[MPlayer-users] skipped frames during encoding

[Greg Bryant]

Probably a total noob question, but here goes.  In my playing with h284, I'm
taking an existing 4m .mov video, and encoding it to h264.  Here's the (very
basic) command line:
mencoder vid1.mov -o vid1.avi -ovc lavc -lavcopts vcodec=libx264 -oac copy

During encoding, it ends up skipping a frame about every 3/4 second, so that
the resulting video is very jerky.

Skipping frame!
Pos:   1.6s     41f ( 0%) 13.16fps Trem:   8min   8mb  A-V:0.083 [73:128]
Skipping frame!
Pos:   2.4s     61f ( 0%) 12.37fps Trem:  13min  26mb  A-V:0.083 [380:128]
Skipping frame!
Pos:   3.1s     81f ( 0%) 12.88fps Trem:  17min  29mb  A-V:0.083 [308:128]
Skipping frame!
Pos:   3.9s    101f ( 0%)  8.89fps Trem:  21min  79mb  A-V:0.083 [1329:128]
etc.

What options should I be looking at/learning more about to solve this?

Thanks
Greg