Re: QT Rates
Re: QT Rates
- Subject: Re: QT Rates
- From: Andreas Kiel <email@hidden>
- Date: Fri, 6 Aug 2010 09:23:29 +0200
Could it be a pull down thing? Seems to me that this happens here.
Andreas
On 06.08.2010, at 07:20, Rainer Standke wrote:
I fully agree, something is not right. The user has actually
remedied the situation on his end by re-importing the clips or
something like that. I am specifically worried not about this case,
but overall about what cases we should anticipate.
As I said, I am aware of first and maybe last frames of clips to be
wonky, i.e. not standard length. As a matter of fact I went through
the trouble of specifically looking at the second sample and its
length to get the sample duration, but that turns out not to work
for h264s for some reason.
I guess my question is how does FCP figure out the frame rate of
movies, and in what case should we expect to see different frame
rates between clip and video?
Thanks,
Rainer Standke
XMiL Workflow Tools
http://www.xmil.biz
On Aug 5, 2010, at 22:08 , Piers Goodhew wrote:
*Normally* I say this:
FCP reports the "specified" frame rate of the movie - i.e. the
movie says "I'm a 25fps movie" (even though frames can have
totally different duration.)
QT Player (even the hated new one) reports the frame rate as the
duration divided by the number of frames. As it's quite normal to
have your first and last frame a bit wonky, you nearly always get
some strange decimal number, esp. on short movies.
So usually I say "nothing to worry about, move on". But to have QT
say exactly 23.98 and FCP 29.97 - I think something more is going
on here, something's not right.
PG
On 06/08/2010, at 2:27 PM, Rainer Standke wrote:
Thanks Marshall. I am aware of the fact that as a format
QuickTime allows for each video frame to have a different
duration. To my understanding, FCP only deals with QT files that
have no more than one video track, right? So, in the context of
FCP, and XML files exported from FCP, when would it ever make
sense for a QT file to have different rates for the clip and its
video file?
Rainer
On Aug 5, 2010, at 20:35 , Marshall Eubanks wrote:
On Aug 5, 2010, at 9:36 PM, Rainer Standke wrote:
Hello,
one of my users came up with something somewhat surprising. He
had a QT movie that reported a clip frame rate of 23.98 and a
video frame rate of 29.97 within FCP (CMD-9). The genesis was
unclear (as in: there was no way to figure out how he had
gotten there). The footage had been shot in a Canon still
camera (Mark 2 5D?).
This leads to the question: Are there ever times when the
clip's frame rate is not the frame rate of the video? Or is it
safe to assume that the clip's frame rate is always going to be
the same as the clip's video's frame rate?
Frames can always be dropped by the encoder so, no, it is not
safe to assume that.
Regards
Marshall
Thanks,
Rainer Standke
XMiL Workflow Tools
http://www.xmil.biz
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| References: | |
| | >QT Rates (From: Rainer Standke <email@hidden>) |
| | >Re: QT Rates (From: Rainer Standke <email@hidden>) |
| | >Re: QT Rates (From: Rainer Standke <email@hidden>) |