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Re: DV datecode from QuickTime?
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Re: DV datecode from QuickTime?



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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References: 
 >DV datecode from QuickTime? (From: Bruce Sharpe <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Andreas Kiel <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Bruce Sharpe <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Patrick Sheffield <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Bruce Sharpe <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Darrin Cardani <email@hidden>)
 >Re: DV datecode from QuickTime? (From: Brian Gardner <email@hidden>)



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