Re: Image Sequences-why not suitable?

[Aidan G. <wgs...@no...>]

James Wilson wrote:
> I wonder, why are still image sequences, such as JPEGs, not suitable for real world use? I want video support as much as anyone, but for now, aren't JPEG sequences fine? Is the problem with the fact that audio can't be streamed directly with it? It's standard practice to stream the audio from a seperate file in games, anyway...Or is it becouse JPEG sequences are somewhat larger then Ogg Theora? That's not much of an issue when you've got DVD-ROMs to work with....

To answer your question simply, because decompression time is crippling.  To 
give a little more detail, video codecs are designed for moving pictures, so 
they can take into consideration similarities between consecutive frames when 
encoding, which JPEG can not do, as it only deals with still images.

That said, still-image sequences are fine for short, low-res animations like 
the spinning wheel in the Pipmak demo.

  --Aidan