[vorbis-dev] New Directshow filters preview...

[Ralph Giles]

On Tue, Mar 23, 2004 at 01:48:02PM +0800, illiminable wrote:

> The streaming is a slightly different issue... most directshow filters are
> implemented as transform filters and allow directshow to supply the source
> filter... there are several limitations to doing this, and this
> implementation imlpemnts the demuxer as a source filter for various reasons.
> This does however mean that i have to write the network support myself
> rather than leveraging the existing URL source filter. This was a conscious
> decision as a beleive the benefits of havin the demux as a source outweigh
> the small amount of work i will need to include network code.

Does DirectShow not have support for a separate demux plugin between the 
source and decoders? (I don't know anything about it) Seems like taking 
advantage of the graph would make your plugins more flexible in the 
future.

I bring it up because a real problem we have with the vorbis quicktime 
plugin (qtcomponents.sf.net) is that it embeds the Ogg mux directly. 
So while it can read and write Ogg Vorbis, you can't include Vorbis 
audio in a .mov file. So we have a perverse situation where you can 
export a quicktime movie using the now-free VP3 codec (which could be 
losslessly transcoded to OggTheora) but you *have* to use one of Apple's 
proprietary audio codecs.

FWIW,
 -r
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