The video feed, however, it’s never higher than 1080p and 25/30fps (fps depending if set to PAL or NTSC). The settings you are recording to the SD Card don’t alter the stream resolution. (They do alter the colour depending on recording settings - but the app has compensations built in to make the stream “appear more normal” on your device.)
Have you checked the “Image Transmission Settings”?
- Transmission Quality
- Normal/HD/Smooth Modes
If in doubt - reset to default.
I have mine as shipped, perhaps I changed from Normal (720p?) to HD Mode (so long ago I don’t recall the default setting), and have always had perfect streaming and caching, even from more than a couple of kilometres.
Not really sure of the furthest I’ve reached without breakup … but further than I usually range … and probably ( ) beyond VLOS.
But, honestly, since the Mavic kit works that well out of the box, without changing settings, I’d be more inclined to focus on the cable and the phone.
From personal experience, with my first (Android) phone I used briefly with my MP, which had a worn USB connector, you’ll probably have Go4 complaining about overall connection issues before you lose video “quality”. New phone, never had a connection problem since - and another reason I keep one phone as my dedicated MP device.
If the problem persists with a different phone/cable - then we’re talking about a fault within the Mavic or the RC.
If I live a lot closer - I’d be more than happy to try swapping our controllers over to see if the problem moves with the controller or the Mavic.
Let us know how things progress.