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Part A Multimedia Production

Part A Multimedia Production. Rico Yu. Part A Multimedia Production. Ch.1 Text Ch.2 Graphics Ch.3 Sound Ch.4 Animations Ch.5 Video. Video. Properties of Video Video Sources Size of Video file Compression of video Video Streaming. 1. Properties of Video. Full motion of recording

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Part A Multimedia Production

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  1. Part A Multimedia Production Rico Yu

  2. Part A Multimedia Production • Ch.1 Text • Ch.2 Graphics • Ch.3 Sound • Ch.4 Animations • Ch.5 Video

  3. Video • Properties of Video • Video Sources • Size of Video file • Compression of video • Video Streaming

  4. 1. Properties of Video • Full motion of recording • Video player is needed • Video vs Animation • Quality of Video

  5. Video vs Animation • Video • Continuous motion breaks up into still pictures • Animation • Still pictures combined to become a movie

  6. Quality of Video

  7. 2. Video Sources • Digital • From digital video camera (DV camcorder) and web cam. • Analogue • From TV, Video Cassette Recorder (VCR) and analogue camcorder

  8. 2. Video Sources • Video capture card • Digital • IEEE1394 or USB • Analogue • Composite cable (RWY)

  9. 3. Size of Video file File size (uncompressed) = Image size x color depth in bit x Frame rate x Duration / 8 bytes

  10. 3. Size of Video file • e.g. a 1 minute adv. recorded in 320 x 240 pixels, 24-bit color and 30 fps would have an uncompressed file size at least = 320 x 240 x 24 x 30 x 60 /8 = 4.1472 x 108B = 395.5MB

  11. 4. Compression of Video • Reasons for compression • reduce file size • enable live broadcast on Internet • Moving Picture Expert Groups (MPEG) • Compression and Decompression (CODEC)

  12. CODEC

  13. 5. Video Streaming • Start displaying the data before entire file has been transmitted. • CODEC: MPEG-4 • e.g. ASF, WMV, RM • Can only view, can’t store

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