[MacDV] Re: Super VCDs

[Thubten Kunga]

From: "Dennis R. Cohen" <drcohen at mac.com>
Date: Sun Feb 9, 2003  2:11:48  PM US/Pacific

There is one thing you might want to correct, and that's the amount  
that will fit
on a 700MB CD. As I point out in the book (both first and second
editions), there are two size ratings on CDs for a reason, e.g. 700MB &
80 minutes.

CDs are divided into a fixed number of blocks, each of which holds 2352
bytes. When used to store computer data (this is called Mode 1 Form 1),
only 2048 of those bytes are used for data, the rest is for
error-checking or unused. CD-DA, Video CD, and SVCD use Mode 2 Form 2
packet writing, which uses 2324 of the 2352 bytes available. For this
reason, you'll actually write more than 800MB to the disc when writing a
VCD, SVCD, or audio CD -- that's where the 80 minute part comes in...80
minutes of CD-DA audio or MPEG-1 video.

--Dennis

On Sunday, February 9, 2003, at 01:28  PM, Thubten Kunga wrote:

> ffmpegXv0.0.6f Installation and Operation Tutorial by Kunga part 1
>
> I spent a lot of time getting this ffmpegXv0.0.6f working this  
> morning. Link to it is at the bottom of this message. I thought I'd  
> share how to install it with everyone just in case you run into the  
> problems I did. It works beautifully if you get it configured  
> correctly. That is the trick.
>
> 1. The download that you get from  
> <http://homepage.mac.com/WebObjects/FileSharing.woa/wa/ 
> default?user=major4&templatefn=FileSharing1.html&xmlfn=TKDocument.1.xml 
> &sitefn=RootSite.xml&aff=consumer&cty=US&lang=en> is not all you need  
> to download.
>
> 2. You also must download from this link which activates an auto  
> download when you get there.
> <http://prdownloads.sourceforge.net/mplayerosx/ 
> lastbinary.sit?download> Unstuffit.
>
> 3. You mount (if it didn't auto mount) the ffmpegX_0.0.9f.dmg-link.dmg  
> disk image
>
> 4. I copied the entire disk image to my Applications—>Video  
> Applications Folder (option drag to prevent an alias only copy).
>
> 5. Put the last binary 090203 Folder in that new ffmpegX folder as  
> well.
>
> 6. Download the text file "mpeg2enc" which comes in as "mpeg2enc.txt"  
> from <http://mjpeg.sourceforge.net/MacOS/>
> (option-click the link and choose "Save link on the disk")
>
> 7. Put it in the ffmpegX folder too.
>
> 8. Run the ffmpegX engines installer where you press locate buttons  
> for "mpeg2enc.txt" first, then the other two which are inside the last  
> binary 090203 folder. Then press Install and watch the Terminal  
> program ask you for your password and hit return and watch for the  
> words "Installation Successful".
>
> 9. Now you are ready for the easy part: Encoding your first SVCD file.  
> Launch ffmpegX0.0.6f and pull down at the bottom where it says "Quick  
> Presets" to "SVCD (NTSC)".
>
> 10. At the top press the "Open..." button and choose your iMovie 3  
> Full Quality DV Export file.
>
> 11. Right under that press the "Save As..." button and give your SVCD  
> file a name.
>
> 12. Press the "Encode" button in the lower right corner of the  
> interface box.
>
> 13. Watch and wait for ffmpegX0.0.6f to generate any number of files  
> that ultimately get recombined into one final .mpg file that is your  
> final MPEG2 movie ready for Toast.
>
> You can play this file with Vic (someone please help with the URL for  
> Vic) or, if you have the $20 MPEG2 addition to QT6, QT Player will  
> play it as well.
>
> Next step is to assemble several of these SVCD files in the brand new  
> 1.1.1 (Feb 4.03) VCD Builder. <http://homepage.mac.com/johan/>
>
> Then that multi movie assembly (like iDVD Free) gets burned with Toast  
> in the Other—> Multitrack CD-ROM XA format.
>
> I got a 14.5 MB movie from a 159.5 MB Full Quality DV Export file with  
> my first test of the old 47 second iMovie Tutorial set of clips of  
> Matty and the Kids. Now that's effeciency. Extrapolated out it's about  
> 20MB per minute or 35 minutes on a 700 MB CD-R/RW.
>
> But the content of your video will result in different times because  
> it's a variable bit encoder. So long speeches will fit with more time  
> than an action video with lots of changes.
>
> End of Part One.
>
> Kunga at FutureMedia.org writes:
> ffmpegX just went to 0.0.6f.
>
> <http://homepage.mac.com/WebObjects/FileSharing.woa/wa/ 
> default?user=major4&templatefn=FileSharing1.html&xmlfn=TKDocument.1.xml 
> &sitefn=RootSite.xml&aff=consumer&cty=US&lang=en>