File Extension VCD
File extension VCD is most commonly used by either
Video CD (aka White Book) is a standard created jointly in 1993 by JVC, Sony, Matsushita and Philips. This standard defines a way to store VHS quality digital video on optical compact disks up to 800 megabytes in size. Video CDs use MPEG-1 for compressing video at 1,150 kbps and MPEG-1 Audio Layer II for compressing stereo audio at 224 kbps. VideoCD disks usually contain the following VCD files:
- info.vcd - general album and disk information (title, copyright, etc)
- entries.vcd - list of "entrypoints" (chapters)
- psd.vcd - play sequence descriptor. This file is optional. Some disks may also contain and extended PSD file.
- lot.vcd - list ID offsets. This file is optional. Some disks may also contain and extended LOT file.
VideoCD files can not be opened directly by any software however the entire disk can be played using most modern DVD players like PowerDVD, WinDVD etc.
Virtual CD files are used to store copies of optical disks - CDs and DVDs. These files can then be "mounted" into virutal CD/DVD drives in such a way that computer believes that the actual physical disk was inserted. This may be convenient since disks can be excanged faster, stored on a remote network location etc. This also prevents wear and tear of the original disks which may become unreadable after extensive use.
It is important to use correct program to open VCD files because mismatch can cause errors and data corruption.