[MacDV] Re: SLIDE SHOW

[Steven Rogers]

On Friday, February 7, 2003, at 12:49 AM, Thubten Kunga wrote:

> OK. I am 100% ignorant about the word and process called "demux". I 
> now have both those programs — bbDemux1.2.2 and Extractor. I am 
> clueless as to how to use them when and where in the process of 
> editing. And once I have split everything up into I have no clue what 
> format, how and when do I put them back together again. This is not 
> Humpty Dumpty is it?

the reason you would split them up is because MPEG is a fairly new 
format and because of the compression and newness, most editors don't 
handle it well. If you start with an MPEG file and export it from QT, 
you get a video file without sound. QT can't convert the video and 
audio simultaneously from MPEG to another format. So you have to split 
them, do whatever conversions or manipulations you want, and then put 
them back together.

For example, you can convert the MPEG video to a DV stream for iMovie 
(or just drop it in iMovie 3) but you'll have a movie with no sound. 
Then you take the demuxed audio file (wooo - that word again), convert 
it to AIFF or MP3 and throw it into the sound track of iMovie, and 
you're ready to edit.

The "MUX" term is an old engineering term for sending multiple signals 
over the same wire - multiplexing. Calling an MPEG file "muxed" is 
really abusing the term, kind of like "cable modem" which really isn't 
a modem at all - but its a decent analogy.

SR