the default for SVCD is 230KB
AFAIK (X)SVCD VBV buffer (Video Buffering Verifier) default is 224kB although some apps use 230kB for historical reasons.
224 kB (1,835,008 b) seems to be the maximum video buffer for SVCD:
<http://perso.wanadoo.fr/lelab/video/svcd_en.htm>
And the minimum video buffer for SVCD seems to be 112 kB:
<http://www.digvid.info/tmpgenc/settings_video.php>
From: Andrew Stevens To: [EMAIL PROTECTED] Subject: Re: Video buffer size with mpeg2enc and mplex Date: Tue, 10 Dec 2002 22:14:05 +0100
mpeg2enc and mplex seem to use different video buffers for their standard SVCD settings. _If_ I'm reading mplex output right, then:
mplex -f 4 (i.e. standard SVCD) uses 235520 B = 230 kB:
INFO: [mplex] Video e0: buf= 235520 frame=000000 sector=00000000
On the other hand, mpeg2enc -f 4 (i.e. standard SVCD) uses 229376 B = 224 kB because mplex gives the following output:
INFO: [mplex] Vbv buffer size : 229376 bytes
This 224 kB also seems to be the maximum XSVCD buffer mplex reports.
Maybe the exact value for XSVCD doesn't matter much as long as it is about 224-300 kB and the XSVCD doesn't differ much from SVCD.
Well spotted. The reason for the difference is to allow a bit of "safety margin" in mpeg2enc's bit-rate calculations. Actually, it hasn't really needed it for quite some time but I never got around to making it all consistent!
-- Matti Haveri <[EMAIL PROTECTED]> <http://www.sjoki.uta.fi/~shmhav/>
------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
