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BadRequestException
Could not generate thumbnail from that file:
Traceback (most recent call last):
  File "/usr/src/app/include/HydrusServerResources.py", line 258, in ParseFileArguments
    thumbnail_bytes = HydrusFileHandling.GenerateThumbnailBytes( path, target_resolution, mime, duration, num_frames )
  File "/usr/src/app/include/HydrusFileHandling.py", line 101, in GenerateThumbnailBytes
    numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution ) # just in case ffmpeg doesn't deliver right
  File "/usr/src/app/include/HydrusImageHandling.py", line 629, in ResizeNumPyImage
    interpolation = cv2.INTER_LANCZOS4
NameError: name 'cv2' is not defined

Traceback (most recent call last):
  File "include\HydrusThreading.py", line 342, in run
    callable( *args, **kwargs )
  File "include\ClientGUI.py", line 145, in THREADUploadPending
    service.Request( HC.POST, 'file', { 'file' : file_bytes } )
  File "include\ClientServices.py", line 902, in Request
    network_job.WaitUntilDone()
  File "include\ClientNetworkingJobs.py", line 1137, in WaitUntilDone
    raise self._error_exception
include.HydrusExceptions.BadRequestException: Could not generate thumbnail from that file:
Traceback (most recent call last):
  File "/usr/src/app/include/HydrusServerResources.py", line 258, in ParseFileArguments
    thumbnail_bytes = HydrusFileHandling.GenerateThumbnailBytes( path, target_resolution, mime, duration, num_frames )
  File "/usr/src/app/include/HydrusFileHandling.py", line 101, in GenerateThumbnailBytes
    numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution ) # just in case ffmpeg doesn't deliver right
  File "/usr/src/app/include/HydrusImageHandling.py", line 629, in ResizeNumPyImage
    interpolation = cv2.INTER_LANCZOS4
NameError: name 'cv2' is not defined