huge rainbow & silver macro blocks after multiplexing?

[offline]

After I encode the video using CCE to mpeg 1(CBR) the resulting
.mpv plays without fault. If I then try to multiplex with the audio file
(an .mp2 created with Tmpgenc) with either bbMPEG or Tmpgenc's mpeg
tools, the end film displays large rainbow & silver macro blocks every
now and then as if the mpeg stream was corrupted.

By itself, the video stream seems perfect.

BTW I'm using dvd2avi/avisynth/cce to convert a DVD rip
to non standard vcd with tmpgenc for audio
Any ideas?

Thanks in advance

[musicnyman]

i get these as well using CLADDVDXP -> DVD2AVI -> Tmpgenc. i just thought it was a normal abnormality and ignored it. i only get them mostly when i use CBR, VBR seems better, only get them once a time in a movie.