@SGaist Thank you. I tried using ffmpeg and it works like a charm.

Hi,

A QMediaRecorder to the mix.

thank you, @eyllanesc, now it works as I expect...thank you very much for so much assistance and readiness :)

@Cleiton-Bueno thanks for your suggestion. I have disabled audio in my kernel completely now. Now I get the message CameraBin warning: "Could not open audio device for recording." which shows, that I really removed audio support.
Unfortunately, this still doesn't solve my basic issue, which is a extremely sluggish video output when the videoRecorder property is enabled in the Camera. That means, the audio encoding was not causing this problem at all.

Thx, Jens

Hi and welcome to devnet,

You could consider implementing you own QtMultimedia backend, that way you can also manage the file writing.