| Author | Message | ||
     gedburnell Rating: N/A |
I have found a new cheap method for converting field sequential 3D video on the PC to enable flicker free/reduced 3D. Instead of the above/below format a side by side format has proved to be successful. Starting with an MPEG-4 AVI F/S 3D video file. 1. Load the file into Virtualdub v1.4 available at http://www.virtualdub.org/index and select the de-interlace filter called "unfold fields side by side". You get as the filter suggests the left and right fields side by side. Then using Michal Husak's excellent program 'Win3d Stereoscopic video player' available at http://mysak.umbr.cas.cz/~husakm/Public/Win3dVideo/Win3dStereoscopicVideoPlayer.htm 2. Under 'Input Stereo Format' select 'relaxed or cross eye' 3. Then press view 3D You have Flicker free/reduced 3D video. This method is cheap as all the software is free as opposed to the Adobe Premier route. Let if know how you get on if you want to try this method. Regards Gerrard (England) | ||
| Alexander Oest Rating: N/A |
Hi Gerrard Sounds like an intersting solution. Especially for me, as I'm playing with displaying video via two projectors. My setup involves having a stretched desktop of for example 1600x600. When maximixing the video player (in this case not Michal's one, as i want to keep the two pictures side by side), left eye image is on the left projector and right eye's image on thr right. There's one thing I don't understand. You say you start with an mpeg4 file. Isn't the stereo information in the interlacing destroyed by the compression to begin with, then? I'd think it would only work when capturing directly through VirtualDub and de-interlacing in the process - which would take a very fast cpu. Alex | ||
| Giorgio Bogoni Rating: N/A |
Hi Alex, I agree with you. The only video compression I aspect to work is MPEG2 (setting "interlaced" flag) and, maybe, some MJPEG compressors. Yes, you'll need a fast CPU but a SCSI disk too and a large bus. But you can reduce frame rate (about 15 fps) .. you'll not miss frames (keeping a large image) even if you PC isn't fast enough. Are you using a dual-monitor grapich card to connect videoprojectors? And what about you capturing video card? Does it keep separate interlaced frames? Regard, Giorgio. | ||
| Alexander Oest Rating: N/A |
Aaargh. Just wrote a long reply, and I accidentally deleted it all before pressing post. I'm busy today, so I'll keep it short. Yes, I'm using an ASUS dual monitor card. I haven't tested it with projector - only with monitors so far, but it seems to work fine. I'm not sure about the capture card (and old asus 3800) keeping interlaced frames separate. I don't think I ever tried to actually capture interlaced stereo footage. Alex | ||
| gedburnell Rating: N/A |
Hi Alex, It's funny you should query MPEG-4 destroying the interlace information, I thought that too until I tried it! Let me assure you MPEG-4 doesn't destroy the interlace. Under 'File Information' in Virtualdub it describes my converted file as needing decompressor 'Microsoft MPEG-4 Video Codec V2'. So I take it my file is MPEG-4 Let me explain why I start with an MPEG-4 AVI file. My Sony TRV120e Digital-8 exports DV encoded video, but virtualdub will not accept DV format hence I need to convert the DV encoded AVI file into a format that virtualdub will accept. I first download the video into Media Studio Pro 6 via a Pyro 1394 Firewire card. Then convert the file into MPEG-4, MPEG-2 didn't seem to offer very good quality on my PC for some reason. I load this into Virtualdub and continue as I stated above. Let me know if you try my method. Regards Gerrard (England) | ||
| Giorgio Bogoni Rating: N/A |
Thanks for info Alexander. Gerrard, what you say about MPEG-4 is very interesting. I hope someone would explain us how MPEG-4 works and if there are any settings to preserve stereo interlaced images. |
