DIGITAL IMAGING 1

syllabus

scanning guidelines

retouching guidelines

FRAMEGRABBING PROCEDURE

final project

et cetera

 

 

 
 





VIDEO FRAME GRABBING

can help you broaden digital still-image production by incorporating still images from the worlds of video and film. Click below to download guidelines in PDF format. For Mac, Option+Click; for PC, right click.

Download Video Framegrabbing Guidelines as PDF file

 

VIDEO FRAMEGRABBING PROCEDURES
Peter Thompson
Revised 5/16/02

 

Ask the Lab Manager to open the Video Frame Capture room. She will power the equipment. Do NOT personally power up, or touch the cables! When the computer is powered up:

• Insert your Zip disk into the Zip drive.

• Select APPLE/PREMIERE 4.2.1.

Note: if computer freezes, press Control+Command+Restart (upper right key on keyboard) and release. The computer will re-start. Launch Premiere and resume process as described above.

If Appletalk is active, a dialog box will appear.
If so, choose "Deactivate Appletalk" and a "New Project Pre-sets" dialogue box will then open. Otherwise:

• "New Project Pre-Sets" dialogue box opens.

Select "Offline Video Tape NTSC" and press OK.

• A work area will now open within Premiere. Select FILE/CAPTURE/MOVIE CAPTURE.

In the work area, place the cursor at the right corner of the work screen.

Drag diagonally down to the right to get the video input pixel size you want--640X480 is common.

• Turn to the middle VCR, lower the tape window and insert your 1/2" video. Close the window.
Press "Play".


If you do not then see the video playing on your computer:
Select MOVIE CAPTURE/VIDEO INPUT. A Video dialog box opens. Choose:
Video: Source;
Digitizer: Targa;
Input: S-video;
Format: NTSC;
Filter: VCR;
Press OK.

If you still do not see the image, call Tammy.

Otherwise:

• Play your video.

Just before you come to a part you wish to capture, click once in the "Record" box at the top of the "Source window. Without moving your cursor, click once to end the capture. Stay within a capture range of from several frames to 20 seconds for the video clip so the system is not overloaded. (Note that 640X480 X72dpi = 900K of data per video frame, which equals approximately 30 megabytes per second of video--which means that just 3 seconds of saved video will fill your Zip disk. So choose the video you will finally save to your disk wisely, sparingly).

• The video clip you have selected now opens as a "Clip" window on top of the "Source" window. At the lower left edge of the "Clip" window is a horizonal scroll bar you can use to scroll to the exact video frame you wish to save to your Zip disk.

• When you have scrolled to that frame, select FILE/EXPORT/FRAME AS PICT.

A dialogue box will open. Name your video frame, navigate to the desktop, and doubleclick on your Zip disk icon. SAVE the video frame to your Zip disk. Nothing happens for 5-10 seconds, and then the frame appears as a third window. Click the "Close" box at the top left of this third window.

• On the "Clip" (the second) window, scroll to a second frame within the clip. Choose a second or third frame, etc., as needed.

• When you have finished exporting the frames you wish to harvest from the video clip, click the "Close" box at the top left of the "Clip" window, do not save, and play your video to capture another video clip.

• Capture and Export additional frames as described above.

• When finished, select FILE/QUIT.
• Do not save any of your "Clip" windows.

• Navigate to the desktop.
• Make sure any saved frame that might be on the desktop is moved to your Zip disk.

• Remove your Zip disk.

• Remove your videotape.

• Leave the computer on.

• Close both doors and inform Tammy that you have finished.

Take your Zip disk to the Open Lab and bring up each frame within Photoshop.

 

For TA’s:

Turn on power strip.

Power up: Computer, Video monitor, middle VHS deck, Hi8 deck

On Hi8 deck: push the "TV/Video" button.

Plug external monitor into Hi8 s-video to monitor

8 gig array hooked to a ultrawise SCUZZI = capture at 30 fps, full field.

Command + Option + P+R = zap the PRAM.

In capture cable ouf of 1/2", into hi8, into capture board

SVideo blue and green cables go out to computer.