Quote:
Originally Posted by VideoJ
MPEG 1 uses a DCT-based encoding scheme similar to jpeg but with adaptions for compression between frames. MPEG 2 is similiar to MPEG 1 so you won't get much better compression.
MPEG 4, the latest version of the MPEG standard, uses wavelet compression, a much newer technology that gives much better compression at the same quality. WMV 9 is based on the same technology and gets similar compression and quality. The problem is a lot of people have to download new decoders to watch these movies.
That's the background. I prefer WMV 9 myself for size and quality of the video.
|
I found this thread after searching for 'compressing video' and this post caught my eye....if what your saying is true with WMV 9 being comparable in quality to the original MPEG file that I compress, then why is the resulting WMV so much granier?.....for example, I've got a 2 min MPEG clip at 77MB and use AVS Video Converter (trial version) to go from MPEG to WMV....but the WMV file that it creates, although heaps smaller in size (~13MB), just doesnt have the same quality as the original....it's actually quite poor in comparison....I tried going to AVI also and same thing - around 11MB in size but very average clarity.....how the hell do all the other sites manage to do this yet keep the quality?
Maybe I'm doing something wrong???....can someone help me with this please as I have a stack-load of vids that need compressing to put on the web.
Thanks in advance.
Gg