preserving
materials
what are
materials?
audiovisual
are surrogate
history
2’’ Quad (1956)
TCR 100 Quad (1969)
UV 340 (1964)
Panasonic video cartridge (1969)
Philips video recorder (1970)
U-Matic(1971)
V-Cord (1972)
Betamax(1975)
VHS (1976)
D-2 (1988)Hi8 (1989)
Digital betacam(1993)
Digital –S (1995)
-2 (1988)
Hi8 (1989)Digital betacam(1993)
-2 (1988)
1992
-2 (1988)
1997 : RM
-2 (1988) VOBASF
2001- present
OCGMP4
FLVMOV
MKV3GP
indigital
signal recording of a signal onto a carrier
digitization digital preservation of the digitized signal
via
you
computer
playback device video cassette recorder
LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) i...
LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) i...
LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) i...
LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) i...
LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) i...
properties
resolution-number of pixels present in the images of the video-determines whether your video is standard definition or hig...
size-pixel dimension of the frame
aspect ratio-Ratio of width to height
frame rates
-speed at which the frames are captured and intended for playback
bit rate-or data rate-amount of data used to describe the video portion of the file
bit rate-typically measured in per second units then in KB,MB,GB-higher bit rate, better quality (in general)
codec
properties
sampling rate-how often the audio is sampled when convertedfrom analog to digital
number of channelsEither coming from single (mono) or multiple channels (stereo)
codec
what is a
container VS
codec
Describes structure of the file
Short for coder/decoder
Compressor or decompressor
-Way of encoding video
into a stream of bytes
-Chief determinatorof...
… Container as the file itself. Codec as its contents. Impt. to realize: -most good container formats can hold many codecs
Describe both!
Example:
MOV file containing H.264 data
Problem: Common use of terms Confusion and imprecision
Even more confusing:
-both describes codec and container
Example:
“mpeg-4”
Windows media video
-can be streamed across the internet
-when WM server: viewed before entire file
-windows media play...
Audio video interleave
-Windows Player (ex. WMP)
-uncompressed: high quality video
-internet: entire file must be downl...
Apple QuicktimeMovie-Apple QuicktimeMovie Player-viewed before entire file-streamed across internet-depends on compression
Motion Picture Experts Group
-provide VHS quality movies or better
-MPEG player
-entire file must be downloaded
-
Mpeg1 = VHS
Mpeg2better than VHS; used for DVD
Mpeg4best quality
Real Media
-RealPlayer
-viewed before the file
-high compression but at a cost to quality
-makes a file smaller
-decoded file is unaltered after decompression has taken place
-by using a scheme known as “run le...
Example: -Animation codec (which is typically used for archiving or transferring files), have a low compression ratio-Usua...
-you lose some image, video, or audio information. -bit tricky because good lossycompression is a balancing act between qu...
-Lossycompression schemes like H.264 (used on Canon video DSLRs) can have compression ratios of more than 100:1. -With vid...
Preserving Audiovisual Materials (LIS 198-Digital Preservation)
Preserving Audiovisual Materials (LIS 198-Digital Preservation)
Preserving Audiovisual Materials (LIS 198-Digital Preservation)
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Preserving Audiovisual Materials (LIS 198-Digital Preservation)

A presentation on the digital preservation of audiovisual materials, including a brief history of media formats and file types, among others. It's a bit of a rushed work, I admit, plus the text designs are not as smooth as before I converted the PPT to PDF format.
Published on: Mar 4, 2016
Published in: Technology      
Source: www.slideshare.net


Transcripts - Preserving Audiovisual Materials (LIS 198-Digital Preservation)

  • 1. preserving materials
  • 2. what are materials?
  • 3. audiovisual are surrogate
  • 4. history
  • 5. 2’’ Quad (1956) TCR 100 Quad (1969) UV 340 (1964)
  • 6. Panasonic video cartridge (1969) Philips video recorder (1970) U-Matic(1971)
  • 7. V-Cord (1972) Betamax(1975) VHS (1976)
  • 8. D-2 (1988)Hi8 (1989) Digital betacam(1993)
  • 9. Digital –S (1995)
  • 10. -2 (1988) Hi8 (1989)Digital betacam(1993)
  • 11. -2 (1988) 1992
  • 12. -2 (1988) 1997 : RM
  • 13. -2 (1988) VOBASF
  • 14. 2001- present OCGMP4 FLVMOV MKV3GP
  • 15. indigital
  • 16. signal recording of a signal onto a carrier
  • 17. digitization digital preservation of the digitized signal
  • 18. via
  • 19. you
  • 20. computer playback device video cassette recorder
  • 21. LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) is a similar capture device.
  • 22. LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) is a similar capture device.
  • 23. LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) is a similar capture device.
  • 24. LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) is a similar capture device.
  • 25. LEFT: The Avid Dazzle Video Creator Plus HD ($89/P4500) captures video. RIGHT: Pinnacle’s Studio MovieBoxHD ($100/P5000) is a similar capture device.
  • 26. properties
  • 27. resolution-number of pixels present in the images of the video-determines whether your video is standard definition or high def.
  • 28. size-pixel dimension of the frame
  • 29. aspect ratio-Ratio of width to height
  • 30. frame rates -speed at which the frames are captured and intended for playback
  • 31. bit rate-or data rate-amount of data used to describe the video portion of the file
  • 32. bit rate-typically measured in per second units then in KB,MB,GB-higher bit rate, better quality (in general)
  • 33. codec
  • 34. properties
  • 35. sampling rate-how often the audio is sampled when convertedfrom analog to digital
  • 36. number of channelsEither coming from single (mono) or multiple channels (stereo)
  • 37. codec
  • 38. what is a
  • 39. container VS codec
  • 40. Describes structure of the file
  • 41. Short for coder/decoder Compressor or decompressor -Way of encoding video into a stream of bytes -Chief determinatorof quality
  • 42. … Container as the file itself. Codec as its contents. Impt. to realize: -most good container formats can hold many codecs
  • 43. Describe both! Example: MOV file containing H.264 data
  • 44. Problem: Common use of terms Confusion and imprecision
  • 45. Even more confusing: -both describes codec and container Example: “mpeg-4”
  • 46. Windows media video -can be streamed across the internet -when WM server: viewed before entire file -windows media player -internet streaming server
  • 47. Audio video interleave -Windows Player (ex. WMP) -uncompressed: high quality video -internet: entire file must be downloaded -stored on local hard disk or CDROM
  • 48. Apple QuicktimeMovie-Apple QuicktimeMovie Player-viewed before entire file-streamed across internet-depends on compression
  • 49. Motion Picture Experts Group -provide VHS quality movies or better -MPEG player -entire file must be downloaded
  • 50. - Mpeg1 = VHS Mpeg2better than VHS; used for DVD Mpeg4best quality
  • 51. Real Media -RealPlayer -viewed before the file -high compression but at a cost to quality
  • 52. -makes a file smaller -decoded file is unaltered after decompression has taken place -by using a scheme known as “run length encoding”
  • 53. Example: -Animation codec (which is typically used for archiving or transferring files), have a low compression ratio-Usually, it’s no more than 2:1.
  • 54. -you lose some image, video, or audio information. -bit tricky because good lossycompression is a balancing act between quality, data rate/file size, colordepth, and fluid motion-Almost every video compression scheme is lossy
  • 55. -Lossycompression schemes like H.264 (used on Canon video DSLRs) can have compression ratios of more than 100:1. -With video workflows, compression can be applied (or removed) at several stages.

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