Super Video CD#MVCD
When MVCD ( Mole Video CD) is a non-standard Video CD ( VCD), which provides a playback time of about 2 hours per CD.
A normal VCD is encoded in MPEG -1 process with constant bit rate (CBR ), ie, all scenes are with default 1150 Kbit / s for the video stream is encoded, regardless of whether it is a fast action scene or a quiet conversation.
MVCD is the MPEG-1 or MPEG-2 Variable Bit Rate (VBR) coding, ie the bit rate is increased during fast scenes, for example, 2000 kbit / s, but it is lowered in a very quiet scene to 270 kbit / s. It will also work with a modified quantization matrix and to obtain more disk space, the bit rate of the sound MP2 reduced from 224 kbit / s (VCD standard) usually at 128 kbit / s A change in the GOP will be omitted in favor of normal MVCD compatibility. MVCDs extended GOP are called MVCDex and provide a further increase in playing time, with these it can cause problems with some DVD players.
By staying close to the SVCD standard ( here "variable bit rate " ) can play most DVD players MVCDs in the VCD resolution (352 × 288 television standards PAL or 352 × 240 NTSC). Experience has shown that especially cheap DVD player here rarely have problems. A file created with the MVCD templates MSVCD (ie 480 × 576 MPEG -2 PAL) is the same as a standard SVCD, only that one is able to get along with almost the same image quality at a lower bit rate. This makes it possible to burn a complete 90 - to -120 -minute movie at near SVCD quality on a CDR80 and play with each SVCD -compatible DVD player.
MVCDs be created using the MPEG encoder software TMPGEnc and the offer MoleVCD associated templates ( presets). There are templates for resolutions of 352 × 288 (VCD) 480 × 576 ( SVCD) up to 720 × 576 (DVD ) each for PAL and NTSC.
History comes this VCD production method, also known as eXtended VCD XVCD, from experience, among others, Kwaq ( KVCD ) and Mole, but was developed from Version 2.5 (July 2003) by roc with the help of MVCD community completely new. Other formats such as RSVCD, AVCD, XVCD, DVCD or TVCD essentially differ by resolution, bit rate, GOP and the quantization matrix used. Users of these variants should be aware of possible compatibility issues in areas such as "permitted resolutions " or to extreme GOP values !