User Guide
Contents
1. for the Risc PC User Guide Computer Concepts Ltd Gaddesden Place Hemel Hempstead Herts HP2 6EX Tel 01442 63933 Fax 01442 231632 EMail Info CConcepts co uk Computer Concepts Ltd 1994 Manual issue 1 0 First printing October 1994 All rights reserved No part of this publication hardware or software may be reproduced or transmitted in any form or by any means without prior permission of Computer Concepts Ltd Such written permission must be obtained before any part of this publication is stored in any form in a retrieval system of any nature Computer Concepts Ltd have no direct control over the use to which this product is put and therefore offer no warranty implied or otherwise relating to its use for any purpose other than that for which it is intended The product described in this manual is the subject of continual development and while all efforts are taken to ensure that the information given is correct Computer Concepts Ltd cannot accept any liability for any loss or damage resulting from the use or misuse of this product Trademarks Movie Magic is a trademark of Computer Concepts Ltd Acor Replay ARMovie amp Risc PC are trademarks of Acorn Computers Ltd All other trademarks are acknowledged Contents 1 Introduction Welcome to movies on your computer About this manual How MPEG works CD standards Green Book amp White Book Nanananana 2 Installation What you should have receive2. 1 Introduction Page 2 So the image is compressed using a combination of several different techniques For example only changes between consecutive frames need to be stored As a result MPEG movies require only 150KBytes storage per second A CD can now hold 70 minutes of movie The drawback is that special hardware is needed to compress and decompress the data Compression is far more complicated than decompression It requires specialised and very expensive hardware MPEG compression on your computer is not possible Decompression is less complicated but still requires special hardware such as that on the Movie Magic card CD standards Green Book amp White Book There are two standards for movie CDs usually referred to Green Book and White Book So named because of the colour of the outer covers of the two specifications Green Book is the older standard and was originally developed by Philips These CDs are usually marked Digital Video on CD i You are unlikely to find new Green Book CDs on sale White Book is the more common standard These CDs are often marked VideoCD Since July 1994 all new releases are White Book standard Many older titles originally released as Green Book CDs are being re issued as White Book CDs Movie magic can handle movies to either standard However some types of CD ROM drives cannot handle Green book standard and so cannot read CDs in this format Please note that this is a feature of
3. Movie Magic plays CDs with the i icon Page 7 3 Playing a movie 3 Double click on the CD icon to display the contents This is an example CD ROM the exact contents of your CD ROMs will be different 4 Usually there is directory with MPEG MPEGA Vin this example in its name Open that directory 5 Double clicking on a file opens a window showing the ARMovie icon 6 Drop the ARMovie icon onto the ARPlayer icon on the icon bar This displays the movie title in a window on your usual monitor 7 Click the Play button on ARPlayer to start playing the movie on the monitor plugged into the Movie Magic card If you pause the movie during playing the current frame appears on both the Movie Magic monitor and in the ARPlayer window Grabbing a screen image ARPlayer can freeze frame the picture You can then use GrabM PEG supplied on the Movie Magic disc to grab the IGrabMPEG image as a 24 bit sprite Many applications such as DTP and drawing packages can display and manipulate sprites Note Most CDs are covered by copyright Some uses of grabbed images can breach copyright If in doubt you should take suitable legal advice before publishing or distributing grabbed images Computer Concepts are not lawyers and so cannot advise you Page 8
4. the CD drive and not Movie Magic Installation What you should have received Check that you have received the following e Movie Magic expansion card e floppy disc e monitor cable e registration and movie request card If any of these is missing contact the supplier of Movie Magic What else you require e A CD ROM drive and SCSI interface installed in your Risc PC A 50Hz PAL monitor with RGB input Suitable monitors are older Acorn compatible monitors such as Acorn AKF11 Eizo 9060 or a domestic TV with a Scart connector If your monitor has only composite video input contact Wild Vision technical support at 15 Witney Way Boldon Business Park Boldon Colliery Tyne amp Wear NE32 9PE telephone 0191 519 1455 fax 0191 519 1929 Movie Magic is supplied with a Scart Scart cable If your monitor does not have a Scart connector you need to purchase a suitable cable Page 3 2 Installation Installing the Movie Magic card 1 Switch off your computer Unplug all peripherals plugged into the computer 3 Remove anything from the top of the computer such as a monitor 4 Remove the top cover of the computer This operation is described in the Welcome Guide supplied with the Risc PC 5 Remove the blanking plate covering the slot you want to use Don t lose the securing screws W Expansion card slots Caution You can plug the Movie Magic card into any free slot If you want to use the bottom slot in a
5. d What else you require Installing the Movie Magic card Testing the Movie Magic card Installing the software ankwWW Ww 3 Using Movie Magic Suitable applications for playing movies Playing a movie Grabbing a screen image oNNN Introduction Welcome to movies on your computer Many popular movies and educational programs are now being released in CD ROM format as well as VHS video Some titles are only released on CD ROM CD ROMs offer many advantages over video such as better quality and easier access to any part of the contents Data on movie CDs is compressed using a format ealled MPEG There s more on MPEG later MPEG is a very efficient way of compressing a movie but requires special hardware to deeompress the data This special hardware is provided by the Movie Magic card The decompressed movie is then played using the standard Acorn application A RPlayer to a monitor connected to the socket on the Movie Magic card About this manual It is assumed that you have a basic knowledge of the RISC OS conventions and are familiar with standard applications If this is not the case we suggest that you first read the Welcome Guide supplied with the computer How MPEG works MPEG stands for Motion Picture Expert Group To display flicker free pictures on screen requires data rates of 10MBytes per second If you stored this amount of data without any compression a minute of video would fill an entire CD Page 1
6. gic disc 1 Run Rinstall from the Movie Magic floppy disc Page 5 2 Installation Directory path name 2 Usually Rinstall automatically finds ARMovie and displays the directory path name in the window If this field is blank drag the ARMovie icon onto the window 3 Click Install to install the software within ARMovie Bis A 4 Copy GrabMPEG into a suitable directory on your hard disc Ira 5 You can now plug the monitor into the Movie Magic card Playing movies is described in the next section Installation is now complete You do not need the floppy disc to use Movie Magic we recommend storing it in a safe place Page 6 Using Movie Magic Suitable applications for playing movies Movie Magic can use the Acorn application A R Player This application is described in the User Guide supplied with the Risc PC Alternatively you can use any Replay aware application Playing a movie This describes playing a movie from a CD ROM You can play MPEG files from other sources in the same way As described in section 1 there are two standards for movie CDs white book and green book Movie Magic can process both standards but some CD ROM drives cannot read green book discs 1 Load ARPlayer This is usually in the A pps directory Alternatively you can use any Replay aware application 2 Load the movie CD into the CD ROM drive The CD icon on the icon bar shows the type of CD Normal CD PhotoCD VideoCD
7. slice the slot with the guides note in older Risc PCs these guides are covered in conductive paint which can cause short circuits on any expansion card in this slot We recommend sticking insulation tape or similar on the guides before plugging in an expansion card Expansion card slots Insulate these quide surfaces 6 Support the backplane the vertical circuit board with one hand 7 Plug the Movie Magic card into the computer Make sure the card is fully plugged in Page 4 2 Installation 8 Secure the Movie Magic card to the case of the computer 9 Replace the computer s lid This operation is described in the Welcome Guide supplied with the Risc PC 10 Reconnect any peripherals you removed in step 2 Testing the Movie Magic card 1 Switch on your computer Let it complete its boot sequence 2 Press F72 This exits the normal desktop and enters the command line A prompt is displayed 3 Type PODULES and press Return This lists the expansion cards plugged into the computer In the list should be Movie Magic If Movie Magic is not listed e check the card is properly plugged into the backplane e try the card in a different socket If neither of these work contact the supplier of Movie Magic 4 Press Return again to return to the desktop Installing the software Movie Magic uses a standard Acorn resource ARMovie to play movies However ARMovie must be updated with the MPEG extensions from the Movie Ma
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