Question

我正在尝试读取存储在扩展名为.h5的文件中的视频，而不是将该视频存储在视频文件（.avi，.mp4）中。我能够读取h5文件中的数据并在屏幕上显示视频。（cv2.imshow）但无法在视频文件中写入数据。我正在使用cv2.VideoWriter来编写视频。我尝试使用不同的视频格式作为输入参数＆＃39; VideoWriter＆＃39;。它无效这是我使用的代码：

fourcc = cv2.VideoWriter_fourcc(*format)
#File to be read
#It is a gray scale video of mouth region extraacted from a coloured video of full face
my_h5_file = 'Z:/sa.h5'
feature_name = 'sequence'

#to read the h5 file
with h5py.File(my_h5_file, 'r') as f:
    #roi: contains the value or the video
    roi = f[feature_name].value
    #numframe  193 , y =36, x = 36
    num_frames,y,x = roi.shape[:3]

    print(num_frames)
    print('y:',y,'x:',x)
    #Using VideoWriter to write video in avi format
    outvid = cv2.VideoWriter('Z:/output10.avi',fourcc,30,(x,y))

#to write the video frame by frame
    for i in range (num_frames):
        frame = roi[i,:]
        f = np.squeeze(frame)
        outvid.write(frame)
    outvid.release()

显示此错误：

OpenCV Error: Assertion failed (image->depth == 8) in
 CvVideoWriter_FFMPEG_proxy::writeFrame, file
 C:\projects\opencv-python\opencv\modules\videoio\src\cap_ffmpeg.cpp,
 line 274 Traceback (most recent call last):   File
 "Z:/VSR/pyVSR/display_roi_video.py", line 38, in <module>
     outvid.write(frame) cv2.error: C:\projects\opencv-python\opencv\modules\videoio\src\cap_ffmpeg.cpp:274:
 error: (-215) image->depth == 8 in function
 CvVideoWriter_FFMPEG_proxy::writeFrame

读取h5文件并以.avi格式将视频存储在该文件中

0 个答案: