Dynamic Video Encoding

Week 3

Daniel Ayoub Kush Oza

Anatomy of a Video File

Codec

• Container
• Defined by file extension
• Holds various audio/video streams
• Specifies contained encoding scheme
• Encoding scheme defines algorithm(s) used to encode/decode video
• Content stream
• Contains encoded audio/video streams
• Limits video use to only specific codecs

• Encoder-decoder
• Software/hardware
• Algorithms defined in compression standard
• Can sometimes encode/decode several compression algorithms
• Popular compression algorithms include JPEG/MPEG family

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H.264 Compression Algorithm

• Defined in MPEG-4 Part 10: Advanced Video Coding
• Implements many common image/video compression techniques
• Discrete Cosine Transform (DCT)
• Motion Compensation

Scalable Video Coding

• Uses various methods to split a high quality bitstream into component layers
• Temporal Scalability
• Spatial Scalability
• SNR Scalability
• Decoder recombines selected layers to form output video stream

http://ip.hhi.de/imagecom_G1/assets/pdfs/Overview_SVC_IEEE07.pdf

Programming

• Learning Ruby
• Codecademy
• Similar to Python, object-oriented
• VLC (VideoLan Client) Streaming Protocol
• http://images.videolan.org/doc/streaming-howto/en/streaming-howto-en.pdf
• ORBIT tutorials

Questions?