Re: DV datecode from QuickTime?
Re: DV datecode from QuickTime?
- Subject: Re: DV datecode from QuickTime?
- From: Darrin Cardani <email@hidden>
- Date: Mon, 29 Jun 2009 11:17:45 -0700
I don't understand what you mean by "travel with the clip." The clip
is on disk, and the metadata is generally stored inside the same file
which contains the frames of video. So if you move the clip to another
disk, or wherever, the metadata will move with it. The XML files which
describe an FCP or Motion project point to the original video file on
disk, so 3rd party apps just need to access the original video file at
the path stored in the XML project file to get at the metadata (if
they know how to do that).
In the timeline, clips get chopped up and rearranged, so I'm not sure
it would make sense to associate said metadata with any one or all of
the pieces of the original clip. It would probably depend on the type
of metadata. Regardless, it doesn't currently happen in any way other
than as I described above.
There are no mechanisms within the FxPlug API for dealing with
metadata. I believe that QuickTime Components could potentially create
and ingest said metadata, but I don't believe the apps will do
anything with it. And there's no way to get that metadata to an FxPlug.
Darrin
On Jun 29, 2009, at 10:34 AM, Brian Gardner wrote:
Out of curiosity.... In the pro apps, does QT metadata
generally travel with the clip?
I mean, if QT did support certain metadata, like datecode,
are the pro apps constructed to have that metadata
stay attached to the video clips, inside the pro apps?
Or does that metadata only exist if it is converted
into a separate track or converted into an existing
data mechanism (like timeline position, duration, etc)?
For example, could an import plugin (or even a FxGenerator)
store metadata within a clip's data, which that an FxPlug (filter or
transition)
could later catch/access that metadata and respond to it?
-- Brian
On Jun 29, 2009, at 9:18 AM, Darrin Cardani wrote:
You might get a better answer to this question on the QuickTime
list, since (I think) the DV codec is part of QuickTime. You can
sign up at:
<http://lists.apple.com/mailman/listinfo/quicktime-api>
Darrin
On Jun 26, 2009, at 9:15 PM, Bruce Sharpe wrote:
CatDV probably does read it, but I'm not looking for an
application, I
want a programming interface.
Bruce
On Fri, Jun 26, 2009 at 9:09 PM, Patrick
Sheffield<email@hidden> wrote:
Doesn't CatDV read the Meta Data?
Patrick
On Jun 26, 2009, at 10:04 AM, Bruce Sharpe wrote:
Thanks, Andreas, I'll do that. For what it's worth there seems
to be
lots of information about how to do this with video in AVI
format but
not QuickTime.
Bruce
On Fri, Jun 26, 2009 at 9:37 AM, Andreas Kiel<email@hidden>
wrote:
Hi Bruce,
Though I can't help you I would recommend to google for
recording format
descriptions and their matching SMPTE docs which do describe
these
formats.
This might be a bit difficult as often the SMPTE docs have to be
purchased.
There is nothing "ready made" which comes which the OS.
Regards
Andreas
On 26.06.2009, at 18:18, Bruce Sharpe wrote:
I'm trying to figure out how to get the time-of-day
information that
is encoded in DV/HDV formats (and others?). This is variously
called
datecode or datacode or time-of-day code. It is not timecode
(although
many people confuse the terms).
I've spent a day Googling and grepping QuickTime headers etc.
but
haven't come up with anything. Can someone point me in the
right
direction?
Bruce
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Darrin Cardani
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