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OpenDivX digest, Vol 1 #45 - 4 msgs



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Today's Topics:

   1. SR-RTP v.0.1.0a Alpha Release (Nick Feamster)
   2. Re: OpenDivX Encoder -> OpenDivX (Yannick Durand)
   3. General Development Discussion - All Projects -> OpenDivX Daily Forums Digest (Darrius "Junto" Thompson)
   4. OpenDivX Encoder -> OpenDivX Daily Fourms Digest (Darrius "Junto" Thompson)

--__--__--

Message: 1
Date: Thu, 22 Mar 2001 14:22:02 -0500 (EST)
From: Nick Feamster <[email protected]>
To: <[email protected]>
Subject: [OpenDivX] SR-RTP v.0.1.0a Alpha Release

Hello,

Libraries for selectively reliable RTP (libsrrtp.a) have been released.
This allows for selective retransmission and adaptive transmission of
real-time data, such as MPEG-4 Video. I've compiled this successfully on
Linux with gcc 2.96.

librtsp.a also includes sample, extensible RTSP/SR-RTP client/server
that has been used to hack up a dummy sample app.

There is a sample app that demonstrates proof of concept and could
easily be expanded to be merged with something like the DivX player (hint,
hint...).  Note: you won't see pretty pictures -- the received file is
saved to /tmp/mpeg_bitstream.bits, and you will have to decode this with
something like the MoMuSys MPEG-4 decoder (waht I used for tests).  Let's
fix this!

Documentation is included; extensive documentation is at
http://nms.lcs.mit.edu/software/videocm

Note that this is an alpha release, and there are probably some bugs.
Also the API is flexible at this point.

Nick






--__--__--

Message: 2
From: "Yannick Durand" <[email protected]>
To: "Darrius \"Junto\" Thompson" <[email protected]>,
	<[email protected]>
Subject: Re: [OpenDivX] OpenDivX Encoder -> OpenDivX
Date: Thu, 22 Mar 2001 21:38:01 +0100

Where can I find this softwares  ??
----- Original Message ----- 
From: "Darrius "Junto" Thompson" <[email protected]>
To: <[email protected]>
Sent: Monday, March 19, 2001 6:07 PM
Subject: [OpenDivX] OpenDivX Encoder -> OpenDivX






Topic: OpenDiVX Codec and Adobe Premiere
Author: Thetrooper
Posted: 2001-03-16 04:16
------------------------------------------------------------------------
--------
Try to use Ulead Media Studio Pro v6.0 but you can use only 3.xx codecs,
not 4.xx
The best choice is use VirtualDub1.4c


Topic: Low bitrate encoder test results
Author: eagle
Posted: 2001-03-16 06:01
------------------------------------------------------------------------
--------
How does the alpha48 version look?  We have better quality and faster
algorithms in the pipeline!

eagle


Topic: OpenDiVX Codec and Adobe Premiere
Author: BetaBoy
Posted: 2001-03-16 09:46
------------------------------------------------------------------------
--------
Trick Premiere by Adding the codec as a filter. This works for some
people.[addsig]


Topic: OpenDiVX Codec and Adobe Premiere
Author: BetaBoy
Posted: 2001-03-16 09:48
------------------------------------------------------------------------
--------
Tell Adobe to support OpenDivX in Premiere 6.0 Clicking this link: <!--
BBCode Start --><A HREF="http://www.adobe.com/support/feature.html";
TARGET="_blank">www.adobe.com/support/feature.html</A><!-- BBCode End
-->


Topic: Is it possible to have a test app for encoder and
decoder ?
Author: gruel
Posted: 2001-03-16 11:26
------------------------------------------------------------------------
--------
I finally found the time to write two small
test appications: test_enc.c and test_dec.c
It's just a few lines that encode a single raw RGB picture into a
opendivx-frame (version 4.0alpha48) and back. 
Just for demonstration of course.

If anyone wants to have a copy: ask for it at <a
href="mailto:[email protected]"; target="_new">[email protected]</a>


_______________________________________________
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--__--__--

Message: 3
Date: Thu, 22 Mar 2001 18:13:11 -0800
From: "Darrius \"Junto\" Thompson" <[email protected]>
To: <[email protected]>
Subject: [OpenDivX] General Development Discussion - All Projects -> OpenDivX Daily Forums Digest





Topic:		open divx =3D too dark
Author:		Trigger2000
Posted:		 2001-03-21 21:28
------------------------------------------------------------------------
--------
oh  yeah.

i use win2k too, and you're right.
it was the nvidia grafic driver.

i set in the overlay controls the brightness
to 130 % and ... a fantastic change.

thanks for that idea.


Topic:		Windows 2000 problem
Author:		nicolec5903
Posted:		 2001-03-21 21:47
------------------------------------------------------------------------
--------
I know, Windows 2000 does the same for me. No codec works.  I've tried
them all. =20
Could someone please post some help for us?


Topic:		Isn't MPEG-4 in Quicktime Format?!
Author:		Gsg
Posted:		 2001-03-21 22:38
------------------------------------------------------------------------
--------
CAHIGHLANDER:

Is the QT/MP4 library source code you have the same as that which has
been used in connection with the IETF MP4 streaming activities ?

Gsg


Topic:		free movies
Author:		P-Lab/
Posted:		 2001-03-22 00:19
------------------------------------------------------------------------
--------
<!-- BBCode Start --><IMG
SRC=3D"http://divxyz.free.fr/bboard/divxyz-testimonial.gif";><!-- BBCode
End -->

US traduction available on <!-- BBCode Start --><A
HREF=3D"http://www.babelfish.com/Translations.shtml";
TARGET=3D"_blank">babelfish.com</A><!-- BBCode End -->


Here is a "test my player" movies serie=20

Bien =E0 vous.

P-Lab/

<!-- BBCode Start --><A HREF=3D"http://www.Divxyz.com";
TARGET=3D"_blank">DivXYZ.com</A><!-- BBCode End -->
DivXperimental Video Download.



[ This message was edited by: P-Lab/ on 2001-03-22 00:28 ]


Topic:		movies
Author:		P-Lab/
Posted:		 2001-03-22 00:22
------------------------------------------------------------------------
--------
<!-- BBCode Start --><IMG
SRC=3D"http://divxyz.free.fr/bboard/divxyz-testimonial2.gif";><!-- BBCode
End -->

Englishe traduction available on <!-- BBCode Start --><A
HREF=3D"http://www.babelfish.com/Translations.shtml";
TARGET=3D"_blank">babelfish.com</A><!-- BBCode End -->


Here it is.
Please use the OpenDivX Codec.

New WebSite coming soooooon=20

A la prochaine

P-Lab/


<!-- BBCode Start --><A HREF=3D"http://www.Divxyz.com";
TARGET=3D"_blank">DivXYZ.com</A><!-- BBCode End -->
DivXperimental Video Download.

[ This message was edited by: P-Lab/ on 2001-03-22 00:25 ]


Topic:		Windows 2000 problem
Author:		wanton
Posted:		 2001-03-22 03:44
------------------------------------------------------------------------
--------
Sounds like you people are mixing DivX and OpenDivX. DivX and OpenDivX
aren't compatible meaning you can't play DivX with OpenDivX and vise
versa. Projectmayo is OpenDivX site you can get OpenDivX codec here and
you can get DivX example from www.mydivx.com and many other pages. Video
files encoded with DivX found in internet uses old DivX codec but in
future when OpenDivX gets better than original DivX there might be also
OpenDivX encoded files there too. If you know what FourCC code is then
original DivX has DIV3 as FourCC code. And if i remember correctly
OpenDivX has FourCC code of DIVX.

I'm hoping OpenDivX team would add decoding support for original DivX to
OpenDivX but that won't probably happen because of legal issues because
original DivX was hacked microsoft codec. Maybe just doing decoding
support would be still legal....maybe?=20


Topic:		Intel 810
Author:		row7
Posted:		 2001-03-22 08:18
------------------------------------------------------------------------
--------
Dear Project Mayo people,=20

are you planning to make the OpenDivX 4 codec work with Intel 810 grafic
cards???=20
(Open DivX didn't work on my 810 chip, the old DivX 3 does!)



--__--__--

Message: 4
Date: Thu, 22 Mar 2001 18:13:53 -0800
From: "Darrius \"Junto\" Thompson" <[email protected]>
To: <[email protected]>
Subject: [OpenDivX] OpenDivX Encoder -> OpenDivX Daily Fourms Digest




Topic:		Does DivX have B frames?
Author:		Adia
Posted:		 2001-03-22 01:05
------------------------------------------------------------------------
--------
Hi,

Thank you very much!
Could you tell me the detail about bit rate control method which
OpenDivX employs?
Does I-Frames always use constant quantizer 8?
Is P-Frames's quantizer related to forward n P-Frames's MADs and
quantize parameters, even allocated bits number? The current P-frame
don't care about forward I-frame's allocated bits number, is it right?
Your help will be appreciated.


Topic:		Encoder progress?
Author:		wanton
Posted:		 2001-03-22 07:26
------------------------------------------------------------------------
--------
What's the progress of fixing problems that doom9 pointed out in his
page (artifacts if there is a lot of motion changes) and progress of
following too: Bitrate control to at least as good as original DivX and
2pass encoding support? I really like to know when these updates are
coming=20


Topic:		New Codec On The Block (SBC)
Author:		wanton
Posted:		 2001-03-22 11:09
------------------------------------------------------------------------
--------
Just saw Smart Bitrate Control sample. Looked really amazing quality no
visible artifacts even with lot of motion. And it handle that matrix
lobby explosion scene really good that had been used to test codecs at
doom9 page. I heard that SBC is 2 pass encoding method.

Just wanted to add something. SBC sample i saw looked better than most
(or maybe any) SVCD that i've seen or done and i hope they release
encoder to public soon. I also saw sample from ledeng of baggar vance
encoded with SBC and it looked really good too. VCDVAULT seems to have
real winner here [ This message was edited by: wanton on 2001-03-22
11:13 ]


Topic:		OpenDivX Variable Bitrate Encoding
Author:		AnonyMS
Posted:		 2001-03-22 11:18
------------------------------------------------------------------------
--------
The movie group VCDVaULT has developed one of the world's first VBR
Mpeg4 encoders using the DivX 3.11 alpha codec. You can read about it
here at <a href=3D"http://www.vcdvault.net"; target=3D"_blank"
target=3D"_new">http://www.vcdvault.net</a>

vV found out that the only differences between Low-Motion DivX and
Fast-Motion DivX were compression factors. (something like a range of
(2-4 for low motion and 5-16 for High Motion) They also figured that by
manipulating this internal variable they could make the low motion codec
act like the fast motion codec, or even start acting like the low motion
codec again. Their encoder is also fairly interesting. It is a two pass
VBR system, with scene based keyframe insertion, true VBR control based
upon a motion curve and stats generated in a first pass.. Among other
things that vV figured out was the fact that crispness/sharpness of the
Mpeg4 codec is also useful to modulate based upon motion because of
properties that it exhibits at certain bitrates (An unsharp filter is
applied to make the image easier to compress with certain sharpness
settings). The encoder also has its own unique motion detection
algorithm used for motion based modulation of the compression factor...

All of this info they gleaned from disassembly of the existing codecs
and reading the assembly source code.

The encoder is not released yet, but it should be soon.

Anonymous vV Programmer[ This message was edited by: AnonyMS on
2001-03-22 11:19 ]


Topic:		New Codec On The Block (SBC)
Author:		AnonyMS
Posted:		 2001-03-22 11:24
------------------------------------------------------------------------
--------
It isn't a codec. Its an encoder. Through disassembly of the existing
DivX 3.11 codecs, we found that there were many internal codec variables
that could be manipulated in ways never ever thought of before. We found
that you can change the compression factor of the MS codecs on the fly,
in essence, morphing the low motion to high motion, and back again, with
no side effects.. We implemented a motion based two pass truly VBR
system in our encoder.. with a bunch of other spiffy features. Read the
VBR OpenDivX thread for some more info I posted.

It will be released soon, under GPL of course. Eventually we might turn
our attention to OpenDivX development.. although we don't know how much
of this 'content control' idea we want to support.

Anonymous vV Programmer


Topic:		New Codec On The Block (SBC)
Author:		wanton
Posted:		 2001-03-22 11:26
------------------------------------------------------------------------
--------
Kick's ass  Great work guys=20


Topic:		jorel1
Author:		daxgk
Posted:		 2001-03-22 19:50
------------------------------------------------------------------------
--------
Hi,

sorry if this is a stupid question, but is there any way to convert a
DivX encoded movie file to Quicktime? =20




--__--__--

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