[dba-Tech] A few questions about media files

Gustav Brock Gustav at cactus.dk
Fri Feb 15 10:51:26 CST 2008


Hi Bryan

PAL is always 25 fps. 
For NTSC a lengthy discussion can be found here:

  http://en.wikipedia.org/wiki/Talk:NTSC 

You may need something strengthier than a Miller Light after perusing this in detail.

/gustav

>>> carbonnb at gmail.com 15-02-2008 17:19 >>>
On Fri, Feb 15, 2008 at 11:03 AM, Erwin Craps - IT Helps
<Erwin.Craps at ithelps.eu> wrote:

>  AVI and MPG/MPG are video formats having a constant frame rate per
>  second. For internet usually 15 frames a second. DV and DVD has 25
>  frames a seconds, PAL 29,97 frames (or something) seconds, NTSC 30 I
>  believe.

Not that it matters that much, but PAL is around 25 (don't know the
actual number) and NTSC is 29.97. NTSC used to be 30 in the days of
Black & White, but when they had to add the colour information to the
signal then did some fancy math and came up with 29.97 as the frame
rate for NTSC. Let's not even talk about ATSC (North American Digital
Over The Air Broadcasting standards).

Like I said, it doesn't much matter, but it's one of the few things I
can remember these days,

-- 
Bryan Carbonnell - carbonnb at gmail.com 
Life's journey is not to arrive at the grave safely in a well
preserved body, but rather to skid in sideways, totally worn out,
shouting "What a great ride!" at an age of 27 ...





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