[X3D-Public] Video Codec

[Len Bullard]

So far, as a heavy audio node user, the current situation with the X3D
browsers for audio meets my needs.

Vendors license what works.  A minimum set is a nice to have.  So far,
whatever the licensing costs are, the vendors are paying them.  The reason
for a no-cost baked into the standard requirement is to have a guarantee of
interop where needed.  As it stands, authors have what they need.  Where
else do the guarantees for interop apply or is this a part of the standard
that preserves the status or claim that ANYONE can build a minimally
compliant browser without encumbrance?

len

-----Original Message-----
From: x3d-public-bounces at web3d.org [mailto:x3d-public-bounces at web3d.org] On
Behalf Of Joe D Williams
Sent: Thursday, May 07, 2009 7:02 PM
To: x3d-public at web3d.org
Subject: [X3D-Public] Video Codec

Hi All,

from:
http://www.w3.org/TR/html5/video.html#video


"4.8.7.1 Video and audio codecs for video elements

"User agents may support any video and audio codecs and container
formats."

In Red box editorial note:
"It would be helpful for interoperability if all browsers could 
support the same codecs. However, there are no known codecs that 
satisfy all the current players: we need a codec that is known to not 
require per-unit or per-distributor licensing, that is compatible with 
the open source development model, that is of sufficient quality as to 
be usable, and that is not an additional submarine patent risk for 
large companies. This is an ongoing issue and this section will be 
updated once more information is available."

In X3D there is X3DSoundSourceNode:

from
http://www.web3d.org/x3d/specifications/ISO-IEC-19775-1.2-X3D-AbstractSpecif
ication/Part01/components/texturing.html#MovieTexture

" ... shall support MPEG1-Systems (audio and video) or MPEG1-Video 
(video-only) movie file formats as defined in ISO/IEC 11172-1. Details 
on the url field can be found in 9.2.1 URLs.

and

http://www.web3d.org/x3d/specifications/ISO-IEC-19775-1.2-X3D-AbstractSpecif
ication/Part01/components/sound.html#AudioClip

 " ... shall support at least the wavefile format in uncompressed PCM 
format (see [WAV]). It is recommended that browsers also support the 
MIDI file type 1 sound format (see 2.[MIDI]) and the MP3 compressed 
format (see 2.[I11172-1]). MIDI files are presumed to use the General 
MIDI patch set. 9.2.1 URLs contains details on the url field."



my comment:
So, it looks like X3D minimum requirement is
18.4.2 MovieTexture
MPEG1 for video and audio
and
16.4.1 AudioClip
wavefile uncompressed PCM, MIDIt1/gp, and MP3 uncompressed

I think it would really great for the 3D community to stand with the 
(X)HTML folks about this.
If I understand the problem:
First, do the X3D 'shall support' requirements meet the html 5 group's 
wishes?

If not, I think this (at least somewhat implied  W3C) goal of a 
quality, unencumbered, 'native' even, and freely available video 
authoring and delivery essential should line right up with what is 
needed in X3D.

Thanks and Best Regards,
Joe



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