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Wednesday, February 28, 2001
Just so everyone knows, I'm going to be on a break starting this
weekend, so that's when I plan on updating the site.
Tuesday, February 20, 2001
Today I made some significant changes to the Low
Resolution Video Processing section of my guide. It now covers a much
wider variety of video formats. For example, I added information on
processing a video for VCD format and integrated the steps for processing a
PAL/SECAM video. Because of this, I also modified the NTSC
Vs. PAL/SECAM page to be more of an informational article, rather than a
how-to page. Finally, I made a number of minor updates to several other
pages.
My next task will be to create the high resolution video
processing section. Now that I've updated the low resolution processing
section, it should be much easier to create the high resolution section.
I'll try to write it up and put it online as soon as possible. As usual,
feel free to contact me with any concerns you have.
Saturday, February 10, 2001
I'm sorry I haven't made any updates recently. I've been
very busy with school and other things. Rest assured that I am still
working on the site, such as running tests on filters for processing high
resolution video. When I find the time to do some writing, I'll try update
the site a bit. In the mean time, you can contact
me if you have any suggestions.
Sunday, February 4, 2001
Okay, I've finally finished the section about High
Resolution Video Capture. I also updated the section on Low
Resolution Video Capture and added a useful Video
Capture Overview. In addition, I made a load of updates to other
sections of the guide. This includes information about horizontal
resolution in the High Vs. Low Resolution Capture
article, sample frame grabs of NTSC telecined
video in Part 1 of my Telecining article, and a
bunch of other minor updates.
Please note that while my guide now includes instructions on how to capture high
resolution video, I have not yet added sections about processing or encoding
high resolution video. I will add this information in the (hopefully) near
future.
Saturday, February 3, 2001
This is an important update for anyone who uses an MJPEG
codec. After doing some testing, I've found that there is a problem in all
the popular MJPEG codecs when capturing in YUY2. Basically, all the MJPEG
codecs that I'm aware of (PICVideo, MainConcept, and Morgan Multimedia) deal
with YUY2 data in a different way than VirtualDub and other video codecs, such
as Huffyuv. This leads to an image with washed out colors when capturing
in YUY2.
I've been talking with Jim Bean at PICVideo, and he has confirmed
the problem. The people are PICVideo are currently working on an updated
version of their codec to fix the problem.
In the meantime, you can work around the problem by capturing
with MJPEG in RBG24 with 4/2/2 subsampling. This will be similar to
capturing in YUY2, although the file size will probably be slightly higher and
the compression speed will probably be slower. I'll update my guide to
explain how to use this workaround when I upload the new material on high
resolution capture. (I plan on adding the high resolution capture stuff
very soon, by the way.)
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