Displaying 20 results from an estimated 2000 matches similar to: "WMT?"
2002 Aug 06
1
VP3 Patch For xine
Hi,
Since a number of people are eager to try out the native VP3
decoder in xine, I have made a patch available, bz2-compressed:
http://www.pcisys.net/~melanson/codecs/xine-vp3-decoder-patch.bz2
To work with this patch:
1) Get the latest xine-lib from CVS. Visit this page for more details:
http://sourceforge.net/cvs/?group_id=9655
The module name is xine-lib, but you will also need
2003 Mar 09
4
Proof of Concept
Hi,
So it took a little while to get here but VP3 through ffmpeg is
finally starting to achieve viewable results. It partially works right
now. Keyframes only. And monochrome. Oh, and the picture is upside down
(something I did not realize about VP3 until I let it fly just now).
Anyway, here is a picture of ffmpeg's VP3 decoder in action using xine:
2003 May 28
2
autoconf problem
./configure: line 524: syntax error near unexpected token `AM_INIT_AUTOMAKE(libtheora,0.0)'
./configure: line 524: `AM_INIT_AUTOMAKE(libtheora,0.0)'
I'm sure I'm doing something pro-stupid, but ---
my setup works fine for ogg & vorbis.
autoconf ver 2.13
automake (GNU automake) 1.4-p4 if that matters
hey let's put tool version numbers into the README
-dan
2003 Jun 14
6
dead DCSearchPoints code
Dan,
In reviewing the code, derf came across the DCSearchPoints array in
QuadCodeDisplayFragments(), encode.c:696. It looks like it specifies a
search order for nearby coded fragments for prediction if there isn't a
nearest neighbor. However, the upper search bound is defined as *0*, so
the search loop (line 917) is never executed and it always falls back
to the last coded fragment.
2002 Aug 05
3
Cross-Compiling VP3 lib on Linux
Hi,
I have been working with VP3 for some time now. Dan Miller from
On2 just told me about this list.
A few months ago, I managed to get On2's VP3 source snapshot to
compile under Linux, a feat that many have apparently attempted and
quickly abandoned. I compiled a small console app and the results of the
experiment are explained here:
2003 May 07
2
VP30
Hi,
Can anyone tell me the significant differences between VP30 and
VP31 (or are you allowed to)? Are there different token and quantizer
tables? Are there algorithmic differences? I have a VP30-encoded file that
plays with the VP3 VfW DLL but not with the open source decoder.
Thanks...
--
-Mike Melanson
--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project
2003 Oct 09
4
Updated VP3 Document
Hi,
I have been on a documentation kick recently. I finally updated my
VP3 format document tonight:
http://www.pcisys.net/~melanson/codecs/vp3-format.txt
v0.2: October 9, 2003
- expanded section "Reversing the DC Prediction"
- added Appendix B: Theora Differences
Feel free to look it over and point out any glaring mistakes. I can't wait
to see how much sense it makes to
2004 Mar 02
1
VP3 Format Doc, v0.4
Hi,
Check it out-- another update in the space of a week:
http://home.pcisys.net/~melanson/codecs/vp3-format.txt
v0.4: March 2, 2004
- renamed and expanded section "Initializing The Quantization Matrices"
- outlined section "Reconstructing The Frame"
- moved Theora Differences Appendix to its own section entitled "Theora
Specification"
- added Appendix:
2003 Feb 23
6
More Missing Pieces
Hi,
I am making good progress on understanding, documenting, and
re-implementing VP3. I have found some more deadwood in the decoder code
and I just wanted to verify that it really has no place:
* Version 3.3 tables: There are 2 sets of VLCs: One for v3.1 and one for
v3.3. The v3.1 set is always selected. Are the v3.3 tables in production,
or will they ever be?
* DC Search Points: VP3
2003 Feb 26
7
[OT] Just saying hi!
I hope this list is small enough for not beeing banned when
introducing oneself. So...
Hi,
I just subscribed to the theora-lists. I'm from the XVID project,
so I know a deal about video and MPEG-4 in particular, but nothing about
Vorbis/Theora etc., That's why I'm here, because I'm interested in
patent-free alternatives.
I guess there is no documentation of the current status
2003 Mar 05
5
VP3 IDCT
Hi,
Is there anything special I need to know about VP3's IDCT? I mean
besides the fact that there are separate IDCTs to handle sparse
coefficient matrices. Are the IDCT functions mathematically equivalent to
any textbook IDCT functions?
Thanks...
--
-Mike Melanson
--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To
2003 May 28
2
encoder discrepancy
the files produced by windows compile vs. Linux are indeed significantly different in size (about 140K vs. 160) However I'm not convinced all the default parameters are set the same way in the two example files. This needs to be verified to see if there really is a bug, or can the two versions produce byte-equal output streams?
<p> ___ Dan Miller
(++,) Founder, On2 Technologies
2004 Jul 11
17
Independent implementations?
Hullo,
When people ask me what Vorbis's license terms are, I usually tell
them that the bitstream format is in the public domain, that the
reference libraries are licensed under a BSD-like license, and that
the example programs are licensed under the GNU GPL. (Note the
distinction between filespec and implementation here.)
Meanwhile, Theora.org's FAQ doesn't say anything about the
2003 May 04
0
VP3 In ffmpeg
Hi,
Sorry for taking so long with this, but I finally committed a
first pass of my own VP3 decoder to the ffmpeg codebase. You can browse
the source here:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/ffmpeg/ffmpeg/libavcodec/
vp3.c and vp3data.h are the files in question. Attached is a message I
sent to the ffmpeg-devel list about the new decoder and its present
shortcomings.
2004 Mar 24
1
Built of theora.dsw
Hello everybody,
I'm a new member of this mailing-list. My name is Remi
BEAUDOUIN, I'm student in an engeneering school in France
(ENSEIRB, Bordeaux), major Data and Image Processing. I'm
currently doing my last internship before graduating in
Thales Airborne Systems.
I'm working on video compression and I have to choose the
best way to encode and to embed it on a DSP TMS320DM642
2003 Feb 19
4
Block Coding Pattern
Hi,
There seem to be 2 sets of block coding patterns in the
VP3x/Theora algorithm. Based on the comments in the code, the first
pattern is used if encoder version < 6 and the second pattern is used in
encoder version >= 6. None of the code to support the second pattern is
ever called. Is there an encoder with a version >= 6?
The code in question is
2004 Feb 01
2
Where's TrueCast5?
Supposedly On2 transferred their Video Recorder and TrueCast5 streaming server into opensource along with VP3. Theora is obviously the VP3 project, and while I can find nothing on Xiph about it, the recorder source is offered on vp3.com; but I can find nothing on Xiph or vp3.com about what happened to Truecast5. I contacted On2 about whether TrueCast5 was really going to be open source, and they
2004 Apr 26
1
Specifications
Hello,
I am a student who wants to study the VP3 encoding/decoding process in
detail. I downloaded the source code from your site. I was wondering if
there is any supporting document which provides details of the entire
process - a complete VP3 standards document to aid in the understanding
of the code. Any information will be welcome.
Thanks
Regards,
Navneet
--- >8 ----
List archives:
2003 Jun 17
2
theora spec
can anyone confirm that, unlike VP3, Theora in fact decodes images right-side-up? (VP3 managed to turn everything upside down on encode and reverse it on decode)
The tests I'm doing indicate that Theora doesn't reverse the image -- the first coefficients encoded correspond to the upper-left corner of the frame.
___ Dan Miller
(++,) Founder, On2 Technologies
--- >8 ----
List
2003 Jan 29
0
VP3 for xine 1.0-beta4
Hi,
Some of you may recall that I got the VP3 decoder working with the
xine multimedia player some time ago and posted a patch for anyone else
to try. I really messed up when I did that since I generated the patch
against some random CVS snapshot of xine-lib. I did better this time and
generated the patch against the latest release of xine-lib (1.0-beta4,
released today).
If you