Hamilton College Digital Collections


Table: Specifications for Digitizing Photographs (black and white, grayscale and color)
Use File Format Frame Size Frame Rate Compression Audio Editing/ Processing Storage

Archival
Original
(AO)

Long-term archiving

raw AVI;
MiniDV/DVCam;

MPEG-2/DVD

720 x 480 pixels (hi-res, full screen)

640 x 480 pixels (low-res, full screen)

30

None

stereo

none

Stored on 2 media: Digibeta Tape, epternal spinning disk (not CDs or DVDs due to large size of video files)

Working
Master
(WM)

Creating derivatives

-Reduce artifacts and flaws
-Correct hue, contrast and brightness.

If kept, same as AO.

Delivery File

Internet - broadband

MPEG-2/DVD
MPEG-4

QuickTime (Sorenson codec) (.qt, .mov)
Ogg Theora

320 x 240 pixels;

15

High

22 kHz, 16-bit stereo;

mono

-Frame rate reduced
-Frame size reduced

-Compressed
-Broken up into multiple segmeets

Spinning disk and backup tape
DVD (MPEG-2 videos under 2.5 hours)

Internet -
56K dial-up

RealMedia (ReadAudio + RealVideo) (.rv)

160 x 120 pixels

3-6

Very High

mono

-Dimensions reduced further
-Broken up into multiple segments

Thumbnail
Image

for clicking

GIF or
JPEG (low quality: 3-4)

No larger than 160 (w) x 120 (h) pixels

N/A

High
(JPEG low quality: 3)

N/A

(Updated: May 6, 2008, December 17, 2010, pjm)