not quite, there is analog video which was/is NTSC and there is digital
video which is ATSC
which can be one of many formats either interlaced or progressive at
various resolutions
and frame rates.
jco
On 1/2/2015 11:12 AM, Steve Cottrell wrote:
On 2/1/15, Daniel J. Matyola, discombobulated, unleashed:
Does or has anyone on list use/used a Go Pro camera? Is so, what have
you sued it for, and what do you like and dislike about it?
Any tips about how to use and operate it to advantage would be appreciated.
Now there's a thing. Hints and tips! I'll try and keep this short as I'm
heading off for a nap before traveling to Exeter for a job tomorrow.
Set the thing up properly first - go into the menus (link up the gopro
wifi to an iphone preferably, much easier to make the changes on a menu-
driven app rather than pressing buttons on gopro).
For starters, you're NTSC, so make sure it is switched to NTSC and not PAL.
You're shooting video on the kayaks and canoes? if stills, hit the
largest res and go. If video, select a resolution that suits your end
viewing requirements. Most will shoot 1920X1080 which is High
Definition. Note that you can always down-size later for a more
comfortable web-viewing size. In the USA your standard frame rate will
be 29.97 or 30fps.
<https://documentation.apple.com/en/finalcutpro/usermanual/
index.html#chapter=D%26section=4%26tasks=true>
A brief description of interlaced and progressive video:
<https://us.en.kb.sony.com/app/answers/detail/a_id/42932/~/what-is-the-
difference-between-interlaced-and-progressive-scan-video%3F>
24p will produce 24 separate images in one second of video. 24i will
produce 24 frames of 2-fields each = 48 separate images in one second of
video. The 24p will be a bit more 'jittery' giving a film-like look. 24i
will be a smoother 'video' look.
In broadcast TV all material is shot in interlaced (hence 1080i) and
broadcast interlaced. Cathode ray tube TVs display interlaced images.
All LCD and LED and Plasma TVs display progressive images - they
convert on the fly in real time to progressive as you view. For web
viewing any interlaced footage needs to be converted into progressive
footage otherwise you will see nasty horizontal artifacts on any moving
images. So it may be as well to shoot progressive (eg 1080p) with the
gopro as you will no doubt want to share the video for viewing on
computers or other LCD screens. Shooting at 720p is another option, less
resolution but for web viewing, not a problem.
Note that there are settings for 'wide, medium, narrow' and these relate
to field of view. The gopro lens is fixed and cannot be zoomed, except
by this method. So if the image is too wide for your taste or needs, set
to medium for a less distorted image.
Otherwise, attach it securely and hit record :-)
Note that the gopro will readily sink if it gets knocked off the kayak
etc. Unless you buh and attach a 'floaty back door' or similar. Or run a
lanyard through the mount and tie off to the kayak.
They are amazing fun and you'll have a blast.
Cheers!
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