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Posted by Roberto on 04/23/07 13:16
I've just started doing some video editing. Is this a good group to
ask questions and get advice?
I live in R1. Recently purchased a multi-region Toshiba player and
hooked it up to my old HDTV. Bought some R2 DVDs and though they
display correctly they are sped up by the infamous PAL Speedup - so I
decided to get into video editing.
First off, the DVD player says it "converts" PAL to NTSC. For a 4:3
movie, it appears that it just converts the higher resolution PAL to
the lower resolution NTSC. Is that correct or is it possible that my
HDTV is doing the resolution conversion?
Step 1: Anyway, I used VLC to create a 6 GB MPG file from the R2 DVD.
That was fast.
Step 2: I then loaded it into VirtualDubMod. I selected the settings
to reduce the frame rate to 24 fps and to lengthen the audio signal
appropriately (i.e. slow it down). I also used a deinterlace filter
(is this needed since I'm not converting to NTSC?). What does Number
of Channels in the Audio Codec section do? I think I chose 1 though
the default might have been 2. Being low on disk space, I converted
into 10m chunks (the last chunk was 50m) which I would then convert to
the smaller MPG format followed by deleting the huge AVI files as I
went along since I only had like 60 GB of disk space. A 10m AVI chunk
is about 18 GB in size. Question: Can VirtualDubMod save as MPG
instead of the much larger AVI?
Step 3: I used Nero (which came with my DVD writer) to convert the 18
GB AVI files to 500 MB MPG files. Nero has two settings for quality -
I chose the higher quality and used the Export function. This
conversion is the most lengthy process. Should it really take an hour
or so to convert an 18 GB AVI to a 500 MB MPG?
Step 4: In Nero I "Made a Movie" splicing the 5 MPG chunks I had into
one and then burned that. This also took several hours it seems. I let
it run over night. The total movie size was 4.5 GB - now I have a DVD
that store 4.7 GB but Nero said it wouldn't fit at the current size
and would have to decrease the video quality. Why is that? Would I be
able to fit it on a DVD-9 or is that getting into complex territory?
The end result is not bad. I now have a PAL resolution DVD but the
movie is 24 fps and the PAL speedup is gone. Video quality is fine but
the image appears is a bit dark. Why is that? The image looked
brighter in VirtualDubMod. I could add a brightening filter I think
but why is it needed - all I did was convert the speed of the movie.
This whole conversion was a very lengthy process. The AVI to MPG
conversion and the DVD burning took much longer than expected.
What am I doing wrong/right? What can I do to speedup the process?
Thanks!
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