[PD] pix_record issues with geos and frames per second

chris clepper cgclepper at gmail.com
Sun May 10 16:34:45 CEST 2009


On Sun, May 10, 2009 at 10:16 AM, Roman Haefeli <reduzierer at yahoo.de> wrote:

> i am not totally sure, if this still applies, but iirc, [pix_record] has
> a hardcoded framerate of 20fps.


This was never the case with pix_record on OSX and Windows.  The pix_record
object on those platforms records actual framerate by timing how long each
frame takes to render and compress.  Each frame can have a different length
and this is the equivalent of dropping frames during recording.  There is a
minimum frame time of 20 Quicktime ticks, which corresponds to 30 fps
maximum rate.  A typical pix_snap and pix_record movie will have a variable
frame rate which Quicktime apps have no problem playing.

What pix_record is not suitable for is recording an exact 29.97 DV clip like
Final Cut or Avid does.
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