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Supplement for: Digital Video


The Digital Video Plug-In provides a method for playing MPEG full motion video in a CD-i title created with MediaMogul.

Plug-ins required for operation:

cdi_sgmn - The "Signal Manager" plug-in.
cdi_dvpl - The "Digital Video Play" plug-in. Allows playing of digital video.

MediaMogul Utilities required to prepare assets:

available as part of script2disc, in order to work.

If you are using a Philips development CD-i player and/or an OS-9 Emulator, you will need to create a master script for converting each .mmd/.mpg file to an .rtf file (Example script) and also to build a disc image (Example script). Then a disc must be written prior to Simulation.

Assets to create before using plug-in:

NOTE: For additional information on creating MPEG .rtf files and on building a disc image of these, see "Preparing MPEG for MediaMogul 2.2 Applications", available from pmpro Professional Support. You can also consult the pages immediately below:
Error message anomalies with the Philips MPEG Verifier
VCD-Compliant MPEG files:FAQ & specs
Comparison table of MPEG1 Specs in VCD & CD-i

Special preparations:

No additional preparation required.

How plug-in works:

· You should call the digital video plug-in, cdi_dvpl, in TEST mode early in your title. The plug-in will check for the presence of a digital video card, and set the Z variable to 500 if none is found. Then have a Br_ifeq_nr if Z is 500 to a script that alerts the user that the title requires a digital video card.

· Calling the digital video plug-in will automatically start the signal manager plug-in, cdi_sgmn, so make sure you do not call this more than once.

· Digital Video is displayed on the background video plane in CD-i. The foreground video planes must be made transparent, either partially or completely, in order for it to be seen. Use the DV_Transp video command to set up the type of transparency you want, and then use a Cut, Curtain, or Wipe video transition with the DV checkbox checked to establish the defined transparency once decoding of the digital video starts.

· After the digital video has been played, you must turn off the transparency that had been established by using a Cut, Curtain, or Wipe video transition without the DV checkbox checked.

· If you want to change transparency parameters, e.g. go from a CLUT 0 to a matte transparency, or vice versa, you must first turn off the existing transparency before establishing the new one.


In the following example, the digital video plug-in is called in TEST mode to check for the presence of a Digital Video card. Then an entrypoint file is loaded and a 9 second portion of MPEG is played at full screen CLUT 0 transparency with a hidden, toggleable menu.

00:00 Skip_off
(Skip off ensures that the user cannot skip over anything required for the plug-in.)
00:00 Call /h0/SUBROUT/cdi_dvpl TEST
(Check for presence of a DV card.)
00:20 Br_ifeq_nr /h0/SCRIPTS/nodv.scr Z 500
(Branch if no DV card present.)
00:20 Br_always_nr /h0/SCRIPTS/playdv.scr

00:00 EPLoad /h0/DVFILES/mympeg.mm
(Entrypoint file is loaded.)
00:00 DV_Transp ck3/HIDE 0 0 0 0
(Transparency is defined.)
00:20 DV_Cut /h0/VIDEO/dvmnufg.cl7
(Foreground image is loaded and transition defined)
01:10 Background /h0/VIDEO/dvmnubg.cl7
(Background image for menu is loaded.)
01:10 Menu /h0/MENUS/dv.mnu
(Menu is loaded.)
01:10 Call /h0/SUBROUT/cdi_dvpl /cd/DV/mympeg.rtf INTIME=00:00:01:15,OUTTIME=00:00:10:15
(Digital video is played.)
01:10 Cut /h0/VIDEO/mystill.cl7
(Transparency is cleared.)
01:10 Br_always_nr /h0/SCRIPTS/nextscr.scr

NOTE: Times in the above example are approximate.

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