TMPGEnc DC component precision

[jjwerrett]

which is the best bits to use "9bits" is the default i am encoding avi -> mpeg 2 for my dvd-r and wana know is using "10bits" better or that etc or that. And what does the 8,9,10 bits opsion do

[geoffman]

A quote from here (http://www.digvid.info/tmpgenc/settings.php) probably explains it best:

DC component precision
The DC component represents the average brightness of a block (8x8 pixel region). In MPEG-1 video this is fixed to 8 bits, but MPEG-2 allows higher precision. It is important that the DC component is accurately represented, so a setting of 10 is recommended for MPEG-2 sequences, unless you are encoding using a low bitrate.