```
-m, --subme <integer> Su
bp
ixel motion estimation and mode decision [7]
- 0: fullpel only (not recommended)
- 1: SAD mode decision, one qpel iteration
- 2: SATD mode decision
- 3-5: Progressively more qpel
- 6: RD mode decision for I/P-frames
- 7: RD mode decision for all frames
- 8: RD refinement for I/P-frames
- 9: RD refinement for all frames
- 10: QP-RD - requires trellis=2, aq-mode>0
- 11: Full RD: disable all early terminations
```
以上是x264 help 中的说明，印象中用到子像素是帧间编码的时会用通过插值得到子像素，然后取进行ME搜索相似的块，所以这个subme就是用在插值预测子像素吗？

好像找到相应的东西了
https://www.cnblogs.com/TaigaCon/p/3859396.html

“用在插值预测子像素” 改成 “用插值出来的子像素做预测” 比较合理