[ardour-dev] Timecode computation error

[Chris Goddard]

Hi

As per Paul's request here is a bit more info relating to Mantis bug 1329.

It seems that when setting different frame rates in the 'Options' -> 'Timecode 
fps' menu, the correct frame count is not always set.

When selecting 25fps I would expect the timecode to count 25 frames per 
second, i.e. 0 -> 24.

If I select 24.976 I would expect the frame count to be 25 frames per second 
again (0 -> 24) but just running slightly slower.

Here is a full list of my findings

Frame rate	Actual count	Expected count	
-----------------------------------------------------------------------------------------------
23.976               23                       24                    Incorrect
24                      24                       24                    Correct
24.976               24                       25                    Incorrect
25                      25                       25                    Correct
29.97 (d or nd)   30                       30                    Correct
30 (d or nd)        30                       30                    Correct
59.94                 59                       60                    Incorrect
60                      60                       60                    Correct


Hope this makes sense.

As a side note, not sure it's really necessary to include 29.97ndf and 30df 
options. These are, strictly speaking, not valid options and lead 
non-realtime timecode/frame counts.

-- 
Cheers

Chris