It seems this is a regression of this commit: https://invent.kde.org/plasma/kpipewire/-/commit/09124fb076346d0134c631966cdf6513b851708c This: ``` if (!m_encoder) { // Clear the queue of encoded packets. m_encoder->receivePacket(); } ``` causes a null pointer de-reference and should be fixed to: ``` if (m_encoder) { // Clear the queue of encoded packets. m_encoder->receivePacket(); } ``` The segfault is then gone. There also seems to be an upstream bug report: https://bugs.kde.org/show_bug.cgi?id=484620