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25th June 2008, 16:15 | #21 | Link | |
(schein)heilig
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@SMD Thx for the info. Will be interesting to keep an eye on this.
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Brother John When lost in BeSweet's options, have a look at the Commandline Reference. DVD nach MPEG-4 klappt nicht? Verzweifelt? Auf zum Encodingwissen! |
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26th June 2008, 03:48 | #23 | Link |
CoreCodec Founder
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\0/ I can talk about it now ;-) its good to hear that DivX has adopted Matroska (welcome aboard)... I will talk about more details on what is coming up for Matroska, especially as it relates to v2.0 and the Matroska Foundation later on (and not to go far OT).
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27th June 2008, 04:25 | #25 | Link |
I dont care so should you
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Yes I would like to see this as well... I have 2 3870 x2 OC edition's and would love to see them help the CPU Out...
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27th June 2008, 19:01 | #26 | Link |
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will divx use native avc mode or vfw compatbility mode in mkv?
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28th June 2008, 04:48 | #28 | Link |
Does it really matter?
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All this hardware compatibility stuff seems an odd discussion to be having considering how much is defined by the H264 standard. Shouldn't you just be able to use the different levels to determine hardware compatibility rather than creating your own (which for the most part are very limited compression wise in ASP). That way every encoder can simply conform to the various levels rather than trying to meet a specific set that divx sets.
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30th June 2008, 20:02 | #32 | Link | ||
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Similar to the decoder we are working on the software implementation first. Of course there is always a chance in the future, but it's not something you'll see in 7.0. Although GPU encoding could be fast (in fact a recent article from Anandtech show it is fast), I'm going to hold my breath until I see someone talk of the quality/efficiency that can be achieved. You'll notice that so far the details here range from light to non-existent CUDA though is definitely interesting, as is the AMD Stream Computing SDK. While we continue to develop elements of our spec we're trying to avoid going into details too early. I'll make sure to address your question as soon as I'm able to do so with confidence. Quote:
Levels are one way to go, but then ASP also had levels. Levels work only if all manufacturers fully support everything in the same level equally well, and that doesn't always happen. There are ASP devices even today that still can't pass DivX Home Theater certification. What we actually did with ASP was to talk to many manufacturers to understand what all of their devices were capable of in terms of feature support, rate support and so forth, and then define a profile that we believed would bring interoperability across many of these devices without sacrificing efficiency too much. We're doing the same now for H.264 and we have had a lot of feedback that is very varied. The challenge is to bring this all together into a good solution not only for the manufacturers but for the community. Beyond the spec for the video bitstream we also need to ensure that every element of the format is specified and that conforming media will play reliably everywhere. It's neither a small nor easy task. Sounds like a press release! |
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30th June 2008, 20:26 | #33 | Link | |
Does it really matter?
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Well IMHO I think that saying that 50MB of space is plenty of space to waste for the same quality of video. I suppose if I look at it from your compatibility point with your profiles the quality is fine for that. I however don't really buy into the argument that the levels can't be used. they are well defined on what one should expect out of each profile. A hardware manufacturer can't say the support x level if they really don't. So in reality it would be best to push fully compliant support across hardware manufacturers. While this is definitely detrimental to DivX on the branding level as DivX compliant would simply be another word for AVC Levels Compliant I think it would be better off for AVC as a whole and accomplishes the same point of what Divx certification does. that's the main difficulty with ASP is that there are so many different vendor specific profiles going around (Nero, Divx, Xvid (various)) that I personally see myself looking at a huge chart going.....so what plays what? Will my Nero files play on divx will my divx files play on nero. If everyone sticks to the standard I don't have to ask myself that question if I buy such a hardware device. We need to avoid it in AVC if at all possible. At least that's how I feel about it. Not sure how many would agree with me but I think that fewer profiles is better. |
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30th June 2008, 21:10 | #35 | Link | |
x264 developer
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Even DivX obviously can't get playback everywhere; unless you're willing to go for Restricted Baseline to satisfy iPods, of course, in which case you're completely crippling the format to the point of uselessness, which I'm pretty sure DivX won't do. You have to draw the line somewhere, no matter who you are and what you're doing. |
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30th June 2008, 21:23 | #36 | Link | |
Does it really matter?
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For all these things XBOX 360, PS3, ipods, iphones, etc used levels it would be a much better place. |
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30th June 2008, 21:31 | #38 | Link |
Life's clearer in 4K UHD
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High@Level 4.1 is the maximum specified profile for both Blu-ray and HD-DVD....
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30th June 2008, 21:37 | #39 | Link |
x264 developer
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And most STBs and Xbox 360 and PS3 and all hardware-acceleration-supporting graphics cards and basically all standalone players...
I can't think of anything in the gap between "hardware player supporting HD material at Level 4.1" and "little device I can hold in my hand" (PSP, iPod, etc). |
30th June 2008, 21:38 | #40 | Link |
(schein)heilig
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As I understand it, the problem is that every manufacturer can just use the label »support for H.264 profile/level x/y« without any restriction. There are no procedures in place to ensure that such a device actually fully supports profile x and level y.
On the other hand you are only allowed to put a »DivX profile X« sticker onto your device if you’ve gone through the DivX certification process. So as a consumer the DivX profile label tells me exactly and (more important) reliably what the device is capable of. Of course the full DivX profile specs should be freely available to everyone so that one can setup any encoder to produce compliant video. That might already be the case for current DivX profiles, I’ve never checked.
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Brother John When lost in BeSweet's options, have a look at the Commandline Reference. DVD nach MPEG-4 klappt nicht? Verzweifelt? Auf zum Encodingwissen! |
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