[theora-dev] Using the VP3 ENCODER in a DIRECTSHOW GRAPH wit defined quality and BANDWIDTH - HOW?

[Daniel B. Miller]

hi Thomas --

> Let us start with soeme questions:
> (a) Is there a lib with associated header file that I can then use to
> link into the codec, or do I have to rebuild the codec here completly
> myself? I would prefer to be able to create the filter dll without
> having to go through the complete build process.

I think it's in your interest to build the libs yourself.  There are no
'official' libraries; the source code is what you have to start with if
you don't want to use the DLL's.  If you have build problems, please let
me know.  Once you are set up correctly (MSVC, service pak 4, intel
headers etc) it should be very straightforward to build the libraries.

> (b) Is there a FourCC code allocated for the encoded video stream?
> Basically, what would the FourCC code be if you would use the codec to
> encode video for an AVI file? I need this information for the generation
> of the correct video subtypes :-)

The fourCC for Vp3 is "VP31".

> (c) Can you name me a header file that includes the definitions of the
> configuration functions the codec has, so that I can create a COM
> interface for this.

The easiest way would be to start with vp31vfw.cpp & .h.  These functions
are called by the VFW interface, and are reasonably comprehensible.

Please don't take this the wrong way, but I need to be clear that it is
not possible for me to make any promises about supporting your task.  If
you think you're up to it, great. Our priority needs to stay focused on
improving the core technology and bringing it into the world.  Perhaps
others on this list will jump in and help.

Best of luck --
>
> Thanks
>
> Thomas
>
>
> -----Original Message-----
> From: Daniel B. Miller [mailto:dan at on2.com]
> Sent: Donnerstag, 22. August 2002 15:00
> To: theora-dev at xiph.org
> Cc: owner-theora-dev at xiph.org
> Subject: RE: [theora-dev] Using the VP3 ENCODER in a DIRECTSHOW GRAPH
> wit defined quality and BANDWIDTH - HOW?
>
>
> hi thomas --
>
> On Thu, 22 Aug 2002, Thomas Tomiczek wrote:
>
> > David, inline prefixed with *** - sorry, we have Outlook XP and
> > Exchange server as corporate stnadard, and inserting the ">"'s is not
> > something I found it capable to do.
>
> No problem -- but it's Dan!  Anyway I'm supposed to switch to Outlook
> soon, not looking forward to it.
> >
> > *** Our resources in this field are limited to - I would not exactly
> > have problems coming up with a base filter infrastructure (means that
> > is work for less than an hour), but I dont feel comfortable trying to
> > understand the codec without documentation et al. While I do a lot of
> > C++ development, it is pretty limited in scope - I sort of had enough
> > problems trying to get the codec to compile at all. If you would be
> > able (or if anyone in the fielf knowledgable with the working of the
> > codec) would be able to actually "hand hold" me when it comes to using
>
> > the codec, I would gladly handle the rest of the work, i.e. developing
>
> > the whole DirectShow encidong part.
>
> I will do my best to help.  I cannot make any blanket promises, but a
> working DSHOW filter would be a good thing.  In many ways it's a more
> powerful interface than VFW.  I suspect there are other developers out
> ther who could use it -- if you're lurking, now would be a good time to
> make your presence known.
>
> We did have a playback-only dshow component at one time.  I will check
> to see if it's still available, and what it would take to make it
> current.
> >
> > datarate for 11 kbyte/sec.  This will save the key into the registry
> > with these settings.  The key is under HKEY_LOCAL_MACHINE/SOFTWARE/On2
>
> > Technologies (or something very similar).
> >
> > *** Name an app :-) I tried it in DirectShow, and it fails to open any
>
> > dialog.
>
> Try VirtualDub (www.virtualdub.org)
> >
> > *** Again, with support in handling the filter (I can ask you detailed
>
> > questions when it comes so far) by someone knowing what he does there,
>
> > I am willing to donate all the work to create a full blown directshow
> > filter :-) Note my ressentiments - I have some bad experience with bad
>
> > open source software in the past, and I definitly dont want to spend
> > weeks trying to understand the filter works itself.
>
> I hope you decide to go for it.  I'll do my best to assist you, within
> reason.
>
> >
> > Thomas
> > --- >8 ----
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> >
>  ___  Dan Miller
> (++,) CTO and founder, On2 Technologies
>
>
>
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