----- Original Message -----
From: Amit Dogra
To: [email protected]
Sent: Monday, December 27, 2004 11:56 PM
Subject: RE: [AP] AVI to DVD
Hi Jeff,
Thank you very much for this useful information. It seems you are an expert
in video editing. I hope i dont annoy you by asking silly questions coz i'm
very new to this editing world.
As i said before i'm using Adobe Premiere Pro 7.0 and when i select File -->
Export --> Adobe Media Encoder it gives me several option:
MPEG1
MPEG1-VCD
MPEG2
MPEG2-DVD <<<------BINGO!
MPEG2-SVCD
Quick Time
Real Media
Windows Media
I wanna know which option should i select in order to prepare content
suitable for buring a DVD that can be played on set top DVD player. If
MPEG2-DVD is the option you were referring to in your mail then which sub
option should i pick from this list:
PAL DV High Quality 4MB VBR 2 Pass
PAL DV High Quality 7MB CBR 1 Pass
PAL DV High Quality 7MB VBR 2 Pass SurCode for Dolby Digital 5.1
PAL DV Low Quality 4MB CBR 1 Pass
PAL Progressive High Quality 4MB VBR 2 Pass
PAL Progressive High Quality 7MB CBR 1 Pass
-----Amit, the first thing I want to address is the concept of "two-pass
encoding".
The software makes a first pass and does some pre-calculating with regard to
things like "motion estimation" and "scene changes" (plus a few other things
that I am just learning about).
Two-pass takes longer but for obvious reasons it is the better choice.
Variable bit rate is...again, the sort of thing that can be used to address
area with lots of fast motion. Motion is the sort of thing that tortures an
MPEG codec, so variable bit rate allows the bit rate to be adjusted in order to
maintain picture quality.
In compression, bit rate is "almost everything".....and some folks say that
it IS EVERYTHING. One thing is for sure, the more BITS you have the more detail
you can express, but a bit rate that is too high can cause the file size to be
too big for the blank disc you are working with and since you are working with
"burned media" it can also cause problems with both the blank disc AND the
PLAYER.
Some brands of blank media can sustain very high bit rates and some cannot.
Different people have different opinions on this because they have arrived with
the perfect combination for THEIR COMPUTER and
THEIR BURNER and THEIR PLAYERS. Careful research in other forums that
specialize in DVD burning will help you arrive at the combination that works
best for you.
I personally have the best luck with MEMOREX and SONY DVD+Rw discs, but as
the old saying goes...."YOUR MILEAGE MAY VARY".
If you go "ALL THE WAY TO THE WALL" and select something outrageous like 8MB
and burn it at 4X or 8X there's a chance that either your blank media wont
handle it or that your player will freak out at the bit rate or that the error
rate will be too much at such a fast burn speed.
On the other hand, if you select two-pass encoding and a 7MB variable bit
rate and burn it at 1X or 2X on very good blank stock you might have no trouble
at all, providing that you can fit your entire video on one disc at that bit
rate. Remember, you only get 4.3 gigabytes on every "4.7 gigabyte" disc so your
project has to be 4.3 GB or less INCLUDING your menus and other graphics which
take up "OVERHEAD".
This is why the Adobe Media Encoder has different selections and bit rates.
The best encoders will let you MANUALLY select ANY BIT RATE that you type in
but the rates listed by Adobe are fine.
(I once found a project that needed a high bit rate to maintain top quality
picture but the 7MB rate made the file too LARGE. The encoder I was using
allowed me to select 6.780 mbps and it was very close to 7 mbps and it allowed
me to reduce the file size so that it just fit the disc perfectly.
* I'm in India and we have PAL system against NTSC of USA and other
countries. "Against"?? ("Can't we all just get along?")
All this is so confusing to me and i'm not able to select a proper option. I
understand these options have different meanings and purpose but i just wanna
select the most general kind of option out of these.
---Afraid there's no such thing as a "general option" at all, only options
that "best fit" the needs of the piece and the hardware and software used.
Don't be afraid to experiment with other DVD encoders out there.
I am far from being an expert at DVD encoding. I've been editing for over
twenty-five years and doing nonlinear for almost eight years steady (on and off
in the past when it was in development).
I am just now learning the finer points of encoding and there's still a lot
that I do not know and I cant imagine what I would do without some of the other
people on the list WHO ARE the experts.
Please let me know how your project turns out.
JeffH
Ch.S.
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