Quicktime 7 pro movie to picture export fails

Question

Using quicktime 7 pro, on OS X 10.6.8, I am trying to capture a still photo from a video taken with my iphone, imported into iphoto.  If I use export, movie to picture, it will work for the first one then will give me the fail catch all... message for all others. Or, if I try to copy and then paste into my preview and use new from clipboard the images pastes as grey.
Am I missing something obvious in preferences or settings???
Thank you to the following for helping me fix the issue:
QuickTimeKirk
This helped meRe: Trying to Export movie to picture     Oct 12, 2008 10:01 PM    (in response to monkeysuncle21) 
Copy just a second of the file into a new Player window and export to image sequence.
Be sure to save to a new folder to avoid a mess of images cluttering up your screen.
iMac 3.06, Mac mini (G4 1.4), iMac G3 400, and Sony laptop using XP, Mac OS X (10.5.5), 10.3.9 OS 9.2

Answer 1

Am I missing something obvious in preferences or settings???
The QT 7 Pro "Movie to Picture" export option creates a PICT file with or without a user selected "compression" option. Unfortunately, PICT files are no longer the default Mac image format nor are they supported by all apps under Snow Leopard, Lion, or Mountain Lion. While there are several alternative options here, most users tend to rely on one of the following:
1) If you prefer working in a QT 7 Pro-like environment, open you movie clip in the free MPEG Streamclip app, locate the frame you wish to export, select the "Export Frame..." ( "Alt-Command-F" keyboard shortcut) File menu option and select your desired export settings.
2) If you prefer a quick "screen capture" work environment, open the movie clip in either the QT 7 or QT X player, locate the frame you wish to capture, press the "Command-Shift-3" keyboard shortcut to enter the screen capture mode. Once in the screen capture mode, you can
a) press the mouse to anchor one corner of an area you wish to capture and drag the mouse to a diagonal corner to select the capture area or
b) switch to the "Object Window" screen capture mode by pressing the "Space Bar" and select the "window" you wish to capture by "hovering" the mouse over the desired object.
In case "a" above, releasing the mouse captures the selected area while in case "b" clicking the mouse captures the highlighted object window. If you capture your image without honding down the "Alt/Option" key, the the captured image will include a transparent border area and drop shadow. If you hold down the "Alt/Option" key during capture, then no transparent border or drop shadow is generated. Since entire "object" window is captured using this screen capture process, I use QT X for capturing "frameles" images and use QT 7 when I want the player frame included in the captured image (with or without transparent borders/drop shadows as previously described).
3) Alternatively (under latest OS versions), you can simply open Preview and select one of the "Take Screen Snapshot" options to capture a portion, object, or entire display screen from within Preview.