Saturday, June 27, 2020

Analog vs Digital FPV Video

So the other day I was wondering if I could test analog vs. digital on the same platform (RC car). DJI goggles influence the analog reception a bit - but it worked.
Quick and easy solution was to strap on a little DJI FPV copter on my RCCar and drive around carefully with both video signals recording.
Both set to 25mw with same antennas.

Here I try to compare analog vs. Digital, on a car (low to the ground is always a challenge for RF). With a car you can drive beyound video range without crashing!
That being said, even with lowest power (25mw) the DJI FPV feed didnt break up completley when I drove down in the garage, behind LOS with lots of metal objects.
See the DJI OSD data (Bitrate and Signal) and how ImmersionRC 25mw VTX combined with Immersions Rapidfire compares to this…

TIPP: If you like the DJI OSD overlay in my video: download this script which will "re-format" the subtitle file. For nicer playback and only displaying of important infos. I have a few different versions of this re-formatter...
To simply playback the DJI files with OSD on your computer use "VideoLan Client" Player (free software) - it will display the SRT (subtitles) in realtime.
If you want to use this in a video editor - it's a bit more work. If there is enough demand I will make a little tutorial... (Hint: you need the free X-Media Recode)

Furadi show's how he can fly a spot with DJI which was almost impossible with analog (due to heavy multipathing there):


MrSteele's Analog vs Digital Video:


Frequncies table - nice overview:

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