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Removing Aperture info from FCP7 QT files

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Robert Longwell
Removing Aperture info from FCP7 QT files
on Aug 22, 2010 at 12:21:26 am

Long story short, I have a "client" who's transcoding farm will incorrectly transcode any QT ProRes file created by FCP7 due to the aperture tags. They will only accept files created in FCP6 or FCP7 files that have been re-compressed in Compressor 3.5.2 which can strip the aperture. Quite honestly that's a massive amount of re-transcoding to remove some metadata and very time consuming.

Does anyone know of any tools that can strip the aperture info out of a QT file? Preferably something object C based so we can automate this via command line.

Thanks!

Robert Longwell


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Rafael Amador
Re: Removing Aperture info from FCP7 QT files
on Aug 22, 2010 at 2:10:31 am

Hi Robert,
Bouke Vahl has an application called QTChange that can batch modifie QT files properties.
I don't see Aperture as an option, but you can talk with the developer (Vouke valh):
(http://www.videotoolshed.com/product/42/qtchange/2)

You can have a look as well to those QTTools:
http://www.omino.com/sw/qt_tools/
Rafael

http://www.nagavideo.com


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Bouke Vahl
Re: Removing Aperture info from FCP7 QT files
on Aug 22, 2010 at 9:46:52 am

QTchange can set the 'current' and 'normal' size.
In some cases that will do the trick just fine. (Aperture does the same but has another approach.)
Just test it, it'll be a very fast process.

Bouke

http://www.videotoolshed.com/
smart tools for video pros


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 22, 2010 at 4:23:58 pm

No sorry QTchange didn't remove the aperture. And QT tools doesn't modify these either. Still searching...

Thanks!

Robert Longwell


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Bouke Vahl
Re: moving Aperture info from FCP7 QT files
on Aug 22, 2010 at 4:33:41 pm

I know it can't alter the aperture.
But that could not be needed. Chances are that with new display settings the other app. will see it in it's native resolution.
(so that needs to be tested...)

Otherwise, use FFmpeg with -vcodec copy etc....

Bouke

http://www.videotoolshed.com/
smart tools for video pros


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 22, 2010 at 7:09:03 pm

This issue isn't the display settings. The issue is the mere presence of the clap size 1888x1062, that's what their transcoder sees.

I found that I can edit this value in dumpster in 2 locations. In this case I edited them to 1920x1080:



The catch is I need to automate this, we can't do each one of these by hand.

Robert Longwell


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Carsten Orlt
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 12:55:17 am

Just tested dumbster because I didn't know it and I do not have half the info in my ProRes files you have. And certainly no Aperture info.

Maybe you could describe how you create those QT ProRes files.

Alternatively have a look at CatDV. Might (or might not) be able to help :-)

Cheers

Carsten


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 1:36:35 am

It is an export straight out of final cut 7. It's just 10 seconds of bars and tone and a chapter marker track. Really no frills here.

Robert Longwell


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Carsten Orlt
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 2:22:39 am

Hmm. I opened (in dumbster) a QT ProRes file I captured from using FCP7.

Sorry I think this is beyond my knowledge. Hope somebody else can help.

Cheers

Carsten


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Rafael Amador
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 2:04:16 am

Hi Robert,
Pictures comes out of FC with "Production Aperture".
I don't think you must chance Aperture dimensions , but flag the files as one of the tree Aperture options.
I guess you need to change just one value in the file, but really I don't know where.
Rafael
PS: I've never used Dumpster before. Is very interesting.

http://www.nagavideo.com


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Bouke Vahl
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 11:46:28 am

well, besides FFmpeg, why not Applescript QT?

Bouke

http://www.videotoolshed.com/
smart tools for video pros


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 2:21:37 pm

QT Pro doesn't expose the atoms so they can't be edited there.

Tell me more about FFmpeg. It can edit a QT file?

Robert Longwell


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Bouke Vahl
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 2:29:50 pm

QT pro does let you switch the aperture...
Would be the easiest way.
(check the properties, last tab i believe)

FFmpeg can handle QT just fine (but not QT ref containing multiple clips)

Experiment with ffmpeg -i input -vcodec copy -acodec copy -aspect 16:9 output.mov

But you'll loose TC info. (Not sure if that's important to you...)

Bouke

http://www.videotoolshed.com/
smart tools for video pros


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 7:29:25 pm

No, QT only lets you change the presentation setting (Classic, Production, Clean, etc) not the actual aperture value.

TC is very important, so I guess I'll have to skip FFmpeg.

Thanks!

Robert Longwell


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Bouke Vahl
Re: moving Aperture info from FCP7 QT files
on Aug 23, 2010 at 9:08:28 pm

That sucks....
I would think that if you set the params in QT, you 'should' end up with a clean QT....

However, i am able to use FFmpeg AND add the TC to the fresh file.
And i'm probably able to create you some custom code to get from A to B.

Contact me direct if you like, we probably can work something out.

Bouke

http://www.videotoolshed.com/
smart tools for video pros


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Aug 27, 2010 at 7:21:54 pm

Thanks, but we may have written something to strip out this data.

Robert Longwell


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Marc Cuevas
Re: moving Aperture info from FCP7 QT files
on Sep 9, 2010 at 1:48:31 am

I'm familiar with this problem. And it is the mere existence of the 'clap' atom that causes the problem.

I've been using Compress 3.5.2 to fix the issue, let me know if you've succeed in writing something for stripping that atom.


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Sharif Khan
Re: moving Aperture info from FCP7 QT files
on Sep 23, 2010 at 8:04:30 pm

I was recently having a similar issue, but we seem to have found a solution. JES Extensifier http://www.apple.com/downloads/macosx/video/jesextensifier.html will edit the individual atoms, and it batches. I personally have not used it yet, but it has already been implemented into our workflow, so I imagine it has been approved. Let me know how that works for you. :-)


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Robert Longwell
Re: moving Aperture info from FCP7 QT files
on Sep 27, 2010 at 4:19:05 am

Sharif,

This is a great tool. Your post was perfectly timed!! Thanks so much!!

Robert Longwell


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