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My company has a great deal of videotape that is being converted to digital formats for preservation. One firm doing analog-digital conversion for archiving is using a combination of DVD and MPEG2000, apparently delivered on separate media....
My Question is, exactly what is MPEG2000? I've looked all over the web and found no answers, only obscure and outdated references to it. Can anyone explain what it is, and how it differs from MPEG-2, or-1, or anything?
Much Thanks,
N Gibson
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you mean jpeg2000 , which is a wavelet codec also used extensively in digital cinema ...
some people call jpeg2000 video files mpeg2000 - though technically it would be possibly mjpeg2000 to be a bit more correct ..."Each problem that I solved became a rule which served afterwards to solve other problems." - Rene Descartes (1596-1650) -
i just looked it up -- and there WAS a mpeg2000 proposed -- it seems to have gone away OR been incorporated into H264
so it could mean jpeg2000 (really good btw) or h264 (not so good for editing or reprocessing - but excellent quality at small files sizes)"Each problem that I solved became a rule which served afterwards to solve other problems." - Rene Descartes (1596-1650) -
Aha, it appears the format I'm looking for is MJPEG2000.
Next question: Can it be edited with Sony Vegas? What file format is it typically delivered in? (AVI, MPG)? -
It's usually a folder of a sequence of stills, with MXF wrapper, IIRC.
I believe QT does have a JPEG2000 codec now both on PC and Mac (was MacOSX only before), so it could be incorporated into a MOV.
And, trials have been done to allow use of 'em in MP4 container, but I don't think that's been set in stone or allowed any standard commercial applications yet.
Scott -
Morgan Multimedia has a MJPEG-2000 codec.
M-JPEG is from the time of better capture cards for analogue video, they captured into M-JPEG files. They use much more space than MPEG, since each frame is self-contained - not "between-frames" or anything like that. The up side is of course that it's much easier to make editing programs (Adobe Premiere, Ulead MovieStudio...)
In those "older days" you needed to have the capture card to be able to playback the AVI/M-JPEG files, machins in combination with SW codecs were too slow. You captured, edited and then sent it to S-VHS/VHS tape. Now those files can easily be played att full speed with the Morgan Codec (there are a couple more). -
Yes, but that's not quite the same.
As MJPEG is to JPEG, so MJPEG2000 is to JPEG2000.
Actually it's better, because while there were multiple non-standardized implementations of MJPEG, they have pretty much standardized MJPEG2000, so it should be easier to implement among different companies' products.
MJPEG is a 80s-90s era DCT codec strategy, much like DV format (sometimes better, sometimes worse, many worse).
JPEG2000 uses newer compression strategy, expanding on DCT but also using WAVELET compression. It also has a lossless mode.
MJPEG2000, then, has similar capabilities.
Scott -
MJPEG2000 can be edited with vegas - as long as you can get the right codec -- i use as an example Qbit codec (archive and storage) which more or less is a mjpeg/jpeg2000 lossless codec) , QuVis Digital Cinema wavelet codec (1-4 streams 10 video DCI wavelet + 10 channels lossless audio (discrete) ) and Doremi Labs DCI-JPEG2000 (up to 250Mb/s bit rates) codec ....
these can be quite large files run off a raid system btw .(for editing)"Each problem that I solved became a rule which served afterwards to solve other problems." - Rene Descartes (1596-1650) -
This has been a big help - I'm going to be ramping up my knowledge of all this as the project goes on but... All the info is much appreciated. (And any additional info will be too!)
N Gibson
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