Thx paul but im looking to make the proxy setting in the player permanent only for debugging purposes because my laptop is behind a corporate proxy. Our app is not using a proxy if it is running on a phone. Now my current solution is in QT Creator is start player via tools>external>player and i edited the arguments for starting the player under tools>external>configure and deleted the arguments under player so that the player opens in the normal and you can access the proxy settings. Then set the proxy settings and don't close the player 🙂 Now i can use my app with the proxy. Annoying thing is every time the player closes you need to set the proxy again. Maybe this also works for you.
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