +1,58 @@
+import QtQuick
+import QtMultimedia
+import org.kde.plasma.plasmoid
+
+// Plays one video file, filling the screen and looping for ever. Plasma keeps a
+// separate configuration per screen, so every monitor gets its own video.
+WallpaperItem {
+    id: root
+
+    readonly property var activeConfiguration: {
+        if (typeof wallpaper !== "undefined" && wallpaper && wallpaper.configuration)
+            return wallpaper.configuration
+        return typeof configuration !== "undefined" ? configuration : null
+    }
+
+    function option(name, fallback) {
+        if (!activeConfiguration)
+            return fallback
+        const value = activeConfiguration[name]
+        return value === undefined ? fallback : value
+    }
+
+    readonly property string videoPath: String(option("videoPath", ""))
+    // shortcut: keeps decoding behind fullscreen windows too, add window tracking
+    // (as the shader wallpaper plugin does) if the cost ever shows up in a game
+    readonly property bool shouldPlay: videoPath.length > 0 && root.visible
+
+    Rectangle {
+        anchors.fill: parent
+        color: "#03111d"
+    }
+
+    VideoOutput {
+        id: output
+        anchors.fill: parent
+        fillMode: VideoOutput.PreserveAspectCrop
+    }
+
+    MediaPlayer {
+        id: player
+        videoOutput: output
+        source: root.videoPath.length > 0 ? "file://" + root.videoPath : ""
+        loops: MediaPlayer.Infinite
+        playbackRate: Number(root.option("playbackRate", 1.0))
+
+        // Some containers do not restart on their own when they run out of frames.
+        onMediaStatusChanged: {
+            if (mediaStatus === MediaPlayer.EndOfMedia) {
+                position = 0
+                play()
+            }
+        }
+
+        onErrorOccurred: console.warn("video wallpaper:", error, errorString)
+    }
+
+    Component.onCompleted: player.play()
+}