 MPEG-2 or AVI DV?
"Tony Morgan" wrote in message
...
In message , John Russell
writes
"DG" wrote in message
...
What are the benefits of AVI DV over MPEG-2, if any?
I am looking for a new camcorder and see that MPEG-2 format recordings
are
creeping in. Is there any particular reason?
How about editing? Are there any practical differences in the two?
Thanks.
DG
MPEG-2 is a broad "standard". DV AVI uses MPEG-2 but without incremental
frames.
I would disagree with that. AVI is simply a container. If a file is
described as DV AVI, then it is an AVI file containing DV. You could have
an AVI containing MPEG-2, in which it would be described as MPEG-2 AVI . A
very common type of AVI (used extensively in distributing pirated movies)
is DivX/MP3 AVI - just subscribe to alt.binaries.movies.divx to
illustrate.. You also see MPEG-4 AVIs in the pirated movie groups.
Provided that you have something like the ACE codec pack installed,
AVI2DVD will convert *any* AVI file to separate MPEG-2 video and AC3 audio
streams (files). AVI2DVD also (if so configured) will create an ISO file
containing the BUP/IFO/VOB DVD file structure.
DVD camcorders also use MPEG-2 but to the DVD Video Specification.
Only half the story. DVD camcorders use MPEG-2 video with interleaved AC3
audio (these are VOB files). Because of the way that the AC3 audio is
interleaved with the MPEG-2 video, splitting out the audio presents
problems, but the AVI2DVD program mentioned above does split out the
MPEG-2 (using a filename extension of M2P) and AC3 audio streams leaving
them in a temp folder.
Now most people using a Dv camera will end up producing a DVd -video MPEG2
at the end to create a DVD. For the best quality they will use twin pass
transcoding, and for the most part that will be better than direct MPEG2
capture which obviously can't do twin pass.
I cannot see that. Because VOB files are MPEG-2, there is no "transcoding"
as you put it. If the MPEG-2 isn't "transcoded" (again as you use the
term) then there will be no deterioration in quality from the original
MPEG-2.
--
Tony Morgan
Please ignore this post!
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