CVCD, what is it and how can I do it?

13th Dec 2003 14:54 #1

Member

Hello everyone, what is the big differences between cvcd and vcd/svcd. I have heard that you can burn more minutes and come out with better quality than vcd. I'm not sure about svcd quality or not. And how would I do this type of encode? A friend told me the only difference was the cvcd was 2-pass vbr where as a vcd is cbr. So I used the unlock features and chose the 1246 vcd template and used 2-pass vbr for some reason it does look better. Can someone enlighten me please thanks.

Quote

13th Dec 2003 15:17 #2

ZippyP.

Member

VCD spec. is mpeg1 fixed at 1150 Kb/s video bitrate (CBR) at 350x240 (NTSC) resolution.
SVCD spec. is mpeg2 2600 Kb/s max. bitrate CBR or VBR at 480x480 resolution.

If you go out of the above specs. you create an XVCD or XSVCD which may or may not play on your DVD player.

CVD uses mpeg2 at 352x480 resolution and if you use it to make an SVCD then follow all the other SVCD specs. Higher resolution demands a higher bitrate to keep looking good or else blockiness is created. CVD is a compromise between VCD and SVCD, it has high enough resolution to look good to most people and you can use a lower bitrate than SVCD to get more minutes per disk. There are CVD templates in the Tools section, d/l and put them in to the TMPGEnc template subdirectory. The next time you start TMPGEnc they will be available.

2-pass vbr also lets you fit more minutes per disk while keeping quality. It analyzes the video on the first pass then encodes the movie on the second pass. Higher bitrates are applied to high action scenes and lower rates to more static scenes thereby applying bitrate more efficiently than CBR. The average bitrate can be lower than a CBR encode thereby getting more minutes per disk. If space is not an issue then VBR is not necessary as a max. bitrate CBR encode cannot be improved upon. 2-pass does take up to twice as long.

I get up to 1 hr. on a CD using 2-pass VBR at CVD resolution but you need to decide what looks good to you.