|
Author
|
Topic: Compression Question
|
Danny
|
posted 03-05-2001 10:33 AM
OK I have a question about compression. I have the DIVX MPEG 4 3.11 Alpha codec. I heard that if you use the fast motion codec and 6000 kilobytes data rate you should be able to compression a whole DVD movie to fit onto a CD-ROM.
Well I tried to compress my 25 minute movie, and it said the estimated size was about 700 MB when I cancelled it (it was counting up). Am I doing something wrong?
Also, when I played back what I had rendered thus far, it had no audio even though I had chosen the audio codec PCM 44KHz 16 bit stero.
Can someone give me some compression tips for 1.) Getting my movie on CD and 2.) Getting it to a file size for online viewing
At max quality of course.Thanks
|
Tn
|
posted 03-05-2001 05:35 PM
At this point I wouldn't be using the new DivX codec. It still has some work to go before it is really useable. Right now I'm still using the original DivX, but I can see not wanting to use it due to gray legal area.First of all go to www.divx-digest.com and download one of the bit rate calculators. Then read some of the articles they have. Here is some of the basics though:
Slow Motion at a rate of 1000 and up is ALWAYS better than Fast Motion. The only time I use Fast Motion is to compress animated stuff. Also audio takes up an incredible amount of space unless you use MP3 audio compression. |
sketchman
|
posted 03-06-2001 01:55 AM
to put your movie on CD, just get a program that converts movies into the MPEG format needed to make a VideoCD. i think easyCD can make VideoCDs pretty easily.
as to making an online version... well, at 25 minutes, you're either gonna have to sacrifice quality for us modem users, or you can forget modem users and make a decent video file for cable and DSL users.------------------
Monkey Sea Entertainment - renovated as of January 2001
-------------------------
Moviemakers Portal (moviemaking-only search engine) |
Danny
|
posted 03-06-2001 12:33 PM
How do I use an MP3 audio compression? Where do I get the codec to do it? I can't do it right now. |
Tn
|
posted 03-06-2001 04:43 PM
It comes with the original DivX codec. |
BIG JIM SLATE
|
posted 03-06-2001 05:10 PM
Some people use the Radium MP3 codec, which is pretty much an illegal hack of the Fraunhaufer (sp?) MP3 codec. It allows you to get up to 320kbps bitrates. HOWEVER, there's some kind of "bug" with this codec, causes the audio to slightly go out of sync with the video after a while, which then needs to be corrected. |
SixOfNine
|
posted 03-07-2001 07:28 AM
The name is "Fraunhofer", a German company. It has 50 institues in Germany, and 6 in the USA.
In 1987, the Fraunhofer IIS-A("Institut für integrierte Schaltungen"), located in Erlangen(Germany), started work on perceptual audio coding in the framework of the EUREKA project EU147, Digital Audio Broadcasting (DAB). In a joint cooperation with the Erlanger Universität(University of Erlangen), the Fraunhofer IIS-A finally devised a very powerful algorithm that is standardized as ISO-MPEG Audio Layer-3 (IS 11172-3 and IS 13818-3).In the mid-90s, the Fraunhofer IIS-A published a demo of MP3 in the Internet.
While being unnoticed in Germany, in the USA the codec was used to share music on the Internet. That's basically the story of MP3. 
(the Fraunhofer IIS-A still owns the rights on MP3) |
