[MPlayer-users] vrc_override?

[Tuukka Toivonen]

Could someone write an example command line how vrc_override
can be used, say to encode frames 0-100 at quantization parameter
(vqscale/QP) 10, 100-200 at 5, and the rest at 10 again?

Whenever I try using it for some frames with fixed quantization, those
frames will be encoded with QP 2 and not with what a specified (for
positive third argument to vrc_override). With negative values (quality
correction) it somewhat works, but the quality seems to be different before
and after the section specified with the frame numbers.

Also what does the negative argument really mean? Does it change the target
QP or bitrate or what?