Multipass???? Please help!!

[TWIG3_16]

What is Multipass?? please explain!!
Cos at the moment im doing a 5 multipass VBR.
If i changed it to 1 what would happen?? and what r the differences between 1 and 5???
Will it be a worse picture quality or what??
Please reply thanks!!

Ive looked on the forums and ive looked on a website for information and i cant find any so can someone please explain!!
Or tell me where i can find information.
Thanks!!

[aleksander]

Ok...Already answered your question in another thread.
And one more thing - Do no post the same question twice!!!!
Remember of the forum rules.

aleksander

ps. this is taken from the doom9's glossary:

Multipass encoding

Before you read on: Currently true multipass encoding is available only for WM8 and MPEG-2 (SVCD & miniDVD). M4C is not true multipass encoding (and read the M4C guide to find out what it is and how it works). An encoder that supports multipass will in a first pass analyze the video stream to be encoded and write down a log about everything it encounters. Let's assume that we have a short clip which starts out in a dialog scene where we have few cuts and the camera stays static. Then it leads over to a karate fight with lots of fast cuts and a lot of action (people flying thru the air, kicking, punching, etc). In regular CBR encoding every second gets more or less the same bitrate (it's hard to stay 100% CBR but that's a detail) whereas in multipass VBR mode the encoder will use the bitrate according to its knowledge about the video stream, that is the dialog part gets of the available bitrate and the fighting part gets more bitrate. The more passes the more refined will the bitrate distribution be. In single pass VBR the encoder has to base his decisions on where to use how much bitrate solely on the knowledge of the stuff it previously has encoded.