Rick
Just to make a clarification - the mpeg format defines something - such as
frame rate - and specifies where in the file that information can reside,
what the numerical limitations are, the number format, scaling, etc. The
camera software has to write its information into the video file according
to those limitations but the value of its frame rate can be whatever the
camera deems it ought to be. Same thing for other parameters, such as
compression. There are many ways to do compression even within the mpeg
standard. Cameras don't always use the best compression but whatever it does
use, it has to fully annotate all the necessary parameters so that the
decompression software can correctly process the file. The GOP and B and I
frames all have to be identified in a way the decompress software can
decipher, etc.
The point is that saying a video is "Mpeg II" doesn't by itself say much
about the file; the software has to look inside of each specific Mpeg file
to see what is really there. Every camera mfg. makes their video a little
different (sometimes for capacity or quality reasons, sometimes for royalty
payment reasons). Most of the formats you see in Premiere under other names
such as AVCHD are Mpeg or mpeg derivatives even if they've given them
proprietary file extension names. Premiere goes to great effort (Adobe works
directly with the manufacturer, they don't do "reverse engineering") to
write its input software to be able to recognize various camera files, and
to be able to re-write those files according to defined common denominators.
Again, hoping this helps.
Lee
From: [email protected] [mailto:[email protected]]
On Behalf Of Rick
Sent: Tuesday, January 01, 2013 9:56 AM
To: [email protected]
Subject: [AP] Premiere to Encore Question
Hi everyone,
I am flummoxed by a circumstance when bringing a video into Encore from
Premiere. For instance, the original video is an Mpeg II, 720 * 480.
When I bring it into Encore it exceeds the safe margins and cuts the sides
off when presented on TV. But, if I bring it into Premiere first, adjust its
size to within the constraints of safe margins, render, and then import to
Encore, it fits perfectly. Both videos are the same format, at 720 * 480. I
can't figure out what is different about the two videos, considering all
parameters appear to be the same, even after rendering. Anyone have the
answer?
Also, how can I do a batch process to convert the videos to safe zone
compliance? Thanks for your time and knowledge.
[Non-text portions of this message have been removed]
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