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16th December 2002, 18:28 | #1 | Link |
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>h.264< ?
Hi,
yesterday I read a newsline called "h.264" in a magazine. I`ve wondered me because they said, it makes mpeg1+mpeg2 files only a half/quarter of the size it would produce today. But only the hardware today is to slow. Anybody heard something else about? Or can somebody correct me if I`m wrong. [Update] For all who want to test the interesting new codec and maybe the future of MPEG goto Rarewares http://www.inf.ufpr.br/~rja00/ under the mpeg section The source can be found at hdot264 page The project is still in very early development. So all who don`t want to test the codec may waste time because even with the fastest settings it still takes some minutes to encode a single frame. Also decoding is very buggy. But the result is amazing. All people should hope that this project gets continued because the potential is huge. good settings for the encoder.cfg: (from Tommy Carrot, Selur) -reference frames=1 -searchrange=8 (instead of 16) -RDOptimization=0 -AdaptiveBlockTransforms = 0 (may result in crash, I have to set it to 2) -NumberBFrames = 0 (disable) decoder.cfg: -move the file to C:\ or maybe the codec won`t find it -set: 0 ........NAL mode If your are still not able to decode the avi, use yuv2avi to convert the yuv file to avi. Use a low res to speed up the encoding! @developers Please continue the good work! It`s worth doing so!
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everyday is a good day... except this one. Last edited by Shootist; 11th January 2003 at 16:39. |
18th December 2002, 05:13 | #6 | Link | |
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Quote:
No changes since months. |
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18th December 2002, 16:38 | #7 | Link |
Blah!
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Yes, but at least the author seems to be alive.
http://www.everwicked.com/forums/sho...&threadid=1540 |
19th December 2002, 16:02 | #8 | Link |
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ok, I tried to download the source and compile it, but I`m not so familar with sourceforge`s system. is there a tool to download the source easily? (I tried WINCVS, but I had many problems with this tool)
would be cool if someone answers...
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19th December 2002, 17:24 | #9 | Link |
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@IBJr
sorry i forgot to mention the old name H26L @Shootist http://bs.hhi.de/~suehring/tml/download/Unofficial/ there you can find the newest unofficial Reference Code by one of the VCEG Memberst he is the Software Maintainer and as you can see long time no update has been done on the Reference Code it looks like their almost finish and the new Spec is going to be released soon only speculations but the evidence speaks for itsself Mpeg-4 V10 AVC lays in Santas christmas bag |
20th December 2002, 04:38 | #11 | Link |
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Be warned: The reference software is VERY slow. It ain't good for anything else than short (~100 frames long) tests.
But after the h.264 is standardized, i guess we shall see several project based upon it. Maybe Xvid2 too? |
20th December 2002, 05:50 | #12 | Link |
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h.264 is going to be adopted to the mpeg4 standard as "Advanced Video Coding" AVC profile.
So no need for xvid to split up - or did we call it xvid1 vs xvid0 when we started implementing Advance Simple Profile (vs. Simple Profile)? We'll modify the GUI so you can choose the profile you want to use for encoding which enables/disables xvid's vfw controls accordingly. But let's wait for the integration/presentation of h.264 into mpeg4 first - and let's make ASP stable. Regards Koepi
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20th December 2002, 06:13 | #13 | Link | |
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But your version sounds better, i would be glad if that is possible without difficulties. |
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20th December 2002, 06:27 | #14 | Link |
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The AVC profile will be a radical departure from the other profiles. I would rather see a fork into a new project (or even start from scratch with the reference source and optimize from there).
It's just that almost all the core components - the transform, quantization method, motion compensation, block sizes, frame referencing, vlc codes, block storage syntax, etc. - are different compared to the existing MPEG-4 profiles. It could be implemented inside XviD, but there'd be such small amounts of shared code it would cause a lot of headaches - about the only functions you could share between AVC and the rest would be sad16/sad8 and colorspace conversions! Not that I wouldn't like to see it done I know Isibaar has been keeping an eye on the development of the standard. I haven't looked too closely at it actually, so it might have more shared parts than I'm thinking. -h |
20th December 2002, 07:39 | #15 | Link |
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You are right. There is almost nothing in common between H.264 and the old MPEG-4. Sharing a common code base does not make a lot of sense, IMHO.
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20th December 2002, 15:25 | #16 | Link |
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BTW, -h, do you and Isibaar & other xvid developpers plan to work on H264 now ?
I've been some far away from xvid project, because, at the point it was when I looked at it, I didn't feel very useful and it needed quite work in order to be fully inside the core project. But, then, to starting a new fork, I'd greatly appreciate join your team. I've democoded some quite long some years ago, and did a software to treat signal on my F030's DSP, so I think my skill can still be of some use here, when talking about optimisations and signal processing. But dou you guys have new about the Hdot264 project ? Maybe it's the fork that's to join. I'm waiting the finalization of the standard, though... Vincent
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20th December 2002, 15:26 | #17 | Link |
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X-Mas & so on
BTW, I wish you all a merry X-Mas and happy new year, at least a happy christmas, as I won't be available until then.
Vincent
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20th December 2002, 16:20 | #18 | Link |
Kilted Yaksman
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There's not really any formal way to join or contribute to XviD - write some code, post it to the devel mailing list, and if it works (well) it'll probably get committed in some form. Point optimizations (such as only rewriting or creating assembly for a single function, like an RGB->YV12 conversion) are the most common and easiest bits of code to create.
I don't know of any concrete plans to work on a H.264 codec, but if it's done I know that any coding experience is welcome. -h |
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