AVI->Mpeg (source issue)

[hardfire]

hi, i have 2 AVI files which i wanna port over to SVCDs.

Q#1:
File-A has Video Compression = DivX Codec
File-B has Video Compression = DIVXMPG4 V3

both files have Audio Format = MPEG Layer-3 (48.0KHz)

now according to the help instructions for SVCD creation, i gotta get my AVIs to MPEGs first, now because of their video compression, does that mean i gotta extract their audio content first (via VirtualDub) and then use TMpegEnc to encode the video and audio into MPEG (SVCD compliant).

Q#2
When encoding to MPEG using TMpegEnc, what would happen if i didn't encode using the same framerate as the Help instructed? ie: if original AVI was 23.976 FPS , but i encoded using 29.970 FPS?

Q#3
I did follow the instructions in the HELP article, extracted out the large wav files, encoded via TMpegEnc and managed to get whopping large Mpegs files. i didn't use the bitrate calc, and i think the audio was compressed using CBR. Could someone explain why did they become so huge? ie: original AVI was 600+MB, final MPEG was 1+GB. Is there a way to reduce the size? downsample the audio?? i can't down the fps right, else it won't be mpeg-2 compliant.

i know those are long questions, anyway thanks in advance.

[banjazzer]

does that mean i gotta extract their audio content first (via VirtualDub) and then use TMpegEnc to encode the video and audio into MPEG (SVCD compliant).

Yes. It is recommended always to extract the audio as an uncompressed wav. If the audio is CBR mp3 you can get away with it, but best always to extract first.

When encoding to MPEG using TMpegEnc, what would happen if i didn't encode using the same framerate as the Help instructed? ie: if original AVI was 23.976 FPS , but i encoded using 29.970 FPS?

It is best always to use the correct framerate template to fit the source. Try a sample to see the result. I would think it will look extremely jerky as frames are duplicated.

Could someone explain why did they become so huge?

The sound is CBR in an SVCD. The reason why your mpg is large is because you should get about 50-60 minutes of movie per disc (~790MB mpg). If you are using the CBR template you will get half that amount of minutes per disc. Try looking for a guide that uses 2-pass VBR or CQ. If you can't find one here, take a look at http://www.svcd.cc/index.htm

[hardfire]

thanks for the reply Nol Brouwer, i thought no one would answer a newbie question

anyway earlier i found SVCD templates! they were in the tools section... and i tried using KingViper's template on SVCD encoding.

i had 2 machines running. unfortunately it was my folly that one ran out of hdd space (silly me) , while the other (710+MB AVI file) encountered some problems - TMpgEnc reported some error near the end. i have no idea why that error occured or what caused it. i have yet to check the mpeg file.

unfortunately the 710+MB avi that i tried to convert exploded into a 900+MB file. i thought KingViper's template used 2-pass VBR for its video encoding. hmm... maybe i should drop the audio quality?