Theora is a challenging project of Xiph.Org to create a hi-quality, license free video codec, based on ON2 VP3

theora streamer for Android anyone?

ola,

i am one of the developers of http://giss.tv,
some people here might know about it.

we use since 5 years some tools
( gstreamer, ffmpeg2theora, pure data, ... )
to make Ogg/Theora/Vorbis
streams related to media-hacktivism
and social movements.

lately, we realized how important it becomes to
have lighter tools in some contexts where you cannot set
a medialab and a decent network,
like in pacific occupation of public spaces
( plaza catalunya, puerta del sol, ... ).

that's why we are trying now to develop
some streaming solutions for mobile phones
and, logically, we try right now to make this work
on Android.

i compiled libogg, libvorbis and libtheora for ARM
and linked it to the Java interface using JNI...
but alas, no luck, it crashes in various places
of the native code, so i guess i need a proper port of the libraries
to Android ( that should work on ARM processors
with fixed point processing no ? ).

i'm writing now this message to know

(Continue reading)

headers

j | 31 Jul 18:28

ffmpeg2theora 0.28 released

ffmpeg2theora 0.28 - http://v2v.cc/~j/ffmpeg2theora/

Some changes that went into this release:
 - select resize method via commandline
 - fix 5.1 channel ordering
 - update to FFmpeg 0.7 branch
 - additional bug fixes

Source:
 http://v2v.cc/~j/ffmpeg2theora/downloads/ffmpeg2theora-0.28.tar.bz2
 svn co https://svn.xiph.org/tags/ffmpeg2theora/ffmpeg2theora-0.28

Binaries:
 Linux 32bit
     http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.linux32.bin
 Linux 64bit
     http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.linux64.bin
 Mac OS X
     http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.pkg
 Windows
     http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.exe
_______________________________________________
theora-dev mailing list
theora-dev <at> xiph.org
http://lists.xiph.org/mailman/listinfo/theora-dev

headers

Ralph Giles | 27 May 01:01

media.xiph.org y4m rearrangement

All,

Just to let you know, we've flattened the file hierarchy in Tim's
(derf's) collection of y4m-format test clips. Previously, the HD
content was sorted into separate directories. Now it's all in the same
directory as the SD and CIF-resolution files.

If you have a mirror, you can save yourself some bandwidth by manually
moving everything up a level: 'cd y4m; mv *p/* .' before rsyncing
again.

If you don't have a mirror and would like one, the archive is
available over anonymous rsync:

rsync rsync://media.xiph.org/y4m/  # for a file listing
rsync -a --progress rsync://media.xiph.org/y4m/ y4m/ # for a complete copy

If you're using test scripts which assume the old layout, they will
need updating.

 -r

--

-- 
Ralph Giles
Xiph.org Foundation for open multimedia

headers

David Schueler | 23 May 12:02

[Cortado] How to support seeking in on-the-fly generated Theora stream?

Hello all!

i want to use Theora in a little video portal, because its free and open 
source and i want to contribute some code to get the Java Theora player 
(Cortado) more feature-rich.
But now I'm stuck and hope that someone can point me into the right 
direction.

I have videos stored in several formats (mostly H.264 or MPEG4) and use 
ffmpeg2theora to recode them on the fly. The recoded output is send via 
HTTP stream directly to the Cotrado player which stores the data and 
begins playing if enough data is buffered.
In practice this looks like this is a PHP file:
passthru("ffmpeg2theora -o - ".$source." 2> /dev/null");

I recoded the Queue.java (Queue class) that the queue array is not a dump 
FIFO anymore and called it QueueSeek.java.
Now the Buffer array is filled at the end and a variable points to the 
current play position which gets increased on every loop and sends the 
data to the next sink pad (at OggDemux).

QueueSeek Buffer:

           +--# data added at the end
+0-1-2-3-4-v-------
|#|#|#|#|#| | | | -> unlimited capacity
+----|-------------
     v
current play position
data will be send to demuxer

(Continue reading)

headers

andrew aspden | 27 Apr 17:28

Re: theora-dev Digest, Vol 81, Issue 9

The one I got was the download on the download page, the svn version seems to be working just fine

On Tue, Apr 26, 2011 at 12:00 PM, <theora-dev-request <at> xiph.org> wrote:

Send theora-dev mailing list submissions to
theora-dev <at> xiph.org

To subscribe or unsubscribe via the World Wide Web, visit
http://lists.xiph.org/mailman/listinfo/theora-dev
or, via email, send a message with subject or body 'help' to
theora-dev-request <at> xiph.org

You can reach the person managing the list at
theora-dev-owner <at> xiph.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of theora-dev digest..."

Today's Topics:

1. Re: Can't compile libtheora vs2010 (Timothy B. Terriberry)

----------------------------------------------------------------------

Message: 1
Date: Mon, 25 Apr 2011 13:32:44 -0700
From: "Timothy B. Terriberry" <tterribe <at> xiph.org>
Subject: Re: [theora-dev] Can't compile libtheora vs2010
Cc: theora-dev <at> xiph.org
Message-ID: <4DB5DA6C.7010805 <at> xiph.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I haven't seen our normal win32 maintainer online for a few days, so
I'll jump in here and respond to this.

> 1>c1 : fatal error C1083: Cannot open source file:
> '..\lib\dec\x86_vc\x86stat.c': No such file or directory

The project file in svn has x86state.c, not x86stat.c. I just checked.
Where did you get your project file?

As for the rest, perhaps you moved the project file relative to the
source files? (I'll note that the project files in svn are in
win32/VS2010/libtheora and the path starts with "..\..\..", not simply
".."). If so, you'll need to either delete and re-add the source files
or update your path settings.

------------------------------

_______________________________________________
theora-dev mailing list
theora-dev <at> xiph.org
http://lists.xiph.org/mailman/listinfo/theora-dev

End of theora-dev Digest, Vol 81, Issue 9
*****************************************

_______________________________________________
theora-dev mailing list
theora-dev <at> xiph.org
http://lists.xiph.org/mailman/listinfo/theora-dev

headers

andrew aspden | 22 Apr 21:04

Can't compile libtheora vs2010

I'm getting errors like so on initial build of libtheora -

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\x86stat.c': No such file or directory

1> mmxstate.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\mmxstate.c': No such file or directory

1> mmxloopfilter.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\mmxloopfilter.c': No such file or directory

1> mmxidct.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\mmxidct.c': No such file or directory

1> mmxfrag.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\mmxfrag.c': No such file or directory

1> state.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\state.c': No such file or directory

1> quant.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\quant.c': No such file or directory

1> internal.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\internal.c': No such file or directory

1> info.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\info.c': No such file or directory

1> idct.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\idct.c': No such file or directory

1> huffdec.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\huffdec.c': No such file or directory

1> fragment.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\fragment.c': No such file or directory

1> dequant.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\dequant.c': No such file or directory

1> decode.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\decode.c': No such file or directory

1> decinfo.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\decinfo.c': No such file or directory

1> decapiwrapper.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\decapiwrapper.c': No such file or directory

1> bitpack.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\bitpack.c': No such file or directory

1> apiwrapper.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\apiwrapper.c': No such file or directory

1> recon_mmx.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\x86_32_vs\recon_mmx.c': No such file or directory

1> fdct_mmx.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\x86_32_vs\fdct_mmx.c': No such file or directory

1> Generating Code... (TaskId:16)

1> Compiling... (TaskId:16)

1> dsp_mmx.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\x86_32_vs\dsp_mmx.c': No such file or directory

1> reconstruct.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\reconstruct.c': No such file or directory

1> mode.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\mode.c': No such file or directory

1> mcenc.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\mcenc.c': No such file or directory

1> mathops.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\mathops.c': No such file or directory

1> frinit.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\frinit.c': No such file or directory

1> frarray.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\frarray.c': No such file or directory

1> encoder_quant.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encoder_quant.c': No such file or directory

1> encoder_toplevel.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encoder_toplevel.c': No such file or directory

1> encoder_idct.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encoder_idct.c': No such file or directory

1> encoder_huffman.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encoder_huffman.c': No such file or directory

1> encode.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encode.c': No such file or directory

1> encapiwrapper.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\encapiwrapper.c': No such file or directory

1> dct_encode.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\dct_encode.c': No such file or directory

1> dct_decode.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\dct_decode.c': No such file or directory

1> dct.c (TaskId:16)

1>c1 : fatal error C1083: Cannot open source file: '..\lib\enc\dct.c': No such file or directory

1> Generating Code... (TaskId:16)

1> The command exited with code 2. (TaskId:16)

1>Done executing task "CL" -- FAILED. (TaskId:16)

1>Done building target "ClCompile" in project "theora_static.vcxproj" -- FAILED.: (TargetId:37)

_______________________________________________
theora-dev mailing list
theora-dev <at> xiph.org
http://lists.xiph.org/mailman/listinfo/theora-dev

headers

Silvia Pfeiffer | 12 Apr 02:44

using Kate for WebVTT encapsulation

(sending this publicly so the discussion about this is in the open)

Hi OggK, all,

OggK, you've probably seen that the bug in Firefox for adding Kate
support has been closed as WONTFIX:
https://bugzilla.mozilla.org/show_bug.cgi?id=481529

I've just posted a reply there mentioning how I envisage in-band
WebVTT support to be provided through Kate. I want to ask your
opinion.

In case you haven't heard about WebVTT yet, it's the time-aligned text
format that has been developed by the WHATWG as the baseline text
format for HTML5 media elements, see
http://www.whatwg.org/specs/web-apps/current-work/webvtt.html .
Also see http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#the-track-element
for how to include it with a audio or video element.

My idea is that - because WebVTT is so similar to SRT - it would be
simple to support WebVTT in Ogg by encapsulating it in a Kate track
and making sure that it can be extracted again without loss of
information through the kate libraries.

There would only be a few changes necessary:
* WebVTT has a header which needs to be parsed and re-created.
* Also, there is a suggestion for inclusion of name-value Metadata at
the top right after the header, which we'd want to retain (maybe in a
header or a first packet).
* Then there are cue settings, which are position modifiers on each
cue (segment of timed text). They need to be recreated, too.

The marked-up text inside cues needs to be retrieved unchanged.

For an old, but still mostly correct explanation with examples of some
of the things see:
http://annodex.net/~silvia/tmp/WebSRT/ (WebSRT got renamed to WebVTT)
and for something a bit newer see:
http://www.html5videoguide.net/presentations/WebVTT/

I'm just wondering what you think about this kind of approach.

Cheers,
Silvia.

headers

Alexander Lubyagin | 8 Apr 14:54

Inverse DCT in coding stage

Why in the procedure oc_enc_block_transform_quantize() is used function oc_idct8x8()?
After all, Inverse DCT only need to decoding stage, rather than coding?

headers

Alexander Lubyagin | 7 Apr 22:33

binary stream after tokenizer and huffman

Which procedure/function or structure returns finally formed binary stream?
I see lib/tokenize.c and lib/encode.c. But it is too hard to understand novice.
Theora algorithm differ in coding with JPEG: http://www.pcs-ip.eu/index.php/main/edu/8

Which function/structure returns stream like this:
100000100011001101101101111101011111111010110011010

headers

Alexander Lubyagin | 5 Apr 13:25

quantize after fdct, _dequant table, and idct

1) What are you doing "mathematically" in a procedure x86/x86enquant: oc_enc_quantize_sse2()?
This - the assembler code, and I do not understand mathematically - that's going on there.

--- A:
      120      121       28       73      -20      -99      -98     -100
      123      122      112      108       73      -32     -102      -98
      123      123      117      121      100       74      -15      -97
      124      125      125      124      123      116       74      -33
      125      125      125      125      124      124      100       74
      124      124      124      125      125      124      121      114
      125      125      124      125      125      125      120      117
      125      125      125      125      125      125      123      113

--- _dct:
 2767 1165 -439 154 15 24 -87 -53
 -1254 1080 -245 0 125 -15 -101 -67
 -512 260 212 -207 200 -49 -80 -55
 -111 -111 300 -166 125 -17 -70 -45
 -54 -69 127 18 -31 60 -82 -30
 -50 -30 40 83 -74 72 -68 -35
 -31 -33 37 48 -40 40 -28 -44
 -21 -13 29 12 1 -3 11 -44

--- _dequant:
 24 32 32 36 32 32 40 36
 36 36 40 40 40 44 48 56
 48 48 48 48 48 56 56 56
 52 56 60 56 60 60 60 56
 60 56 60 64 64 64 60 60
 64 60 56 60 64 64 64 64
 64 64 64 64 64 60 64 64
 64 64 64 64 64 64 64 64

--- _qdct:
 115 36 -39 -14 34 -14 4 -7
 7 -3 -1 -3 5 0 0 0
 3 -4 6 -1 -1 -1 -1 2
 -3 4 0 -2 -1 -2 -1 2
 0 1 -1 0 0 1 1 -1
 0 -1 -1 -1 -1 1 -1 1
 0 0 -1 1 -1 -1 0 -1
 1 0 0 0 -1 -1 0 -1

So, _qdct[i][j] = _dct[i][j] / _dequant[i][j] ?

2) Second question - you are using:
24 20 20 20 20 16 24 20
20 20 28 24 24 28 32 40
32 32 28 28 32 44 40 40
36 40 44 44 44 44 44 44
44 44 44 48 48 48 44 44
48 44 44 44 48 48 48 48
48 48 48 48 48 44 48 48
48 48 48 48 48 48 48 48
, or
24 32 32 36 32 32 40 36
36 36 40 40 40 44 48 56
48 48 48 48 48 56 56 56
52 56 60 56 60 60 60 56
60 56 60 64 64 64 60 60
64 60 56 60 64 64 64 64
64 64 64 64 64 60 64 64
64 64 64 64 64 64 64 64
for luma plane,

and
28 28 28 36 32 36 52 40
40 52 60 56 52 56 60 60
60 60 60 60 60 60 60 60
60 60 60 60 60 60 60 60
60 60 60 60 60 60 60 60
60 60 60 60 60 60 60 60
60 60 60 60 60 60 60 60
60 60 60 60 60 60 60 60
for chroma plane?

3) Third question. How do you restore the original matrix after fdct and quantize ...
Used dequantize + idct?

headers

Alexander Lubyagin | 4 Apr 11:39

RLE for DC/AC-coefficients separately for the blocks or at whole?

It is proper way - to code DC/AC-coefficients for all macro-blocks at whole?
I think that coding for DC/AC-coefficients for blocks separately gives lesser RLE-compression ratio.
It is right?

For example, at first we code DC-coefficients for all blocks. Compress they by RLE.
Then, AC(1) coefficients. Compress it by RLE.
And ... AC(63) coefficients for all blocks. Compress by RLE.
It is better for RLE-coding?

6	October 2011
8	August 2011
1	July 2011
15	May 2011
23	April 2011
47	March 2011
8	December 2010
8	November 2010
15	October 2010
12	September 2010
9	August 2010
13	July 2010
5	June 2010
9	May 2010
11	April 2010
42	March 2010
67	February 2010
4	January 2010
12	December 2009
11	November 2009
15	October 2009
9	September 2009
24	August 2009
18	July 2009
32	June 2009
9	May 2009
5	April 2009
11	March 2009
51	February 2009
4	January 2009
22	December 2008
66	November 2008
35	October 2008
9	September 2008
4	August 2008
9	July 2008
11	June 2008
9	May 2008
42	April 2008
20	March 2008
38	February 2008
44	January 2008
53	December 2007
21	November 2007
75	October 2007
15	September 2007
24	August 2007
31	July 2007
22	June 2007
32	May 2007
21	April 2007
22	March 2007
15	February 2007
18	January 2007
32	December 2006
12	November 2006
29	October 2006
9	September 2006
13	August 2006
27	July 2006
26	June 2006
40	May 2006
3	April 2006
15	March 2006
9	February 2006
2	January 2006
12	December 2005
37	November 2005
14	October 2005
16	September 2005
39	August 2005
24	July 2005
3	June 2005
18	May 2005
26	April 2005
67	March 2005
18	February 2005
60	January 2005
37	December 2004
34	November 2004
66	October 2004
90	September 2004
158	August 2004
41	July 2004
42	June 2004
95	May 2004
35	April 2004
85	March 2004
88	February 2004
2	January 2004
33	December 2003
3	November 2003
11	October 2003
6	September 2003
43	August 2003
11	July 2003
95	June 2003
67	May 2003
12	April 2003
47	March 2003
90	February 2003
66	January 2003
17	December 2002
21	November 2002
88	October 2002
99	September 2002
20	August 2002
1	June 2002

Mon	Tue	Wed	Thu	Fri	Sat	Sun

		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29