Use loop filter.
@item qscale
Use fixed qscale.
-@item gmc
-Use gmc.
-@item mv0
-Always try a mb with mv=<0,0>.
-@item input_preserved
-
@item pass1
Use internal 2pass ratecontrol in first pass mode.
@item pass2
Set error[?] variables during encoding.
@item truncated
-@item naq
-Normalize adaptive quantization.
@item ildct
Use interlaced DCT.
@item low_delay
macroblock (MB) type
@item qp
per-block quantization parameter (QP)
-@item mv
-motion vector
@item dct_coeff
@item green_metadata
@item startcode
-@item pts
-
@item er
error recognition
@item mmco
memory management control operations (H.264)
@item bugs
-@item vis_qp
-visualize quantization parameter (QP), lower QP are tinted greener
-@item vis_mb_type
-visualize block types
@item buffers
picture buffer allocations
@item thread_ops