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View movies frame-by-frame in QuickTime Player 7 Apps
I guess this must be new in QuickTime Player 7 as I haven't seen it before, and haven't seen any documentation for it.

You can now move the movie frame-by-frame, backward or forward, via the scroll wheel on a so-equipped mouse. If the movie is already playing, it will enter pause mode and then step frame by frame. Roll the wheel "up" for forward, and "down" for backward.

[robg adds: I thought we'd run something on this already, but I can't find it...]
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View movies frame-by-frame in QuickTime Player 7 | 21 comments | Create New Account
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View movies frame-by-frame in QuickTime Player 7
Authored by: TylerL on Jun 15, '05 10:38:33AM

This worked nicely in older OS X QuickTime versions too.



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View movies frame-by-frame in QuickTime Player 7
Authored by: unforeseen:X11 on Jun 15, '05 10:51:21AM

I was about to say that. =)



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View movies frame-by-frame in QuickTime Player 7
Authored by: thelamecamel on Jun 15, '05 11:10:53AM

And don't forget you can do this with left and right arrow keys too! (since OS 9)



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You mean "since the beginning of QuickTime"
Authored by: PopMcGee on Jun 16, '05 03:07:18AM

This has been a features since QT1.



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View movies frame-by-frame in QuickTime Player 7
Authored by: johnseal on Jun 15, '05 11:45:25AM

> Roll the wheel "up" for forward, and "down" for backward.

That's opposite from the convention for text documents, where "down" means "towards the end". Why do you suppose they did that?


---
Do quantum pirates make you walk the Planck?



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View movies frame-by-frame in QuickTime Player 7
Authored by: boredzo on Jun 16, '05 01:37:48AM

Roll the wheel "up" for forward, and "down" for backward.

That's opposite from the convention for text documents, where "down" means "towards the end". Why do you suppose they did that?

analogy with the volume control from three versions ago?



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View movies frame-by-frame in QuickTime Player 7
Authored by: tji on Jun 15, '05 01:07:21PM

I'll have to check this out.. I tried this in previous versions of QT, but the frame-by-frame detail was not what I was expecting.

I was trying to use it for analysis of sports video (golf swing videos), but the frame by frame mode seemed to skip frames. The Windows software to do the same gave much more detailed frame advances.

If a good video display library could be combined with some simple drawing tools to overlay the video, it makes for a powerful analysis tool.



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View movies frame-by-frame in QuickTime Player 7
Authored by: silicontrip on Jun 16, '05 12:47:20AM

Are you looking at interlaced DV files? Say taken from a video camera captured via firewire?

If you are, Quicktime intelligently (or not), deinterlaces the streams to be 25 or 29.97 progressive, by dropping every second field. This may be where your information is going.

I've been using quicktime to do frame accurate analysis and haven't experienced any frame loss apart from the above problem (or feature).



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View movies frame-by-frame in QuickTime Player 7
Authored by: tji on Jun 16, '05 01:39:36AM

Yes, it's interlaced video from a DV camera. I think you're right.

Is there any way to override this "feature"?

I guess my other option is to get a DV camera that supports progressive capture. That 720p camera from JVC would do nicely.. :)



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View movies frame-by-frame in QuickTime Player 7
Authored by: whom on Jun 16, '05 07:45:13PM

Could you be more specific about what is better about Windows in frame stepping. In all movies I open in QuickTime, stepping with the arrow keys steps forward one frame at a time (the minimum possible). I don't see how any application could step at any less interval unless it is stepping by field (assuming 60 fields per second).

In the case of an application stepping by field, it must do interpolation to create a frame representing 1/60th of a second using 1/2 of the frame information.

In the case of analyzing a golf swing, you really need a higher frame-rate camera. Or, you can use the information in the camera you have (29.97 frames per second/60 fields per second) and create another QuickTime track to create the analysis track. True analysis will require an application which extracts information regardless of operating system.

Any application that understands the video format can extract information for analysis. The QuickTime format allows for saving that information in another time-based track assuming the application understands your need.

If you are not getting the frame accuracy you require check your capture settings. If your capture frame rate is 30 frames per second, most viewing applications should be able to step at that rate.

http://newton.physics.wwu.edu:8082/jstewart/scied/physics/video.html
http://www.vernier.com/soft/lp.html
http://www.motion.com/products/measurement/index.html
There are probably more



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View movies frame-by-frame in QuickTime Player 7
Authored by: silicontrip on Jun 16, '05 08:14:07PM

The only thing I am aware of is to convert the DV file into something else first.

The simple way is to use a tool like this

I haven't used this tool, but have spoken with the author on video processing forums and he knows what he is doing.



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View movies frame-by-frame in QuickTime Player 7
Authored by: Phosphor on Jun 15, '05 01:19:04PM
I was surprised to discover that, since upgrading from QT Pro 6.x to QT Pro 7, when I have a QT-run file open in Firefox that clicking on the "back" button I've programmed (Command + [) into my Logitech mouse will cause the file to start playing backwards.

It can be interesting, and/or it can be annoying.

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View movies frame-by-frame in QuickTime Player 7
Authored by: mayo2ca on Jun 15, '05 09:59:41PM

Yeah, but it depends where the focus is. The back/forward mouse buttons do the same (if you have mouse with the extra two buttons). If the focus is on the page, it will go back, and if the focus is on the movie it will play backwards.



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View movies frame-by-frame in QuickTime Player 7
Authored by: Whosawhatsis on Jun 15, '05 04:38:53PM

That's weird... in quicktime 6 it worked in the opposite, more logical direction (down = forward, up = backward). It also worked with left/right scrolling, but that controls volume now...

---
I was offered a penny for my thoughts, so I gave my two cents... I got ripped off.



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Good hint!!
Authored by: allanBook on Jun 16, '05 01:44:11AM

Since I view most of my quicktime files in full screen, worrying about the pointer's focus is a non-issue.

I was wondering, though, if anybody knew a way to skip ahead and backwards by 10-second or one-minute increments via scroll wheel or kb shortcut, cuz that would be an even better hint.

---
"Mr. Simpson, this is the most blatant case of fraudulent advertising since my suit against the film The NeverEnding Story." -Lionel Hutz (of Simpsons fame)



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Use MPlayer
Authored by: PopMcGee on Jun 16, '05 03:11:34AM

Maybe you already know this, but with MPlayer (which is quite compatible with most quicktime files), you can press the forwards/backwards arrows to jump 10 seconds, and the up/down arrows to jump 1 minute forwards+backwards.

http://mplayerosx.sourceforge.net/

Cheers!



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Use MPlayer
Authored by: Tom Robinson on Jun 17, '05 01:56:17AM

Plus Page Up and Page Down for (about) 10 minutes. But like johnseal says, it's Page Up to go forwards, and Down to go backwards. The opposite to all other scrolling. Sigh.



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MPlayer does do it, but...
Authored by: allanBook on Jun 16, '05 10:20:15AM

Both mplayer and vlc do allow skipping ahead and backwards in those increments, but vlc locks and crashes so much for me and I can't stand how mplayer starts off at max volume whenever I drag and drop a movie file to open it :-(.

I was hoping for a more quicktime-native solution, seeing as how I paid for the pro license and was hoping there was some undocumented kb shortcut scheme to achieve the same.

I do appreciate how qt pro allows one to play video files at different speeds, but I hate having to open a menu and click-dragging with a mouse in order to do it.

Oh well, maybe in QT8 (or if I can get cellulo to run under 10.4.1).

Thanks anyway ^_^.

---
"Mr. Simpson, this is the most blatant case of fraudulent advertising since my suit against the film The NeverEnding Story." -Lionel Hutz (of Simpsons fame)



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MPlayer does do it, but...
Authored by: swedentom on Jun 16, '05 12:23:59PM
Good hint!!
Authored by: whom on Jun 16, '05 08:54:41PM
You could drop an applescript application like this in your dock. Or, use a key macro application to automate is (iKey, Xing, QuickSilver, Butler, Quickkeys, etc)

tell application "QuickTime Player"
	set timeScale to time scale of front movie
	set currentTime to current time of front movie
	set newTime to (currentTime + timeScale * 10)
	if newTime is less than the duration of front movie then
		set current time of front movie to newTime
	end if
	play front movie
end tell


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View movies frame-by-frame in QuickTime Player 7
Authored by: zane on Jun 17, '05 12:27:40AM
This, incidentally, also works with Sidetrack too (although I'm not sure about Apple's new scrolling trackpads).

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