Quote: Video specifications
Codec: MPEG-1 Resolution: NTSC: 352x240 PAL/SECAM: 352x288 Aspect Ratio: NTSC: 4:3 PAL/SECAM: 4:3 Framerate: NTSC: 29.97 or 23.976 frames per second PAL/SECAM: 25 frames per second Bitrate: 1,150 kilobits per second Rate Control: constant bitrate
Although many DVD video players support playback of VCDs, VCD video is only compatible with the DVD-Video standard if encoded at 29.97 frames per second or 25 frames per second.
The 352x240 and 352x288 (or SIF) resolutions were chosen because it is half the horizontal and vertical resolution of NTSC video, and half the horizontal resolution of PAL (the vertical resolution of PAL already being half of the 576 active lines). This is approximately half the resolution of an analog VHS tape which is ~330 horizontal and 480 vertical (NTSC) or 330x576 (PAL).
Audio specifications
Codec: MPEG-1 Audio Layer II Sample Frequency: 44,100 hertz (44.1 kHz) Output: Dual channel or stereo Bitrate: 224 kilobits per second Rate Control: Constant bitrate
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