Instead of estimating jerkiness based solely on frame rate or motion activity, the number of consecutive dropped frames forms a basic estimation unit.
代替只基于帧速率或运动活 动性来估计图像跳动，相继的丢失帧的数目形成基本估计单位。
2
I attempted to steal to the door with an intention of calling her husband; but I was summoned back by a piercing shriek — the shawl had dropped from the frame.
我正想偷偷走到门口打算去叫她丈夫，可是一声刺耳的尖叫把我召唤回来——那围巾从镜框上掉下来了。
3
If the probe function returns TRUE, the frame is passed down the stream, but if it returns FALSE, the frame is dropped.