[MPlayer-users] About CVCD

[Jukka Tastula]

On Thursday 05 December 2002 14:30, Steffen Barszus wrote:

> - at low bitrates (sometimes blocky)

Its always blocky unless you use yuvscaler to make it all blurry :) 

> - sharp edges ( ringing affect (a lot ! at least in my experimrents))

Yup, sharpness might look good in the master but it bites you when you try 
compress it...

> - size prediction ( you can only give the quantesizer , no average bitrate
> or something like that, maybe it can be steered by lowering the max-bitrate
> and hopefully does not produce crap at highbitrate-scenes)

My experiments tell me setting the quant at 2 gives you pretty much constant 
bitrate (all my encodings vere ~40 minutes so I'm hitting 2500kbps all the 
time anyway) but for this kind of job you'd really want two passes to get it 
right at first go.

> The next problem I see is that the max-time of svcd is AFAIK 79:30 ( near
> 80:00 min at least) so I dont see how there can be 90 min on that cd.

Eh? And where does this limit come from? You must be thinking vcd which has a 
combined bitrate of exactly the same as audio cd, so 1 minute of data = 1 
minute of video. SVCD doesn't have this restriction: you can have _up to_, 
not only 2500kbps variable bitrate video and audio _up to_, not only 384kbps 
(any encoder actually exist that can do that? toolame only goes to 320kbps) 
so you can certainly have more than 80 minutes on one cd if the player can 
play such low bitrate video+audio. It'll be annoyingly blocky at standard 
svcd resolution though :)  It all really depends on the player in the end.