我在dm368平台上测试1080i（./encode - y 5 - I 3 ）,编码输出信息如下：
ARM Load: 41% Video fps: 27 fps Video bit rate: 4478 kbps Sound bit rate: 0 kbps
Time: 00:08:16 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 30% Video fps: 28 fps Video bit rate: 4228 kbps Sound bit rate: 0 kbps
Time: 00:08:17 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 47% Video fps: 20 fps Video bit rate: 4148 kbps Sound bit rate: 0 kbps
Time: 00:08:18 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 62% Video fps: 19 fps Video bit rate: 4279 kbps Sound bit rate: 0 kbps
Time: 00:08:19 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 39% Video fps: 27 fps Video bit rate: 4139 kbps Sound bit rate: 0 kbps
Time: 00:08:20 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 39% Video fps: 26 fps Video bit rate: 4853 kbps Sound bit rate: 0 kbps
Time: 00:08:20 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 39% Video fps: 20 fps Video bit rate: 5201 kbps Sound bit rate: 0 kbps
Time: 00:08:20 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolutio
n: 1920x1080 Sound Codec: N/A Sampling Freq: N/A
.....................
从上面输出信息来看，Video fps: 视频编码帧率输出变化幅度较大，不知什么原因，视频丢帧是肯定的，请问如何能控制帧率(framerate)，让其 Video fps尽量固定在某值。谢谢........
