600 DPI image in Quicktime

I'm working with an old program, still written with Quicktime and resources, etc. We're coming up with a problem that GWorld objects can't hold an image that large at full resolution, so we're looking for alternatives.
One of them is to use the Quartz functions for compressing and decompressing JPEG images (equivalent of fCompressImage and fDecompreessImage). Then we could keep the full image pix-map in memory and do what we need to to turn it into a GWorld at lower resolution.
However, I can't find the appropriate functions. Can anyone tell me what they are?
Thanks

When you export you can change the SIZE to reflect 16:9 or you can change the aspect ratio in the Quicktime settings once you start playing it in QT. Apple-J, I think.
CaptM

Similar Messages

Resolution of 600 DPI and Illustrator

Someone would like a small 1 inch by 1 inch logo for invoices at 600 DPI. However I understand that illustrator doesnt work in DPI or PPI since it's vector. Would I have to transfer the small image over to photoshop. I did try and save a 1 inch by 1 inch logo at 600 PPI, however when I saved the image it was no longer 1 inch by 1 inch. It had increased significantly in size regardless of what file format I saved the image as.
I would really appreciate help in this matter as Im unsure how to proceed.
Thanks

Its confusing to say the least!
Here's a universal truth that will help aleviate the confusion:
Think about this term: Pixels Per Inch.
Per Inch. You have some things (pixels). A given number of them occupy a given distance (an inch).
How do you do that? By scaling the things (pixels) so that a desired number of them fit within a given distance (inch).
Per Inch is just a scaling value. Understand and remember that universal truth, and it will clear up alot of the confusion.
Once a raster image is saved, it contains a fixed number of pixels. In order to draw a given number of the image's pixels within a measured distance, the raster image has to be scaled. Change the scale of the image, and you change the number of its pixels which occupy a measured distance.
Now be aware of these universal truths (aka facts):
Raster image file formats are different. Some formats record in the file the intended scaling value (if one is provided) that is in effect when the file is saved. Others don't.
Programs which export raster images are different. Some programs write the scaling value into the raster image file (if the raster image format supports that). Others don't.
Programs which import raster images are different. Some programs pay attention to the stored scaling value (if any). Others ignore it.
Someone would like a small 1 inch by 1 inch logo...
First issue: Is the logo square? Is the design's height equal to its width?
...for invoices...
This suggests that "someone" intends to import the raster image into some program used for invoices. That could be any of a kazillion different programs, from Word to Excel, to FileMaker Pro, to QuickBooks, to....you name it (but you didn't). You always need to know your customers' intended usage and be at least somewhat familiar with the target software's capabilities regarding importing artwork.
...at 600 DPI....
This suggests that "someone" wants a raster image with a color depth of 1-bit. That means a raster image in which each pixel can be either black or white, and nothing else. This is suggested because that is a commonly-used scale factor for 1-bit raster images that are intended for use in common programs like office applications which have very limited graphics import capability, and because it is the most common hardware resolution of most office laser printers. In other words, 1-bit raster images scaled to 600 PPI is a kind of "lowest common denominator" for commonplace office environments.
But the above suggestion is based on the assumption that "someone" knows what he/she is talking about, which is never a safe assumption. If the image is of any color depth higher than 1-bit, then 600 PPI is ridiculous. In other words, if the image file contains any pixels of any color at all, then 600 PPI is absurd for use as an invoice imprint. This is because any higher color-depth image will have to be halftone screened by the printer in order to render it with any decent-looking fidelity. That means rendering the image as a grid of variable-size dots. But the printer cannot actually print variable-size dots. It only prints fixed-size printer spots. To render variable-size halftone dots, it "fakes it" by "building them up" out of its fixed-size printer spots.
Moreover, even if the logo (the actual design) contains nothing but black and white, but you save the raster image file at a higher color-depth anyway, then 600 PPI is still just as ridiculous. Grayscale, RGB, and CMYK raster images are saved with a color depth of 8 bits per pixel per channel. When the printing device receives an 8-bit image, it is going to try to screen it (print it as halftone dots). That means that the printer will not use one printer spot for each pixel, but several. So there is no reason to provide as many image pixels as printer spots that the printing device can physically print in one inch--unless the image is not going to be rendered by halftone (or stochastic) screening (i.e.; a 1-bit image).
However I understand that illustrator doesnt work in DPI or PPI since it's vector.
But Illustrator's raster export filters do indeed work in PPI, because they are exporting raster images, which are nothing but pixels. In order to export a raster-based rendering of the vector-based artwork (which is all a raster image is), Illustrator has to write some number of pixels into the raster image file.
Your vector-based path is a mathematical description of a curve. In order to render it as a raster image file, or even to print it on a printer, or even to display it on your computer monitor as you work in Illustrator, it has to be rendered as pixels. In effect, your vector-based paths are "overlaid" onto a grid of pixels. The pixels which land inside the path are turned on. The pixels ouside the path are turned off. This is basically what occurs when a vector path is printed, when a vector path is exported to a raster image, or even on-the-fly while you view your vector paths on your monitor.
That's what vector-based paths are: Mathematical instructions to determine which squares of a raster grid to turn on.
In other words, all vector-based artwork is eventually rasterized; it's just a question of when. The scaleability advantage of vector graphics does not derive from the myth that it does not involve raster-based imaging; it derives from the fact that the rasterization is postponed until output time.
In still other words, all your vector-based artwork is going to be overlaid onto a raster grid, the squares of that grid will be colored accordingly, and that finished raster image is all anyone is ever going to see of your vector-based formulae. It's just that which grid is to be overlaid is left undetermined until the "overlay" is performed.
So when you export your vector-based artwork to a rastter-based image format, that's what you're doing: You're telling Illustrator to overlay the vector paths onto a particular raster-based grid (so many rows, so many columns of pixels, at some scale).
That's the difference between vector-based artwork and raster-based artwork: A raster image is a pre-determined rectangular grid of a fixed number of color values. A vector graphic is a set of mathematically-described shapes which can be overlaid onto any rectangular grid, so that the number of color values is dependent upon the particular grid used, be it the grid of your monitor's pixels, the grid of a printer's spots, or the grid of a raster image file that you export.
Would I have to transfer the small image over to photoshop.
No, you can export directly from Illustrator to any of several common raster formats.
I did try and save a 1 inch by 1 inch logo at 600 PPI, however when I saved the image it was no longer 1 inch by 1 inch. It had increased significantly in size regardless of what file format I saved the image as.
It "had significantly increased in size" where? When viewed in what program?
When this occurs, the raster image is simply not being scaled so that its pixels measure 1/600th of an inch. As explained above, some raster image formats do not record the scaling value. Even if the raster image file does record the intended scaling value, some programs into which you import the raster image will ignore it.
So since you can't really control whether the scaling factor is going to be ignored, to meet the stated requirements (600 PPI when scaled to 1 inch), you simply need to concern yourself with providing the correct number of pixels and it's up to the recipient's software to scale them to the desired measure.
For example, if your vector-based artwork measures 1 inch according to Illustrator's rulers, then export the raster image at 600 PPI. If your vector-baed artwork measures 2 inches according to Illustrator's rulers, then export a raster image at 300 PPI, and you'll be exporting the same number of pixels. You can either do the math, or you can simply export a raster image by specifying the desired number of pixels directly.
But do not forget to consider the question of color-depth. 600 PPI at final rendering scale is not necessary for anything other than a 1-bit image.
If the logo in question consists of nothing but a single solid color:
In Illustrator, scale it to 1 inch.
Do not color it. Use only solid black and white fills and strokes. No grayscale. No graduated fills, strokes.
Export it to a raster image format at 600 pixels (in the measured direction), with a color depth of 1-bit. You can do this by either specifying the nubmer of pixels, or by specifying the scale factor, 600 PPI. Understand, this means using a raster image format which supports 1-bit (for example, TIFF) and which the recipient's program can import. (Most common office productivity programs can import TIFF.)
When the recipient imports it into his invoice program, if it appears enlarged, it just means his program is ignoring the embedded scale factor. He can just scale it to 1" and it will then be 600 PPI.
The above scenario is common. A typical 600 SPI (printer Spots Per Inch) laser printer will turn on one of its printer spots for each black pixel in the image, thereby rendering the image as accurately as it can.
But even if the logo contains no graduated tones, and you apply some color to it (the recipient's logo spec color, for example), then you'll have to export it to a higher color depth in order to include that color. Even if you export it as grayscale, you will still be exporting 8-bit color values for each pixel. In that case, it may look fine on the recipient's monitor, but when he prints it, the printer will have to screen the image in order to render it using halftone dots which, again, are larger than actual printer spots.
The same applies, even if you use only solid black in the design but still export it to a higher color depth (grayscale, RGB, or CMYK) raster image. The recipient's printer is going to recognize the incoming raster image as 8-bits of data per pixel and assume that it has to halftone it; so again, it will not be printing one printer spot for each image pixel.
All this is why Illustrator's so-called "Save For Microsoft Office" feature is really nothing but another interface for its PNG export filter. Many AI users (mostly beginners) want to do the impossible: export their Illustrator drawings to something that ordinary office programs can import, display, and print with fidelity.
But that's really a pipe-dream. Office applications don't understand the kind of vector-based curve math which Illustrator (and all similar programs) generate. So the Save For Office interface resorts to a raster image export.
Office users don't understand the caveats and limitations of CMYK color mode, lossy JPEG compression, or color depth and don't want to have to muck with them. They just want something that they can plop into their word processing, spreadsheet, and presentation programs and have it "look good" on screen and when printed on their low-resolution office inkjets and laser printers.
Too many Illustrator users also don't want to have to think about color depth.
So the Save For Office interface defaults to RGB PNG, turns off transparency (even though PNG supports it) because some specific Microsoft Office apps before a particular version have a problem with it, and does not present the user with much in the way of other PNG-capable options (such as 1-bit grayscale).
Why am I bringing this up? To point out that Adobe's own default and explicit "recommended" export for office-type programs is an 8-bit RGB format which, again, obviates the appropriateness of 600 PPI. In RGB, 300 ppi provides more than enough pixels for the office-using recipient to scale the image to 400% without evident pixelation because even 150 PPI is higher than the screen ruling of most office printers.
So 600 PPI at the actual final on-page scale is sensible for simple office uses like ploping a black logo onto a form like an invoice that is goingto be printed in one ink (or toner) assuming 1-bit color depth; but not otherwise.
JET

LaserJet 1200 Econo Mode 300 dpi 600 dpi

I just got a new HP tower, and when I hooked up the Laserjet 1200 series printer, It's printing very dark. I went into the control panel, as I had done in the past, and it doesn't show the economode tab for the toner, it says 300 dpi, 600 dpi, I've tried both and they both seem the same, not like the old economode. Please, can you tell me what is the best way to save toner. I do a lot of printing, and LOVE the Laserjet, I actually have two of them, PS, Just got the hp p6110y tower- It's awesome.
I thank you in advance for any assistance you might offer.

Hi , I see by your post that you are unable to set the Econo mode and Print Density on the printer. I would like to help you.
Did you download and install the latest HP LaserJet Pro Series Full Solution Software and Driver? Check Devices and Printers window and let me know how the printer name is listed. Can you send me a screen shot of the printer Properties please, so I can have a look at it. You could install a separate Universal driver for printing and you should have all the available options. Then the original driver can be used for scanning, just don't delete it from the Devices and Printers window. HP Universal Print Driver for Windows PCL6 (32-bit). If you appreciate my efforts, please click the 'Thumbs up' button below. Thank You.

We have version 10.5.8 photoshop CS3 for Mac. How do we fix a problem with photoshop not resizing dpi? For example we resized a 72 dpi image to 200 dpi, when we do a pdf analysis it read as 344 dpi.

We have version 10.5.8 photoshop CS3 for Mac. How do we fix a problem with photoshop not resizing dpi? For example we resized a 72 dpi image to 200 dpi, when we do a pdf analysis it read as 344 dpi.

Sounds like it's a problem with the Acrobat settings. Did you set them to the same resolution?

PDF does not display 300 dpi images in Safari only

I have a dynamically generated PDF that contains a 300 dpi image. The image added can be one of several that the user selects. On all other browsers the pdf renders fine. On Safari only, seemingly in all modern flavors of OSx and Safari, the images begin to print and then stops printing the actual image and grey is printed in the remaining space the image would take up. To make it more fun one of the images renders fine. It is the 3rd smallest image and the 2 smaller ones do not render so it does not seem to be size related. Hoping someone here has seen this before.
This is a screenshot to use as an example:
The folding instructions graphic is also 300dpi.

Thanks Hackintosh.
It prints as it views, as a corrupt jpeg. I also dug into console and it confirmed there was an error about a corrupt jpg. The most interesting thing is if I open the bad pdf in Photoshop the whole image is there with no signs of corruption. This leads me to believe it's something with how OSx and/or Safari are rendering the jpgs. Another curious sidenote, Safari on Windows works fine but if you save the pdf, move it to a mac and open it, you get the corrupted jpg again.
I think I'm going to try and stop swimming upstream now. At the end of the day I don't care if the images are pngs, tiffs, or eps. I'm going to try feeding a few different formats and see if that doesn't fix the problem.

Hello, we are interested in more information on the Image Size Fit To option in phototshop. For example, if we open a 46x25 inch 120 dpi image and choose Fit to 4x6" does all of the resolution remain? Any links to tutorials in this area are appreciate

Hello, we are interested in more information on the Image Size > Fit To option in phototshop. For example, if we open a 46x25 inch 120 dpi image and choose Fit to 4x6" does all of the resolution remain? Any links to tutorials in this area are appreciated.

Let's look at the first thing: Aspect Ratio 46W x 25H does not fit 6W x 4H exactly. You get 6W x 3.621H If we preserve Landscape Orientation and Aspect Ratio. If I set H to 4, W will be 7.36 inches, clipping your picture.
You'll have to decide on how to clip off that 1.36 inches so your picture can be 4 x 6 in order to solve that problem.
Notice I set Resample off. Throwing out pixels is destructive editing. So what I am doing is "Scaling", changing the Print Size without touch the pixels. Notice how high the resolution goes up.
To Resample or not will be your decision. I hope I answered your questions properly. Let me know otherwise.
Gene

Vraag: Since I pointed out dont show again on the page that shows up when I want to mark text (yellow) and change the page to 600 dpi , it does not work anymore....... What did I do wrong???

Ik begin een discussie, ik scan documenten, daarvan wil ik gedeelten geel markeren. Dan komt er een box in beeld die aangeeftd at de pagina naar 600 dpi gewijzigd wordt, dat duurt even en dan kan ik markeren. Althans kon markeren, sinds ik het boxje laat niet meer zien aanvinkte werkt het niet meer. Ik vind er ook geen info over wat zeer irritant is. Opnieuw opstarten helpt niet.....
Graag bericht wat te doen :-) Wil;

iOS: Troubleshooting AirPlay and AirPlay Mirroring
http://support.apple.com/kb/TS4215
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-Airplay-Icon-Missing. htm
http://appletv2.com/airplay-icon-missing-ios-7/
 Cheers, Tom

How to generate 300 DPI image from canvas using Imagesnapshot

Hi all,
I want to generate image from my canvas.
I tried using bitmapdata and imagesnapshot.
Bitmapdata has no property called DPI.
Imagesnapshot allows to set DPI but it is not generating 300 dpi image.
Any idea?

You are in the Using iPhone forum. I will ask the hosts to move this to the iPad forum. However, I'm not aware of any setting change you can make to the cameras in the iPad or iPhone.

As increase DPI, image size is also increase in photoshop scripting ?

as increase DPI, image size is also increase in photoshop scripting can please tell me what will the reason for that?

Hi JJMACK,
I am using adobe Flex with Photoshop scripting . I am sending Flex file with parameter to generate .psd.Right now i am able to generate 72 DPI with proper image size while I am generating .psd with 250 DPI with Improper Size.
E.g
This is my flex parameters
MgrPSAction.instance.FinishLayoutToPhotoshop(curFl , savedType ,TemplateConstant.TM_LEFT,getPSDImageName(objItem,TemplateConstant.TM_LEFT_RIGHT), objItem.LayoutTMLWidth,objItem.LayoutTMLHeight ,pageDPI,returnPhotoshopHandler,
true,setWidth , setHeight,formatQty); ----- Page DPI - > like 72 or 250 paasing from here.
below is Scirpt ot resize
function openFileAndResize(xp,yp,wi,hi,imagepath)
var fileRef = new File(imagepath);
var curRefDoc = app.open(fileRef);
var curw = curRefDoc.width;
var curh = curRefDoc.height;
var resW;
var resH;
var scw = imgObj.wi/curw;
var sch = imgObj.hi/curh;
var scale ;
if(scw > sch)
scale = scw;
else
scale = sch;
resW = curw * scale;
resH = curh * scale;
if(imgObj.isAdjustImage == "true")
resW = resW * parseFloat (imgObj.scaleOrg);
resH = resH * parseFloat (imgObj.scaleOrg);
// Resize Image=======================================================
var idImgS = charIDToTypeID( "ImgS" );
var desc226 = new ActionDescriptor();
var idWdth = charIDToTypeID( "Wdth" );
var idPxl = charIDToTypeID( "#Pxl" );
desc226.putUnitDouble( idWdth, idPxl, resW);
var idHght = charIDToTypeID( "Hght" );
var idPxl = charIDToTypeID( "#Pxl" );
desc226.putUnitDouble( idHght, idPxl, resH );
var idIntr = charIDToTypeID( "Intr" );
var idIntp = charIDToTypeID( "Intp" );
var idBcbc = charIDToTypeID( "Bcbc" );
desc226.putEnumerated( idIntr, idIntp, idBcbc );
executeAction( idImgS, desc226, DialogModes.NO );
// Select Image=======================================================
var idsetd = charIDToTypeID( "setd" );
var desc263 = new ActionDescriptor();
var idnull = charIDToTypeID( "null" );
var ref138 = new ActionReference();
var idChnl = charIDToTypeID( "Chnl" );
var idfsel = charIDToTypeID( "fsel" );
ref138.putProperty( idChnl, idfsel );
desc263.putReference( idnull, ref138 );
var idT = charIDToTypeID( "T " );
var idOrdn = charIDToTypeID( "Ordn" );
var idAl = charIDToTypeID( "Al " );
desc263.putEnumerated( idT, idOrdn, idAl );
executeAction( idsetd, desc263, DialogModes.NO );
//Copy Image=======================================================
var idcopy = charIDToTypeID( "copy" );
executeAction( idcopy, undefined, DialogModes.NO );
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
//Create Temp Layer for image adjustment =======================================================
//createApplication(wi,hi,dpi,"imagelayerdoc");
createApplication(wi,hi,dpi,layerAppName);
//var curDoc = getCurDoc('imagelayerdoc');
//get Active Temp Layer for image adjustment =======================================================
var curDoc = getCurDoc(layerAppName);
app.activeDocument = curDoc;
// Past Copy image in Temp Layer for image adjustment =======================================================
var idpast = charIDToTypeID( "past" );
var desc250 = new ActionDescriptor();
var idAntA = charIDToTypeID( "AntA" );
var idAnnt = charIDToTypeID( "Annt" );
var idAnno = charIDToTypeID( "Anno" );
desc250.putEnumerated( idAntA, idAnnt, idAnno );
executeAction( idpast, desc250, DialogModes.NO );
// HERE YOU NEED TO SET XY POSTION OF IMAGE
positionLayer(app.activeDocument.activeLayer,imgObj.moveX,imgObj.moveY);
cropImage();
Please reply if have answer...
Thanks

How can you save keynote slides as high resolution (300 dpi) images?

Apparently there is a way to save powerpoint slides as 300 dpi images, with some finagling, but not the mac version. Does anyone know how to do this in keynote? Or is there a relativley easy way to do it with free/cheap software? I can increase the dpi in photoshop, but it doesn't produce crisp images for obvious reasons.

how can you save keynote slides as high resolution (300 dpi)
to save individual images from each slide in Keynote;     file > export > images > TIFF (for optimum quality)
You are using the wrong terminology to describe creating an image file
- dpi ( meaning dots per inch ) is the measurement used in printing to create the number of print dots per inch that will be deposited on to physical media like paper or film   This is done in the printer settings box of the print driver and is dependant on how the individual printer can print..
ppi ( meaning pixels per inch ) is the measurement you need to use when creating the number of pixels in a digital image file. You establish image resolution in Keynote using the inspector;
Keynote > inspector > document > slide size
I can increase the dpi in photoshop, but it doesn't produce crisp images for obvious reasons.
You can resample images in editing applications such as Photoshop or Painter but what you are doing is adding non image information to the image to increase pixel count, this is called noise. As you state this is not the procedure to use in your situation.

600 dpi pictures scanned into iPhoto

Does iPhoto accept scanned 600 dpi photos? Some seemed to disappear the next day, leaving a blank "event" square.

The event opens to a grey blank labeled "untitled event." Any ideas about finding photos that "disappear?" There are 23 of these blank events that show the same date below them when they are closed, which means these were 23 single photos I scanned a few days ago. I appreciate your help.

No image through QuickTime

Hi!
I have a Mac OS X 10.4.11 with QuickTime 7 installed. I copied film clips from a Sony EX3 (HD) to an extern harddrive. When I now want to look at the clippings it only plays the sounds. I cannot see the images. QuickTime says the computer probably needs another component but what?
Grateful for all ideas!!
/Maud

Your talking about this camera, right? http://pro.sony.com/bbsc/ssr/cat-broadcastcameras/cat-xdcam/product-PMWEX3/
If so, you will need to buy the MPEG-2 playback component from Apple to watch this video, $20.00.
http://www.apple.com/quicktime/mpeg2/
Sorry there's no way around this on a mac.

Hello All: What to thank everyone in advance for taking the time to respond to this post: We just had a 600 laptop image delopoyment of macbook pro's and since we were rushed to do this in one day-. i forgot to connect them to wireless before creating

Hello All:
What to thank everyone in advance for taking the time to respond to this post:
We just had a 600 laptop image delopoyment of macbook pro's and since we
were rushed to do this in one day…. i forgot to connect them to wireless before
creating an image. (worked from 5am ~ 5 am)
DOES ANYONE KNOW HOW TO create a login script, where to place it,
and how to push out wireless setting so when a user logs in, it would automatically
bind them to a certain wireless?
We want to strictly do this through our Mac os x server snow leopard.
Please help as I am going back this Sunday to resolve this. I will have to
manually open up 600 laptops and add them to the wireless if i don't
find out a solution.

THANKS A BUNCH!
BUT!!!
can you help me create a script with this information.
You led me to the right direction. I will be using mac os x server and doing login script.
here is what i typed up so far but i don't know how to make the file. I know the command to run throgh shell but do not know how to make the file run so when i put it in login script it will place this wireless setting on all computers.
They are ging to be using this information:
/usr/sbin/networksetup -addpreferredwirelessnetworkatindex Airport atams 0 WPA2 [F3fd+mi7yV]]
/usr/sbin/networksetup -setairportnetwork Airport atams F3fd+mi7yV
-removepreferredwirelessnetwork Airport heritage
I did this on terminal and it worked. so how can i know deploy this to all laptops that are directly plugged in.

Is there a way to export still images from Quicktime or do I need Quicktime Pro (and is Quicktime Pro even still a thing?)

I'm sure there used to be an option "export to still image" but not any more.
Do I need to switch to Quicktime Pro? I used to have it back in my P.C. days but I'm not sure if Quicktime Pro is even a thing any more.
I don't want to go down the "screen grab" option because my source footage is larger than the screen size and so I want to do my cropping after I've exported the stills, not before.

I played a little with live trace in CS5. Seems to do quite a good job if I had the right contrast between the blood (white stuff) and the myocardium (the dark circular wall surrounding the white round area). Picture one is the contrasted picture taken off a dicom medium (these media allow adjusting the contrast very well). Left ventricle is the smiley face on the right of image. The right ventricle is on the left, kind of D shaped. The second picture is the live trace image (with "make and expand" selection). I selected the image with the "direct selection tool (A)", then used the live trace with make and expand. The tracing can not be seen here, but it is very accurate.
The third image is the same MRI image as in picture one without contrast adjustment. Live trace did bad - fourth picture.

Squeezed Image in QuickTime from FCP

Although I've come close to finding my specific issue when perusing the discussions, I haven't had much success.
I shot in 16:9 on the XL2. I changed all my settings in FCP before logging and capturing to accommodate this. It looks fine in FCP, including in the Canvas. When I export to QuckTime however, the image is squeezed to fit a 4:3 aspect ratio (meaning, it's in 4:3, with the image pushed in on the sides and everything is stretched vertically). I tried different settings in the export window ("Current Settings", "DV NTSC Anamophic", etc.), but it always comes out the same in the end. Any ideas?
Thanks!
Power Mac G5 (dual Proc.) Mac OS X (10.3.9)

When you export you can change the SIZE to reflect 16:9 or you can change the aspect ratio in the Quicktime settings once you start playing it in QT. Apple-J, I think.
CaptM

600 DPI image in Quicktime

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