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#1 |
Banned
Feb 2009
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I'm surprised at the difficulty I've experienced in finding an answer to this seemingly simple question, but I've had no luck in finding any answer online. I've seen multiple discussions with seemingly no resolution.
Can I take a DVD compliant mpeg-2 and author a Blu-Ray without re-encoding? I know Blu-Ray supports 720x480/576 (59.94i/50i) mpeg-2, the same as DVD, but there's often more to it than that. I know that Blu-Ray does not support 704x480, although DVD does. So any 704x480 DVDs are not compatible with Blu-Ray without re-encoding. Also, I don't believe Blu-Ray supports mp2, although it does support AC3. How about progressive scan DVDs? Does standard def content have to be interlaced to be Blu-Ray compatible? I'm not looking for specific software programs to allow me to author a Blu-Ray. What I want to know is if I'll be able to take the DVDs I create today and author a Blu-Ray sometime in the future without re-encoding. If not, then how do I make standard definition material compliant with Blu-Ray specs. Are there any types of DVD-compliant mpeg-2 streams (aside from the examples I gave earlier) that are not Blu-Ray compliant? Thanks |
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#2 |
Blu-ray Count
Jul 2007
Montreal, Canada
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yes, that is why a lot of the extras are exactly the same as the DVDs.
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#3 | |
Banned
Feb 2009
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How do you know they're exactly the same? They could have been encoded twice, once for DVD and once for Blu Ray. I've already given examples (e.g. 704x480, mp2) that cannot be Blu Ray compatible (but would have been HD DVD compatible BTW). So, are all 720x480 AC3 DVDs Blu Ray compatible, and how do you know? Even if they are exactly the same on the DVDs and Blu Rays you've seen, that does NOT imply that every DVD mpeg-2 is Blu Ray compatible. IF the Blu Ray specs are more picky than DVD about which mpeg-2 streams they'll allow, THEN they would first encode the stream to be Blu-Ray compatible (and then it would also be DVD compatible because DVD specs are less picky). It all depends on whether DVD or Blu Ray has the more stringent specs. So more elaboration would help me understand if you know what you're talking about or just guessing. Thanks |
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#4 |
Blu-ray Count
Jul 2007
Montreal, Canada
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if you want more info http://www.blu-raydisc.com/Assets/Do...2955-15269.pdf
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#5 |
Banned
Feb 2009
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Okay, thanks for your response. I don't think the answer is going to be in a document quoting specifications. The only way to know for certain is if the people who created the Blu-ray specs actually state that DVD compatible mpeg-2 is also Blu-ray compatible (or for someone to actually try it out and confirm that they are compatible). To that end, I'm just going to look for a Blu-ray authoring program that will tell me which streams are compatible and which ones are not (i.e. one that does not re-encode). Unfortunately, what I've heard is that these types of authoring programs are very rare right now. Almost anything out now that authors Blu-rays will re-encode everything, whether it needs re-encoding or not. Right now it looks like DVD-compliant mpeg-2 at 720x480 with AC3 audio will be Blu-ray compliant, but anyone who's ever dealt with digital video will know that it's almost impossible to anticipate every potential incompatibility, especially with optical discs.
I can't say that I'm too pleased with the Blu-ray specs, to be honest. HD-DVD was much more inclusive in terms of the types of SD video allowed. It's actually rather ridiculous that all DVD videos are not Blu-ray compliant. Why go as far as to include 720x480 mpeg-2 in the specs but then not allow 704x480. So, it really wouldn't shock me to learn that 720x480 mpeg-2 is allowed on Blu-ray, just not anything that was DVD compatible. That's not really the only disappointing thing about Blu-ray. Much of the news I've read has focused on Blu-ray being anti-consumer, in that many of the plans for the format would have made it difficult for average users to produce and author their own Blu-rays. I don't know if it's going to pan out that way, but these people come across as jerks in terms of some of their plans for the format. I realize that this is more of a consumer oriented forum (i.e. focused on the consumption rather than the production), but that's largely going to change in the next couple years as people start producing their own content and start getting annoyed with the incompatibilities and short-sightedness that may (or may not) be present in the format. |
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#6 |
Blu-ray Samurai
Jun 2007
Omaha NE
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I don't know what the point would be to use standard def video to produce a Blu-ray Disc since it is not Hi Def. All Blu-ray players do play DVDs it is not going to look any different on a Blu-ray Disc. I can only see people wanting to make Blu-ray Discs of Hi Def video only.
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#7 |
Active Member
Nov 2008
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Blu-ray (or more specifically AVCHD) can be authored with an SD MPEG2 elementary video stream. I am sure that either 23.976fps, 25fps or 29.98fps (pulldown) will be ok but I haven't tried this with SD content.
The average bitrate, peak bitrate, initial buffer and decoded picture buffer for these streams will fall well under what AVCHD specs allow for so that wont be a problem either. DVD's are encoded within the MPEG2 main profile, while AVCHD allows High Level so this also wont be a problem either as DVD's are encoded with less complex algorithms, therefore producing a stream that is less demanding to decode. Also, I know AVCHD technically doesn't support DTS audio. However, you will find every Blu-ray player will play an AVCHD disc authored with a DTS audio track. I don't know what sort of information you are looking for exactly but if you would like us to be more specific, please be more specific with your questions. It is also fair of us to ask why you want to do this? I don't think backwards compatibility between Blu-ray and DVD (red optics) will be removed at any time in the future. Last edited by Ryu77; 02-17-2009 at 11:06 AM. |
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#8 | ||
Banned
Feb 2009
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Some of the stuff that I encode really isn't practical to do in HD, at least not for a long while. For instance, if you do wireless video from a radio controlled craft, the only practical way to transmit (and therefore record) the video would be in SD. So, for some scenarios, even when HD becomes much cheaper and easier to encode, it still won't be practical to do HD. Wireless HD video isn't currently practical and probably won't be for a long time. Quote:
This illustrates the difference between content consumers (you) and content producers. Why would I spend the effort now making DVDs and totally ignore the potential of placing it on a Blu-ray in the future? Last edited by JLMTSTT; 02-17-2009 at 02:50 AM. |
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#9 |
Active Member
Oct 2006
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try tsmuxer (via tsmuxergui). This should let you demux your vob, then remux to author a BD. Whether or not they play on any or all BD players, you will have to check for yourself. I doubt tsmuxergui will let you demux a vob that is copy protected.
Unless you plan to add some extra feature to this that dvd doesn't support, I don't see why you'd bother, though, since all BD players can play dvds. I can't answer what formats (i.e. 704x480) that play on dvd will also play (or in this example not play) on BD. |
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#10 | |||||||
Active Member
Nov 2008
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![]() I have been messing around with digital media for quite some years myself so I probably find it easier than most with these applications. However, I can see far more potential in what Blu-ray offers compared to DVD so I am sure we will see a lot more user friendly software to come. Quote:
Please respect those that have taken the time to provide you with answers. It is they that have given you their time. The least you can do is be thankful for it. If you don't like the answers given here then by all means leave here and post somewhere else. Last edited by Ryu77; 02-17-2009 at 07:51 AM. |
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#11 | ||||||||
Banned
Feb 2009
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"I don't know what sort of information you are looking for exactly but if you would like us to be more specific, please be more specific with your questions." You specifically stated you wanted more information, so I gave it to you. It seems to me you're the arrogant "genius". Quote:
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This is a Blu-ray forum. I asked a simple question about Blu-ray to which I received no answer. I'm perfectly capable of coming up with the answer on my own, but I was hoping I could do it a little easier. My assumption was that since this is an official (?) Blu-ray forum, there would be people here that are intimately involved with its design. I was wrong. This is clearly a very non-technical, consumption oriented forum. Quote:
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I didn't want a bunch of fluff in this thread. I just wanted a clear and concise answer from an expert. I would be fine with no responses if no one has an answer. As I stated, my tone is purposeful. I don't want a huge discussion that goes nowhere. I just wanted an expert to respond. I really don't mean to imply that anyone here doesn't have a strong understanding of Blu-ray and digital video. The problem is that I've already talked to experts on video forums that couldn't answer this question properly. That's why I was looking for people who were actually involved intimately with Blu-ray. As I stated, I will obtain a Blu-ray authoring program that does not re-encode to verify Blu-ray compliance. I'm also curious about other codecs besides mpeg-2, so it should help with that as well. I stated this earlier, then you chose to respond and ask me for more info. Then you chose to criticize me when I gave you the info you asked for. If you don't like my tone, then take a hike. Less for me to have to read through. Furthermore, my question basically amounts to a basic yes or no answer (followed by some explanation). No, your answer didn't help. My question was, can my CCE encoded mpeg-2 (created for DVD) be put on a Blu-ray without re-encoding. That's it. Did you answer it? Last edited by JLMTSTT; 02-17-2009 at 09:30 AM. |
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#12 | |
Banned
Feb 2009
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I don't deal with any copy-protected material. It's all stuff I shot and produced myself. |
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#13 | |||
Active Member
Nov 2008
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Have you at least given tsMuxeR a look yet? It would be a very handy application to do your own testing. tsMuxeR is extremely lightweight and very quick. It can multiplex about 4GB per minute. Last edited by Ryu77; 02-17-2009 at 11:05 AM. |
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#14 | |
Banned
Feb 2009
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I have no Blu-ray gear at all. My only purpose for an authoring program is to know if the video is Blu-ray compliant, without actually ever playing it on a player. For that reason, I have to be 100% confident that the program will only accept compliant videos and inform me when something isn't compliant. I'd be happy to try it, but from what I've heard, it will author non-compliant videos, and then I would have no way of knowing it. I'm still about a year away from buying a burner, but I'm anticipating that the stuff I do now will eventually end up on a Blu-ray. I'm actually also considering h.264 SD, but I'll leave that for another time. Are you saying what I've heard about tsMuxeR isn't true? For instance, I use TMPGEnc DVD Author to author DVDs. It tells me right away if a video is not DVD compliant. I can rely on it, and I don't ever have to play the DVD to know that it was authored correctly. It always works. |
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#15 | ||
Active Member
Nov 2008
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![]() Making the move to h264 encoding is certainly a wise one. You will save at least one third bitrate for the same quality vs. MPEG2. The only consideration is how CPU intensive it is to encode. Yes, tsMuxeR will multiplex BD content that is non standard. I assumed you had a player of some sort... My bad. You could start with AVCHD authoring. You could get 60 to 90 minutes (maybe more depending on content type and encoding parameters) of high quality 1080p video on a dual layer DVD.This way you could still use your red laser burner and play back media through your PC via ArcSoft TotalMedia Theatre. I am almost 100% sure that DVD MPEG2 streams are fully compliant within the BD/AVCHD standard. For me to be 100% sure, I would need to do more research myself. The information that I have already given you was an elaboration of the short answer of "yes". A MPEG2 video stream that is DVD compliant will have no problem being placed within BD/AVCHD structure. However, only 720 x 480 or 720 x 576 resolutions are supported as you have already stated. The Blu-ray white paper that Anthony P linked to provides a table on page 17. I have used the white paper for a reference numerous times when I was in initial stages of getting my head around the Blu-ray format. ![]() Quote:
By the way, you are correct in the fact that this is more a consumer based forum. I am one of the very rare members here that have an interest on an authoring level for Blu-ray. Try Doom9 or AfterDawn if you want better technical answers in regards to encoding and authoring etc., I am a member on both those forums. Last edited by Ryu77; 02-17-2009 at 11:25 AM. |
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#16 | |
Banned
Feb 2009
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I'll give the other forums a try. Here are some threads that I've read (not participated in): http://www.videohelp.com/forum/archi...y-t358469.html http://forum.videohelp.com/topic346387.html http://forum.doom9.org/showthread.ph...blu-ray+mpeg-2 As you can see, this has been discussed extensively on other forums without resolution. So, I hope you can see why I didn't want to start another thread that would meander and not actually answer the question. I'm sorry if I came across as rude. Thanks. |
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#17 |
Banned
Feb 2009
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And here's a thread that I started on the topic:
http://www.dvdnextcopysupportforum.c...ead.php?t=6697 So, you can see that I've come here when I'm just about fed up with the whole thing. |
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#18 |
Banned
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to the Op
u can put mpeg-2(dvd) onto bluray...but why its same quality the only difference is u can put more data why not encode to bluray spec (1080p and atleast ac-3 audio format) that way don't have to wait or u can watch hd content until the studios release (i assuming that u owned the dvd copy ) trust me its pretty goodquality which i can tell the difference between upconverting and encoded bluray quality |
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#19 | |
Banned
Feb 2009
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Have you read this thread? If you had, you would know your response is totally off-topic and completely unhelpful. I assume you just read my original post and read nothing after that. Take note of this, Ryu77. |
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#20 | |
Active Member
Nov 2008
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I would also like to take this as an opportunity to explain that I may have come across as harsh because (with no ego intended) I kind of believed that I may have been one of the very few (if not the only) member here that would have been able to discuss this on the level you were looking for. Good luck. ![]() Edit: By the way, I hope you managed to see my previous edits (I added more information for you in my above post). Last edited by Ryu77; 02-17-2009 at 12:15 PM. |
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