more information
https://febon.blogspot.com/2018/09/how-to-use-external-camera-to-stream-on.html
instagram DO NOT suport the PC base and the thrid party software
We just use Android instagram app to add external camcorder by FEBON capture card
1. instgram just support 9:16.
it can not support 16:9
2. the external camera view angle will be cut
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