18 Nov
2014
18 Nov
'14
12:05 p.m.
On Fri, 17 Oct 2014 23:09:50 +0200
Carsten Kurz <audiovisual(a)t-online.de> wrote:
Am 17.10.2014 um 22:59 schrieb Tom Rovak:
What might change with delay when the frame rate changes? It is
expressed in milliseconds, so independent of frame rate.
Good question. If I get them separately, I master
my picture and
audio together first. But yes on other DCP software there has to be
a frame accurate correlation between picture and audio to make that
adjustment. But I sometimes get audio that starts at 2 beep, and
picture starting at Picture Start. How would it handle that? Even
at the same frame rate? Is there an adjustment for delaying audio
for sync purposes, then keeping it in sync once a frame rate
adjustment has been made?
Sync delay or offset is possible with the controls under audio and
Trimming/Position. But then again, what happens when the frame rate
is changed? Of course, normally you would assume that with
separate audio and
video imported they have been aligned externally and will be used
like this.
But still, you could import separate audio and video with a common 25
fps reference, then change the video framerate to 24 fps in
DCP-o-matic. In that case, audio resampling should be applied
accordingly. Maybe DCP-o-matic even does that now - but it seems
currently it is not indicating it the way it's doing it with
interleaved video/audio?!
If I understand right, this lack of indication is fixed in 1.76.x
(there is now a note in the Audio tab about what resampling will be
done).
Best regards,
Carl