>> Saturday, February 9, 2008
Does anyone has some experience with capturing video from a cd-i player? (And I don't mean filming the television screen with a video camera, or using cd-i emulator or something... ). RDJNL recently posted some interesting results now he bought a device with RCA and S-Video input connections which connects to his computer via USB. That could mean videos are coming up at his own CD-i website: CD-i is Great! Anyway, there are still some problems. RDJNL: "I connected my cd-i player to it. I tried a few different freeware / shareware video capturing software tools and several cd-i games, but I couldn't get it to work... Until I tried 'The 7th Guest'. The strange this is, I can't capture or preview the cd-i start up screen nor the bumpers, but when the actual game starts, it suddenly does work. I wonder why. Is there anything special with this game? What other games are likely to work? Why don't they all work? What can i do, if anything, to get them all working? Why can't I capture the cd-i startup screen? By the way, I also connected my Playstation 2, and capturing works. Is there some difference in input signal or something?
Broadcast studio technicians have told cdifan that the video output signal from a CD-i player (well, at least a 605) is nowhere near the PAL standard. To get it suitable for broadcasting required interposing a frame store. This is a device that "captures" video frames digitally and then encodes them back out into a video signal, usually used for frame rate conversions. For the 7th guest issue, my guess would be that the DV cartridge has its own video generator that kicks in when MPEG starts playing. Perhaps the same thing happen with other DV titles. It could also be that the video output is switched to interlaced (this is normally off) which causes a subtle difference in the timing of the sync signals. Also, white-book capable DV cartridges (all except the very oldest ones) will switch video timing when a video-cd (or something that seems like one) starts playing, but The 7th Guest doesn't trigger this unless they've used very low-level trickery (there is no API call to do the switching). Also it might vary between types, as each Digital Video Cartridge has different video connections: the large cartridge use an analog video signal, the small one uses a digital one.
"The home screen of a lot of CDi players doesn't output PAL 50 Hz . I believe it is more or less PAL 60Hz. Any normal PAL TV can handle PAL-60, but a lot of capture cards/devices cannot (sometimes because of software settings, and sometimes it is a hardware problem)", according to XCLTempesT.
More when it develops.