Muxer vcd [MPEG-1 Systems / MPEG program stream (VCD)]:
    Mime type: video/mpeg.
    Default video codec: mpeg1video.
    Default audio codec: mp2.
vcd muxer AVOptions:
-muxrate           <int>        E..... (from 0 to INT_MAX)
-preload           <int>        E..... Initial demux-decode delay in microseconds. (from 0 to INT_MAX)

