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Text File | 1995-07-23 | 2.4 KB | 45 lines | [TEXT/SPM ] |
- The MPEGSplitter that comes with this version of Sparkle can now handle
- CDI disks. However I have only just added this and it is not perfect.
-
- The problem with CDi disks is that the data format of the MPEG files on
- the disk makes use of sectors with extra padding that have to be removed
- before the file can be decoded. QuickTime 2.1 contains a Data Handler
- component that does this, so this readinf of CDI disks will only work on
- systems with QuickTime 2.1. You'll have to wait until that is released.
-
- The next problem is finding out which is the MPEG file. The one and only
- CDi disk I have has a bunch of files on it, but the two that are MPEG files
- have a suffix of .DAT. Because of that, I have set the MPEGSplitter file
- filter to accept files with a suffix of .DAT.
- However suppose you have a CDi disk with a file on it with a different
- suffix, say .MVX. The MPEGSplitter will not recognize this suffix and will
- not disply the file in the Open File dialog box. So you have to tell me
- if there are alternative suffixes out there for CDi MPEGs.
- The alternative to this is to allow files with any suffix to appear in
- the File Open dialog box but that's nasty because the dialog box becomes
- cluttered with junk.
-
- The third problem is that you'll be splitting these files to a hard disk.
- You may want to have up to a gigabyte free. The MPEG video part will
- probably take about 400MB. The MPEG audio will be about 80MB which will
- expand to about 500MB when you turn it into an AIFF file. The good news is,
- of course, that disks are cheap---a GB should cost you about US$350.
- The splitting may take two or three hours during which your mac is useless
- for anything else so don't try this when you're impatient to do something
- else.
-
- Once you have your video and (optionally) audio you can view with Sparkle.
- The index building will take five or ten minutes, but
- only has to be done once. Then the text track is built, about a minute, and
- then you're set---you can play your video.
- CDi quality is MUCH better than any other MPEG I have seen. However it seems
- to posterize a lot more on a 16bit screen than net MPEG video.
-
- The most serious problem is that the MPEG audio seems be set at a time offset
- from the video and so when playing the result is a serious disparity between
- them---a lag of maybe a minute. With luck I'll find a way to fix this in
- the next release.
-
- Many thanks to Frank Hauptmann who sent me a CDi disk giving me something
- to experiment with to get this to work.
-