Export 4k video for Facebook native video?

Question

Hi All,
I am trying to export a 4k video to upload on facebook for its native video player.
I have converted to mp4 the best suggested format but a crackling sound comes with it.
Can anybody help?
Thanks.

Answer 1

Whether a 3.5mm "mini" jack or the older, larger 1/4" "phone" jack, the plug or "jack" can be either mono or stereo. A mono jack has a single "main" post for the sound signal, with an insulator near the end and a second bit of isolated metal for the tip as the "ground". A stereo jack has two sections in the "main" part, with a thin insulator between them, and the insulated tip ground.
The socket the plug fits in can also be either stereo or mono. A mono socket will have only one post touching the main stem of the plug for signal, and a second post touching the tip for the ground. A stereo plug will have two posts touching the stem, one to receive left channel signals, one to receive right channel, and of course a third for the ground.
If you look at the parts, you'll see that a standard mono plug will deliver signal to both left & right posts of the standard stereo socket. Most mono mics are wired this way. These you'll probably never need think about.
The situation you're dealing with is that your mic is mono but uses a stereo jack, and is only wired to deliver to one channel ... which can be both useful and a total pain, depending on how well you're set up to utilize the options this can provide. Depending on adapters & cords, you can change this to deliver the same signal to both L & R, or you can use this mic and another one to deliver separate mics one to the left channel & another to the right channel, effectively giving you a second input on the one "channel".
But what bits do you need?
A stereo to mono adapter plug would take your current plug in one end, take the signals from "both" channels, combine & deliver that to a mono plug on the output end ... plug you mic into this, plug it into your recorder, and instantly your mic is being input into both channels of your recorder as this sort of adapter has a mono plug on it's output end. This is probably the simplest part to get you up & running now. Any local shop that sells electronic bits & pieces, like a shop for guitars & such, will have these in-stock and they're cheap.
I also just got a couple mics that are mono but use a stereo jack with one channel "dark" ...dead ... unused. I'll be getting some adapters myself, probably just gaffer tape the things together.
Neil