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wang
BIAC Alum
USA
57 Posts |
 Posted - Jun 10 2003 : 09:06:48 AM
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Does anyone know how to compress avi. files without lower video's quality?
Each of my video'clip files are over 1GB. I used Adobe Premiere's export function to compress avi. files, I chosed microsoft video compressor with 85% quality, and I got an acceptable quality vedio with size of 800MB(around). If I choose compress quality lower than 85%, the file size would be smaller but the video qulity is poor.
If anyone have any good suggestion in compressing avi. files without lower video's quality, it would be very thankful.
Lihong Wang
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ken.roberts
Junior Member
26 Posts |
Posted - Jun 10 2003 : 10:51:36 AM
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Hello,
There are a couple of tips that you can use for compressing videos better.
- Start with as high quality a video clip or source as possible before compressing a video, and try not to use an already compressed video as a source.
- Try a few different codecs- you will find that they will give you vastly different results. If your computer does not have the latest codecs, ask the sysadmin to download them.
My guess is that you started with the Microsoft Video 1 codec, which by now is on the older side. You may want to look into using Windows Media 8, or if you computer has the processing power to play it without skipping, Windows Media 9. Both of these are available for download free from the Microsoft Website. Another codec, DivX, has gained popularity recently as well.
Ken |
Woldorff Lab
Center for Cognitive Neuroscience
(919) 668-1334 |
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wang
BIAC Alum
USA
57 Posts |
Posted - Jun 10 2003 : 11:21:27 AM
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Hi Ken,
Thanks for your tips very much.
I captured the videos by Premiere. The best resolution I can have is 320x240. To my understanding, the resolution is limited by the capture card (because I could not increase it to 640x480), I am correct?
Currently the codecs we have in Premiere are Cinepak Codec by Radius, Intel Indeo Video R3.2, Microsoft MPEG-4 video Codec V1 and V2, Microsoft RLE, and Microsoft Video 1. I tried the first and the last codecs, either of them are good engouh. I guess I have to have the new codecs downloaded, since the rest of codecs we have now are all old ones, right?
Thanks again
Lihong |
lihong |
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ken.roberts
Junior Member
26 Posts |
Posted - Jun 10 2003 : 12:24:46 PM
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The Microsoft MPEG4 codec may not be quite as good as the latest technologies, but it should be substantially better than the other ones you listed. Try it and see if it fits your needs.
Ken |
Woldorff Lab
Center for Cognitive Neuroscience
(919) 668-1334 |
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wang
BIAC Alum
USA
57 Posts |
Posted - Jun 10 2003 : 1:30:16 PM
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You are right, Ken. The Microsoft MPEG4 codec is not bad at all. It droped my 1GB file to 100MB. It's nice. Thanks a lot.
Lihong |
lihong |
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Topic |
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Compress avi File
