#9
Det er forkert at sige ogg er til lyd.. OGG er et container format som så bliver brugt af forskellige projekter til at containe deres codec. Det er så rigtigt at et af disse projekter er vorbis som encoder lyd. Men theora som encoder video bruger også ogg formatet.
http://www.ietf.org[...]
citat fra rfc:
Requirements for a generic encapsulation format
The design idea behind Ogg was to provide a generic, linear media
transport format to enable both file-based storage and stream-based
transmission of one or several interleaved media streams independent
of the encoding format of the media data. Such an encapsulation
format needs to provide:
o framing for logical bitstreams.
o interleaving of different logical bitstreams.
o detection of corruption.
o recapture after a parsing error.
o position landmarks for direct random access of arbitrary positions
in the bitstream.
o streaming capability (i.e., no seeking is needed to build a 100%
complete bitstream).
o small overhead (i.e., use no more than approximately 1-2% of
bitstream bandwidth for packet boundary marking, high-level
framing, sync and seeking).
o simplicity to enable fast parsing.
o simple concatenation mechanism of several physical bitstreams.
All of these design considerations have been taken into consideration
for Ogg. Ogg supports framing and interleaving of logical
bitstreams, seeking landmarks, detection of corruption, and stream
resynchronisation after a parsing error with no more than
approximately 1-2% overhead. It is a generic framework to perform
encapsulation of time-continuous bitstreams. It does not know any
specifics about the codec data that it encapsulates and is thus
independent of any media codec.
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