将NSData转换为CMSampleBufferRef

Question

有没有办法从NSData创建CMSampleBufferRef？ NSData对象以前也是从CMSampleBufferRef构造的。我需要转换，因为我想保存使用AVFoundation从实时相机拍摄的CMSampleBufferRef帧（作为NSData），然后能够使用CMSampleBufferRef帧（通过将NSData对象转换为CMSampleBufferRef）来构建视频。

提前致谢...

Answer 1

import numpy as np

inp_arr = np.array([[255, 255, 255, 255, 255, 255, 255, 255],
 [255, 255, 255, 255, 255, 255, 255, 255],
 [255, 0, 0, 255, 255, 255, 255, 255],
 [255, 0, 0, 255, 255, 255, 255, 255],
 [255, 255, 255, 255, 255, 255, 255, 255],
 [255, 255, 255, 255, 255, 255, 255, 255],
 [255, 255, 255, 255, 0, 0, 255, 255],
 [255, 255, 255, 255, 0, 0, 255, 255],
 [255, 255, 255, 255, 255, 255, 255, 255]])

out_arr = np.array([[255, 255, 255, 255, 255, 255, 255, 255],
 [0, 0, 0, 0, 255, 255, 255, 255],
 [0, 0, 0, 0, 255, 255, 255, 255],
 [0, 0, 0, 0, 255, 255, 255, 255],
 [0, 0, 0, 0, 255, 255, 255, 255],
 [255, 255, 255, 0, 0, 0, 0, 255],
 [255, 255, 255, 0, 0, 0, 0, 255],
 [255, 255, 255, 0, 0, 0, 0, 255],
 [255, 255, 255, 0, 0, 0, 0, 255]])