Launching webcamoid from terminal it gives this output before exiting $ webcamoid WARNING: Cannot find style "Universal" - fallback: "/usr/lib64/qt5/qml/QtQuick/Controls/Styles/Desktop" qrc:/Webcamoid/share/qml/RecordConfig.qml:82:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/RecordConfig.qml:74:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/RecordConfig.qml:126:5: QML Label: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead. qrc:/Webcamoid/share/qml/EffectConfig.qml:58:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/EffectConfig.qml:53:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/AudioInfo.qml:184:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/MediaConfig.qml:46:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/MediaConfig.qml:40:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/OutputConfig.qml:35:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/VirtualCamera/share/qml/main.qml:47:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/RecordBar.qml:87:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/EffectBar.qml:93:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/AudioConfig.qml:78:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/MediaBar.qml:53:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/main.qml:127:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/main.qml:122:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/main.qml:117:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/main.qml:102:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qrc:/Webcamoid/share/qml/OutputConfig.qml:26:1: QML OutputConfig: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead. qrc:/MultiSink/share/qml/main.qml:143:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } [swscaler @ 0x7f3384005300] deprecated pixel format used, make sure you did set range correctly segmentation error it seems to me something similar to: https://answers.launchpad.net/ubuntu/+source/webcamoid/+question/625014 but I cannot find the corrispective packages of: qml-module-qt-labs-folderlistmodel and qml-module-qt-labs-settings I'm running it on a 4K monitor 27" Reproducible: Always