This mod uses the MQTT topic /stream to receive binary color values in RGBW format. The image is shown for realtimeTimeoutMs and than replaced with the default values.
Activate usermod by adding -D MQTT_STREAM to the build flags
This usermod listens on [mqttDeviceTopic]/stream and
[mqttGroupTopic]/stream for binary data that is shown
on the LED strip itself. The length of the binary data
must be 4*LedCount otherwise the data will be ignored!
A demo stream generator can be found here: WLED-MQTTStreamer