10/13/2015 1 video data size size of uncompressed video in gigabytes image size of video 1280x720...

04/19/23

1

Video Data Size

1920x1080 1280x720 640x480 320x240 160x1201 sec 0.19 0.08 0.03 0.01 0.001 min 11.20 4.98 1.66 0.41 0.101 hour 671.85 298.60 99.53 24.88 6.22

1000 hours 671,846.40 298,598.40 99,532.80 24,883.20 6,220.80

size of uncompressed video in gigabytes

image size of video

1280x720 (1.77) 640x480 (1.33) 320x240 160x120

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2

Video Bit Rate Calculation

width pixels (160, 320, 640, 720, 1280, 1920, …)

height pixels (120, 240, 480, 485, 720, 1080, …)

depth bits (1, 4, 8, 15, 16, 24, …)

fps frames per second (5, 15, 20, 24, 30, …)

compression factor (1, 6, 24, …)

width * height * depth * fps

compression factor= bits/sec

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3

Effects of Compression

storage for 1 hour of compressed video in megabytes

1920x1080 1280x720 640x480 320x240 160x1201:1 671,846 298,598 99,533 24,883 6,2213:1 223,949 99,533 33,178 8,294 2,0746:1 111,974 49,766 16,589 4,147 1,037

25:1 26,874 11,944 3,981 995 249100:1 6,718 2,986 995 249 62

3 bytes/pixel, 30 frames/sec

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4

Be Careful...

mpeg 200:1, jpeg 24:1

analogsource

digitalrepresentation

compressedrepresentation

vs

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5

Another View

Data Rate Size/Hour• 128 Kbs 60 MB• 384 Kbs 170 MB• 1.5 Mbs 680 MB• 3.0 Mbs 1.4 GB• 6.0 Mbs 2.7 GB• 25 Mbs 11.0 GB

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Stages of a Multimedia Project

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Overview

• Stages of a multimedia project.

• Requirements for a multimedia project.

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1. Planning and costing:

• The needs of a project are analyzed by outlining its messages and objectives.

• A plan that outlines the required multimedia expertise is prepared.

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1. Planning and costing (continued):

• A graphic template, the structure, and navigational system are developed.

• A time estimate and a budget are prepared.

• A short prototype or proof-of-concept is prepared.

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2. Design and production:

• The planned tasks are performed to create a finished product.

• The product is revised, based on the continuous feedback received from the client.

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3. Testing:The program is tested to ensure that it meets the objectives of the project, works on the proposed delivery platforms, and meets the client requirements.

4. Delivery:The final project is packaged and delivered to the end user.

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Requirements for a Multimedia Project

1. Hardware:

• The most significant platforms for producing and delivering multimedia projects are Macintosh operating system and Microsoft Windows.

• These systems provide an easy-to-use graphical user interface (GUI).

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1. Hardware (continued):

• The Macintosh as well as Windows PC offers a combination of affordability, and software and hardware availability.

• The Macintosh platform is better suited for multimedia production than the Windows platform.

• The hardware platforms provided by Apple are better equipped to manage both, sound and video editing.


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2. Software:

• Multimedia software provides specific instructions to the hardware for performing tasks.

• Software tools are divided into production tools and authoring tools.


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3. Creativity and Organizational Skills:

• In a multimedia project, being creative implies knowledge of hardware and software.

• It is essential to develop an organized outline detailing the skills, time, budget, tools and resources needed for the project.


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3. Creativity and Organizational Skills (continued):

• Assets such as graphics, sound and the like should be continuously monitored throughout the project’s execution.

• A standardized file-naming procedure should be followed for precise organization and swift retrieval.


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Summary

• The basic stages of a multimedia project are planning and costing, design and production, testing and delivery.

• Knowledge of hardware and software, as well as creativity and organizational skills are essential for creating a high-quality multimedia project.

10/13/2015 1 video data size size of uncompressed video in gigabytes image size of video 1280x720...

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