AVI2SVCD - Why does it separate audio & video?

I know there must be a good reason that the audio and video are separated. But I haven't found an explanation and would like to understand this.

Hi, Not really sure if I understand your question, but to convert an AVI to an SVCD, this is a necessary step. An AVI consists of a an audio stream and a video stream muxed together. So AVI2SVCD seperates the streams, converts them both individually and muxes them back together in MPEG2 format. Scott

I don't understand why it's a necessary step. I've seen guides that discuss avi to svcd and don't separate the audio and video.

then maybe you'd like to point us in that direction...i don't see how this is possible.

I took a look at the guides again. The CCE guides seem to always separate the audio and video. The ones for Procoder and TMPGEnc often don't. I guess if AVI2SVCD has to do it for one encoder then it makes sense to use the same method for all of them.

Thanks DDogg, I'm the type of guy who isn't satisfied with a step-by-step guide. I need to know why things are done the way they are. Your post was very helpful. And I'll try to take your advice to "give it time to soak in". :)

It is funny you said that. I was just thinking that one of the best things a person could do who actually wanted to understand all the bits and pieces would be to go back and trace one of the "old" ways. Here is a shorthand for one of the simplest (NTSC): 1> rip - DVDDecrypter 2> create d2v file and wav - DVD2AVI 1.76 3> serve video to encoder of choice - Avisynth 2.51 using mpeg2dec3.dll (also may need VFAPI/Link2 depends if encoder loads AVS or not) 4> Add pulldown - Pulldown.exe (NTSC) 5> encode wav to mp2 - toolame.exe 6> Mux and cut - BBMplex or Mplex.exe 7> Create image and burn - VCDEasy If you do all that, you will have a very good feel for the job. Additionally you would then want to add subtiles, multiple audio tracks, Chapter extraction from original DVD and placement in svcd image, etc.

My source is DV AVI that is captured from Tivo. The sample I'm using is telecined and needs IVTC, so everything from step 3 on is relevant (except for mpeg2dec3.dll). I tried serving the video to CCE using an Avisynth script that does IVTC, resize, noise reduction and sharpening. The noise reduction is really slow and I was doing several passes on CCE. Apparently each CCE pass reads the AVI file, so the noise reduction, etc. is done several times which takes a really long time (26 times longer than the clip). Someone suggested filtering the file and saving it to a temporary file with a lossless codec and then feeding that file to CCE. That makes sense but some of my source files will be 20GB and filtering that to a temporary file will require another 60GB. Even saving the temp file to DV isn't feasible right now. So I'm stuck on trying to figure out how to do this without using up so much disk space or time. Would it work to serve the DV AVI to VirtualDub and then serve it's output to CCE? [edit] I just tried it and it seems to be working. But, although I think this is very cool, I just realized that all I've done is create a more complicated and even slower way of generating the same problem. :)

It's a 1Ghz P3. It's the pixiedust filter that is so slow. I figure a 20GB file will take 52 hours to encode. I guess I need to find another noise reduction filter.