odd quicktime resolution problem after compression

[Daniel Low]

Click here:

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There are no significant bugs in our released software that any significant number of users want fixed. … I’m saying we don’t do a new version to fix bugs. We don’t. Not enough people would buy it. You can take a hundred people using Microsoft Word. Call them up and say “Would you buy a new version because of bugs?” You won’t get a single person to say they’d buy a new version because of bugs. We’d never be able to sell a release on that basis.

Bill Gates. Focus Magazine No. 43 (23 October 1995)

[Dan Freshman]

thanks for posting that link, it was helpful in learning about this issue and PAR, however it does not exactly solve my problem.

I am working on a project where we are concatenating a series of movies in Quicktime Coffee and if the resolution is off, we encounter problems down the line. Specifically you can see in the properties of our concatenated movie in quicktime that if we append clips that have that different figure resolution: “Format 720×486(640×480)” in parenthesis then we end up with multiple audio tracks and multiple video tracks in the quicktime clip properties window. This is what causes problems.

Anyone have any explanation or fix to this?

thanks
dan

[Daniel Low]

[dan freshman] “Quicktime Coffee”

What is that?

What are you doing once you have finished concatenating, are you saving the clip as self contain or exporting out as a fresh new movie?

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There are no significant bugs in our released software that any significant number of users want fixed. … I’m saying we don’t do a new version to fix bugs. We don’t. Not enough people would buy it. You can take a hundred people using Microsoft Word. Call them up and say “Would you buy a new version because of bugs?” You won’t get a single person to say they’d buy a new version because of bugs. We’d never be able to sell a release on that basis.

Bill Gates. Focus Magazine No. 43 (23 October 1995)

[Dan Freshman]

QTCoffee is a collection of command line applications for manipulating QuickTime movies They can join (concatenate), multiplex, and split movies; they also perform various modifications and editing. https://www.3am.pair.com/

The resulting concatenated movie is just a reference file and does not create a fresh new movie. I then bring my movie into DVD studio pro and when I drag this asset into a track, the clips with resolution discrepancy do not show up and my video and audio tracks do not line up.

dan

[Daniel Low]

Cool, thanks, I’d not heard of that before.

[dan freshman] “I then bring my movie into DVD studio pro and when I drag this asset into a track, the clips with resolution discrepancy do not show up and my video and audio tracks do not line up. “

I’d kind of expect exactly that to happen. Can I suggest you flatten the movie by exporting as a fresh new self contained movie and see what happens?

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“There’s no chance that the iPhone is going to get any significant market share. No chance.”

Steve Ballmer To USA Today

[Dan Freshman]

That doesn’t work. I get the same multiple track listing in the properties window and both resolutions still exist in the inspector window.

Are there any settings that would be different for a quicktime export to make this work?

[Daniel Low]

Do you understand that 720×486 is a non-square pixel version of 640×480 square pixel?

Why don’t you just import the clips individually into DVDSP? and lay them on the same track?

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“There’s no chance that the iPhone is going to get any significant market share. No chance.”

Steve Ballmer To USA Today

[Dan Freshman]

Yes I understand that. But not really what that implies…Does that it was shot on footage that used rectangular pixels and that be converted? If not, doesn’t all footage have an equivalent in square/non-square pixels, why can’t It be one or the other, not both?

[Dan Freshman]

And also, if NTSC and PAL both use rectangular pixels, at what point do square pixels get utilized. As mentioned in your first post’s link, is that 640X480 only for computer monitors?

[Daniel Low]

It was shot using a sensor that uses non-square pixels.

Computer displays use square pixels.

Quicktime is telling you that it was natively 720×486 (480) but it is displaying it at 640×480

in the same way, HDV uses 1440×1080 but when displayed on an HDTV or computer monitor correctly it’s 1920×1080

__________________________________________________________________
“There’s no chance that the iPhone is going to get any significant market share. No chance.”

Steve Ballmer To USA Today