[CALUG] CALUG Digest, Vol 48, Issue 16

[Duane Tucker]

Hi Walt,

I can't really answer your questions regarding re-encoding .mov files to 
.mpg, but I do know a thing or two about DVD's. You are correct that a 
true dvd video disc has a lot of structure to it. If you're interested I 
can pull old specs out to describe exactly what all those directories 
and files contain. The DVD spec does provide that all DVD players must 
play both mpeg1 and mpeg2 files (if, of course, all the other structure 
is in place). The good news is that pretty much all CD/DVD burning 
software will create the correct DVD formatting these days. I'd be 
shocked if there weren't many freeware tools out there to do the same 
job. Additionally, many DVD players are designed to recognize and play a 
regular CD or DVD containing jpeg or mpeg or even mp3 files and just 
play them. That is, as mentioned, a model-specific feature. And by the 
way, mpeg2 is very good quality, mpeg1 not so much unless encoded at a 
very high rate.

Duane



On 12/28/10 12:00 PM, calug-request at unknownlamer.org wrote:
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> Today's Topics:
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>     1. christmas questions !! (Walt Smith)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 27 Dec 2010 15:33:52 -0800 (PST)
> From: Walt Smith<waltechmail at yahoo.com>
> Subject: [CALUG] christmas questions !!
> To: "calug at unknownlamer.org"<calug at unknownlamer.org>
> Message-ID:<110197.85282.qm at web120005.mail.ne1.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> hi all,
>
> yup, its that season... where we all need info
> on how to do photo and movie stuff on linux.
>   I (think) I have a couple simple Q's on movies.
>
> I have some pix, but worse, I have some home movies
> on a digital camera.  I see they are in .mov format.
> I can D/L and view in totem.. but by GOLLY are they slow
> in playing on a 2.8 ghz 1 g ram machine..  mplayer does
> a better job.  gnome-mplayer works as slow as totem.
>
> but wait, I did some homework.  I have mplayer and mencode
> installed.  Haven't spent years yet examining the man pages..
> But google tells me how to make a .mpg file from .mov files.
> A big improvement in file size and especially play speed!!.
> Now, before I become too goood at this:
>
> I think I'd like the option of saving .mpg or varient files to
> CD (I have a few oldies, will get DVD's later ).
>
> problem statement:
> 1.
> I would guess I can save .mpg files and any DVD player will show a
> file structure and I can play them, right ?  Would AVI be "better"
> from a user sense (I'm not doing HD)? ( does mencoder do .avi ? )
>
> 2.
> I see from my DVD of Flash Gordon that it has .ifo, .bup,  and
> .vob files, where .ifo's are "indexes" and .vob are "chapters"
> ( or some such division ). Can mencoder make a .vob file? or is
> that more in the realm of DVD editing ?  ( which I won't do )..
> I think being able to simply plug in the CD and have it auto-
> start is sometimes desirable. Which is why I asked...
>
> 3. where is the option to downconvert a .mov to say, 640 x 480
> ( as it converts to a mpg file, just in case I happen to record in
> some HD for practice ).  yes, I know the mpg format might look
> crappy.  Perhaps I should do some intermediate convert from .mov
> before doing the final file ?
>
>
> thx,
>
> Walt ........
>
>
>
>
>
>
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> End of CALUG Digest, Vol 48, Issue 16
> *************************************
>