1. Advanced Streaming Format (ASF)
By Hung-Chin Wang

2. What is ASF ? An extensible file format
be composed of one or more media streams
include specification of some commonly used media types
support the transmission of “ live content ”
over a wide variety of network and protocols

3. ASF Features (1) Extensible Media Types Component Download
easy to define new media types
Component Download
Stream-specific information in the file header
Scalable Media Types
provide information for clients to interpret scalability options

4. ASF Features (2) Multiple Languages
support multiple languages
Author-specified Stream Prioritization
Bibliographic Information

5. File Format Organization(1)
ASF Object definition
the base unit of organization - ASF Object
store in little-endian byte order

6. File Format Organization(2)
High-level File Structure
three top-level objects
Header Object
Data Object
Index Object

7. File Format Organization(3)
ASF Header Object
File Properties Object
Stream Properties Object
Language List Object
Content Description Object
Maker Object
Index Parameters Object
…………

8. File Format Organization(4)
ASF Data Object
data units ( contain all multimedia data )
ASF Index Object
Example

9. File Properties Object

10. Stream Properties Object

11. Language List Object

12. Standard ASF Media Types
Audio Media Type
Video Media Type
Image Media Type
Timecode Media Type
Text Media Type
MIDI Media Type
Command Media Type
Media-Objects(Hotspot) Media Type

13. Index Parameters Object
Index Type
Nearest Data Unit
Nearest Object
Nearest Clean Point

14. ASF Data Unit Definition

15. Index Object

16. Script Command Object

17. Maker Object

18. Other ASF Header SubObjects
Component Download Object
Stream Group Object
Scalable Object
Mutual Exclusion Object
……...

19. Conclusion
如何將 media file 轉變成 asf 的檔案格式

20. Thanks
Everyone