[mythtv-users] is it really 29.97 fps or 24 fps?
Kevin Ross
kevin at familyross.net
Fri Sep 3 18:31:25 UTC 2010
On 09/02/2010 07:55 PM, Brian J. Murrell wrote:
> When I play a recording of a given television show (a drama, so filmed
> on real film, not video tape) recorded from clearqam with mplayer, it
> says about it:
>
> VIDEO: MPEG2 720x480 (aspect 2) 29.970 fps 15000.0 kbps (1875.0 kbyte/s)
> [V] filefmt:29 fourcc:0x10000002 size:720x480 fps:29.970 ftime:=0.0334
>
> Yet if I step through it a frame at a time with `.' I can see quite
> clearly that it's (a) not interlaced but progressive and (b) that there
> are 24 frames in every second played.
>
> So that seems to make it quite obvious that the MPEG that my cableco
> sends is the original 24fps progressive frames from film. I guess the
> expectation is that whatever is displaying that to a CRT TV will
> telecine it. But I digress.
It's already been telecined long before it gets to your house. Long
before it gets to the cable company, even.
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