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Exporting quicktime adds .03 to the total running time.

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Lance Copeland
Exporting quicktime adds .03 to the total running time.
on May 18, 2011 at 10:29:33 pm

Does anyone know why when I export out a :30 Quicktime the process somehow adds 3 microseconds? Is there a way around that? It needs to be precisely :30 not :30.03

Thank you

Lance

For every vision there is an equal and opposite revision.


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Shane Ross
Re: Exporting quicktime adds .03 to the total running time.
on May 18, 2011 at 11:49:32 pm

Microseconds? Video doesn't do microseconds...it does FRAMES as the smallest measure of time.

Shane

GETTING ORGANIZED WITH FINAL CUT PRO DVD...don't miss it.
Read my blog, Little Frog in High Def


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Lance Copeland
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 12:19:01 am

[Shane Ross] "Video doesn't do microseconds"
Thanks Shane,

Can you explain to me why the timeline is exactly 900 frames and when I open the exported quicktime it says in the Inspector window that the duration is 0:00:00:30.03? The numbers after the "." go up to 100 when they flip over the next second, so I wasn't talking about frames.

I had a complaint from a broadcaster that my spot was "too long by 3 microseconds", although now that I think about it he must have meant centiseconds, considering the location after the point. Whatever, I just need to know why this is happening and if there is a work around. Or at the very least, has anybody had this happen before.


Thanks,

Lance

For every vision there is an equal and opposite revision.


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Shane Ross
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 12:24:05 am

Don't rely on QT's INFO window to provide you with accurate information. Typically it gets things wrong, like reporting 23.98 fps as 23.83fps.

I have NEVER been told by a broadcaster that my shows are milliseconds, or centi-seconds over. There is no such thing in video. Frames. No matter what QT is telling you. If the broadcaster you are dealing with uses that to tell you that you are milliseconds long...they are clueless. Probably also using QT to gauge the time. Clear sign of someone who doesn't know what they are talking about.

I never heard of this before you posed the question...and I have worked in broadcast TV for 12 years.

Shane

GETTING ORGANIZED WITH FINAL CUT PRO DVD...don't miss it.
Read my blog, Little Frog in High Def


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Rafael Amador
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 12:36:06 am

Fallow Shane's advice.
Seems that the 900 frames is a kind of standard for 30" adds delivery to avoid the possible differences in different players.
If you need real accuracy, rely only on the TC.
rafael

http://www.nagavideo.com


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Lance Copeland
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 12:39:47 am

[Rafael Amador] "If you need real accuracy, rely only on the TC."

Will do, thanks Rafael.

For every vision there is an equal and opposite revision.


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Lance Copeland
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 12:40:19 am

[Shane Ross] "I never heard of this before you posed the question...and I have worked in broadcast TV for 12 years."

Ok thanks.

I too had never had a complaint like that before in my 17 years. Frankly I never even thought to look at the time in the inspector until he complained, and sure enough it did say .03 over 30 seconds. Strange but I will take your assumption of the inaccuracy of quicktime and just keep doing my thing.

Thanks again Shane, I feel much better.

Lance

For every vision there is an equal and opposite revision.


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Thomas Aschenbach
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 1:19:24 am

This usually occurs because of extra audio samples. QuickTime shows the longest track element as length.

Tom Aschenbach
http://www.videofilmsolutions.com


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Lance Copeland
Re: Exporting quicktime adds .03 to the total running time.
on May 19, 2011 at 1:36:26 am

[Thomas Aschenbach] "This usually occurs because of extra audio samples."

That was the first thing I looked at, but the audio came to me already mixed and is actually less than :30, Strange, but I'm not going to worry about it. If the guy says something about it again, I'll tell him he needs to quit worrying about it too.

:)

Thanks again for the prompt help on this one!

Lc

For every vision there is an equal and opposite revision.


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