[Ardour-Dev] Ardour Timecode
robin at gareus.org
Wed Oct 31 19:18:03 PDT 2012
On 10/31/2012 06:04 AM, Reuben Martin wrote:
[message re-arranged from top-posting]
> On Tuesday, October 30, 2012 05:39:29 PM John Emmas wrote:
>> On 30 Oct 2012, at 16:56, Robin Gareus wrote:
>>> Are you saying that 29.97 NDF == 30000/1001 but 29.97 DF == 29.97 ?
>> No, I'm saying that the intention of dropframe timecode is to drop
>> (precisely) 108 frames per hour from a source that hitherto ran at 30fps.
>> 30 x 1000 / 1001 is not the right formula for achieving 108 dropped frames
>> per hour.
>> 30 x 999 / 1000 is the correct formula.
>> I don't use 29.97 NDF but as far as I can tell, 30 x 999 x 1000 would still
>> be the correct pulldown formula.
>> I've never encountered 30000/1001 in my own timecode workings but as I say,
>> I'm not in a region that uses dropframe or 29.97.
> No that's correct.
huh? That statement is ambiguous. What is correct?
> When analog and digital worlds collide, it's a PITA.
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