| Author | Message | ||
     M.H. Rating: |
I was in recent time expereimenting a lot with simultanous real time double camera processing by th help of DirectShow technology using Microsoft frealy available GraphEdit as a GUI. You can see some useful screenshot on this link: http://mysak.umbr.cas.cz/~husakm/Public/GraphEditSchemes/ If you will play a bit with GraphEdit, you will catch how to sync 2 WebCam, DV cam or anything you want ... The DepthQ filter (stereo video renderer) and VEL Stretch Stereo filter (video mixer) are custom non-public components ... But you can put a lot of useful setups together even without them ... | ||
| Anonymous Rating: N/A |
here's a company that uses DirectShow to mix video streams in real time. They claim it works with DV cams, webcams, or video capture cards... basically anything that has a video source driver. http://www.realtime-3d.com | ||
| sdy Rating: N/A |
Cool! Where do you get the DepthQ and VEL filters? | ||
| M.H. Rating: N/A |
DepthQ is a comercial product (www.depthq3d.com) ... Just now it is not price accptable for normal people (we use it for HDTV stereo-video projection as IMAX alternative now) ... But maybe we will relese some resticted version for normal people as well ... The video mixing filters are still under testing - maybe the realtime-3d people have them in higer stage of development ... But I know that David Sykes was working on a non-comercial version, maybe he will make it public ... | ||
| Ged Rating: N/A |
Nebula-Electronics in the UK are making a "Capture and view 4 video and 4 audio souces simultaneously" PC card. I have no more details but may be of use to the stereoscopist when it's released? http://www.nebula-electronics.com/products/products.asp?class=Capture | ||
| M.H. Rating: N/A |
In need hepl with WEB camera testing. I am just evaluation witch one will be the best for stereoscopy but I can not buy all on the market. If anybody had any WEB cam availabe can you, pleseas tell me following: 1) What is the biggest resolution you can get and on what FPS ? 2) What is the CPU load during the camera visualisation and what CPU do you have ? 3) What is the image quality in comparion to e.g. digital photo at idencital resolution ? I need especialy data for the best available models to check whatever they can handlet the 12 Mbs USB 1.1 bandwith limit by some HW compression method ... Another question. Does anybody have experineces with USB 2.0 and FireWire WebCam ? They are produced by ADS Tech company ... Some other comapny produce USB2 cam (iBoot) as well ... | ||
| Peter Wimmer Rating: N/A |
I am using two Sony Firewire Cameras (not DV-Cameras) and get 640 x 480 at 30 fps uncompressed. This configuration can capture in real time, depending on codec and harddisk performance. I have written a DirectShow-Filter for synchronisiation and multiplexing and I get a maximal difference of 1/60 second. By the way, the cameras support zooming, the zoom value can be enterted numerically, not just a zoom-wipe, which is quite useless for stereo-recording. I am doing this work for my diploma thesis "Aufnahme und Wiedergabe stereoskopischer Videos" (Recoding and Playback of Stereoskopic Videos). I will publish the filter for free soon. There is also a Videoplayer capable of playing in many different stereo formats and it also supports 3D-DVDs (Slingshot IMAX DVDs). Some of my old projects can be viewed at pwimmer.gmxhome.de, in german only. | ||
| M.H. Rating: N/A |
Sounds like at least 4 groups are working on identical problem: David Sykes The real-time 3d people Peter Wimmer and me :-) In the combination with the new USB 2/ FireWare cameras it looks like it will be a well tooned and probably frealy availabe solution ... Peter - can you plese direct me to the Sony cameras specification ? Do you mean the ADS tech equivalnet (they use SONY HW as well) ? Another question to Peter: Does your player support direct playback of the DVD or only playback of individualy ripped VOB files in interlaced form ? What mpeg2 decoder do you use (if it is not a secret :-) ). Last question on Peter: Is your mixer based on the examples from IIPL SDK or did you made a development from zero ? | ||
| M.H. Rating: N/A |
Peter: I see that you are located in Linz .. Do you know the people working with the CAVE VR device there ? One year agou, I was experimenting with your CAVE device (electron densites force fields stereo vizualization) ... | ||
| Anonymous Rating: N/A |
Peter, everybody in the 3D-community is waiting for your free "Videoplayer capable of playing DVDs" and your soft for stereo 640x480 @ 30fps real-time capturing will be appreciated as well (at least by anyone that can buy two firewire cameras!) Thank you in advance! | ||
| Peter Wimmer Rating: N/A |
Well, here are some answers for Michal Husak: You can find more information about Cameras here: http://www.1394imaging.com/products/cameras/ I'm using two Sony DFW-VL500, university bought them for my work. Together, they cost 2600 EUR. When I looked for HDTV-solutions, I found no affordable cameras. 2x640x480 seams to be the reasonable priced maximum by now. Does anybody know betters cameras for stereo recording? Player supports direct playback of DVD using Microsoft DVD Navigator-DirectShow-filter. Supported decoders are PowerDVD and NVDVD (NVidia DVD). WinDVD-decoder-filter can't be switched to weave-mode (at least I don't know how) and can't be used. Currently, the player supports monoscopic, sidebyside, overunder and (almost) all anaglyph formats. Interlaced support will come soon (in worst case this summer). I have also worked on software pageflipping, with good results on Matrox G400, but its not included in the player by now. Eerything was developed from scratch, I used only samples from the Mircosoft DirectX-SDK. By the way, there are no secrets, I will even publish the sources, when I think they are 'pretty' enough. I don't know IIPL SDK, what is this? CAVE: I have already worked in the CAVE myself and developed CAVE-Tetris :-). The university homepage mentions your Mars-Conquest video for the CAVE, and I am interested in it, but I have not found the sources yet... Maybe you can mail them to me, so I can try it one day! To Anonymous: I hope I can offer a stable version in about one month. Current version is German, must do the translation first, too. | ||
| M.H. Rating: N/A |
Peter: IIPL SDK: Intel Image Processing Library. It was for long time frealy available from Intel WWW. This library contains the full source code of relatively well tooned video mixing Direct Show filter. The VEL filters in my picture are the SDK examples. Minor modification of this filter produce really univerzal synchronization/mixing component ... Both my work and David Sykes work are based on debbugng and modification of this Intel sample code ... Supported mpeg2 decoders: I did not probably cath something important during my coding ... The PowerDVD and NVDVD filters support only Overlay surfaces on the output. How can you do some post procesing in such situation ? I was thinking that a filter supporting non-Overaly data in nessary . Can you tell me something more about your solution ? According the CAVE sources: I will try to refresh my CAVE account on your system and transfer the codes to you. I hope I will find my passwd and loging information ... | ||
| Peter Wimmer Rating: N/A |
PowerDVD and NVDVD do NOT support only Overlay surfaces! Never had problems with them. Only Ravisent refuses to connect to my filter! | ||
| Peter Wimmer Rating: N/A |
I will think about using IIPL, but not für multiplexer but for anaglyph transformation. Multiplexing requires only CopyMemory as time-critical operation (as long as no colorspace transformation is used) and I hope Microsoft has implemented it quite fast. | ||
| M.H. Rating: N/A |
I am not using IIPL as well, but I us the vido mixing filter for witch was the full C++ source code given in the IIPL SDK ... I use this example without using the IIPL .dll for image manipluation (I use CopyMemory instead as well) ... According anaglyph - i was testing several codes in assembler to make them but to my big surprise a simple C code was ALWAYS working faster. The optimization routines in C++ complier are horrible good ... | ||
| M.H. Rating: N/A |
According decopmression .... You are right !!! Power DVD support non-overlay .. I was probably doing something wrong during the non-overaly connection testing ... Our DepthQ components looks cooperating with Power DVD decompresor good ... | ||
| Giorgio Bogoni Rating: N/A |
Peter, Nvidia tech support told me that NVDVD can be used in extended desktop mode using a dual-head graphic board. You say your player supports sidebyside stereo output. Can I hope to play directy a Slingshot IMAX DVD in a 1600x600 extended desktop mode (2x 800x600 videoprojectors for polarized spex)? Can I expect good results even with cheap not-genlocked video boards featuring Nvidia chipset? Would be cool!!! Giorgio. | ||
| M.H. Rating: N/A |
Giorgio: I am sure it will work but there will be performace troubles. With DepthQ it works now ... Back to the original topic, I had found following horrible review on the Orange Micro USB2 iBot2 Web cam. Enybody some experiences ? PROS: tripod mount is good CONS: Does not do streaming video at all. USER COMMENTS: Buyer Beware. This product may work if you buy a USB 2.0 PCI card from Orange Micro as well but it doesn't work with motherboards that have USB 2.0 support already built in. The camera will not do streaming video and does a still shot about once every 30 seconds, not very useful. I contacted tech support and they admitted they have limited support for built in USB 2.0 motherboards. If Orange micro wants to sell this product then the USB 2.0 card should be included. Tech support advised me to return the camera. Dave T. | ||
| M.H. Rating: N/A |
Giorgio: I am sure it will work but there will be performace troubles. With DepthQ it works now ... Back to the original topic, I had found following horrible review on the Orange Micro USB2 iBot2 Web cam. Enybody some experiences ? PROS: tripod mount is good CONS: Does not do streaming video at all. USER COMMENTS: Buyer Beware. This product may work if you buy a USB 2.0 PCI card from Orange Micro as well but it doesn't work with motherboards that have USB 2.0 support already built in. The camera will not do streaming video and does a still shot about once every 30 seconds, not very useful. I contacted tech support and they admitted they have limited support for built in USB 2.0 motherboards. If Orange micro wants to sell this product then the USB 2.0 card should be included. Tech support advised me to return the camera. Dave T. | ||
| Giorgio Bogoni Rating: N/A |
Michal, I'm sure DepthQ it's the best solution out there for stereo-DVD playback but it's too much expensive for not-professional use. Maybe Peter can supply a PAL-resolution (720x576) solution for free and let us play with it! I don't expect performance troubles if the final sbs image is only 720x576 interlaced (standard DVD) stretched to 1440x576 (and fitting a 1600x600 extended desktop) during playback; in this way we benefit from standard MPEG-2 HW decoding. I understand that this setting uses only two side-by-side images 360x576 (that are 360x288 because they were interlaced) but horizontal stretching gives good results and, in this way, we play with the standard DVD bandwith. Giorgio. | ||
| Peter Wimmer Rating: N/A |
I think extended desktop should work. I have access to such a graphics board and will do some testings soon. Maybe I have to look that the window is automatically maximized over both screen and not only over one. Performance should by no problem over 1 GHz, except when the overlay does not work over two screens. Don't know if this happens. On my Matrox G400 the overlay does not work in interlaced mode (important for shtterglasses). | ||
| Peter Wimmer Rating: N/A |
Michal, is there a demo version of DepthQ available? What does DepthQ cost? | ||
| Gorgio Bogoni Rating: N/A |
Peter, let us know whenever you find the working HW. Everybody should be interested. | ||
| M.H. Rating: N/A |
Peter: Overaly does not work on any dual output graphic card I had tested (Matrox, nVidia, different Wildcats). This is the main perfomance problem I mention, not the source size. I will disuse with my boss the sending you a demo version of DepthQ ... | ||
| Anonymous Rating: N/A |
I've been told that the 3-head Matrox Parhelia can do this on the first 2 outputs ... | ||
| Peter Wimmer Rating: N/A |
3DTV (http://www.3dmagic.com/) also offers a computer-based stereo capture solution (SolidCam HD). They use 1024x768 resolution per eye, but only get 15 fps, not enough for smooth video, I think. | ||
| M.H. Rating: N/A |
Does anybody know about a camera without any storage device inside byt with DV (compreesed)out ? The DV compressed signal looks more easy manipulable than the uncompressd firewire signal ... | ||
| Peter Wimmer Rating: N/A |
Sony DXC-C33P, can be found in Image Control Solutions Catalogue. | ||
| M.H. Rating: N/A |
Peter: Sony DXC-C33P is a nice device, unfortunately the 5000 $ price a bit to much (especialy when we need 2 of them).... What about some simple normal size 1 CCD camera with DV out ? | ||
| Peter Wimmer Rating: N/A |
I don't know any other camera, but that means nothing, I have not really searched. You could use two cheaper consumer cameras and simply ignore the tape-drive. Why must it be without storage device? Is it because of size? | ||
| M.H. Rating: N/A |
Peter: I was naive. I was thinking that a camera without storage will be cheaper ... Yes, 2 consumer level camera will do the job ... But there is again problem with: 1) Electonic synchronization (focusing, shutter time ...) 2) Genlocking (not so critical) 3) Intelraced recording/progresive recording (we need progressive) | ||
| Peter Wimmer Rating: N/A |
Before I decided to use uncompressed firewire cameras I also though about this issues. As far as I know, simple control over firewire is possible (e.g. zoom near/far), but no absolute values are used. --> I don't know any solution! | ||
| M.H. Rating: N/A |
Synchronization could be achived for profesional DV cameras (JVC models) by proprietary interfaces ... But it does not solve the interlaced recroding problem again and it is price non-acceptable ... | ||
| NicolauRoig Rating: N/A |
some comsumer level Sony cameras (as my PC-100) allow to record in progressive mode with a simple trick: switching to the Photo-position (for still pictures) and recording the outgoing signal through firewire... Nico Roig | ||
| David Sykes Rating: N/A |
So, in Photo-position mode what framerate and image resolution can you get from a single camera ? | ||
| NicolauRoig Rating: N/A |
the same PAL framerate/resolution (25fps/720x576), but progressive instead of interlaced. (in NTSC cameras it should work) Nico Roig | ||
| Peter Wimmer Rating: N/A |
Be carefull! Usually, the progressive mode in consumer cameras does not capture 25 fps, but since it must output 25 fps, it doubles some frames. Result is jerky motion. |
