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• Merge commit ’f128b8e19ac7f702adae899ab91cc1e80f238761’

  10 novembre 2015, par Hendrik Leppkes

  Merge commit ’f128b8e19ac7f702adae899ab91cc1e80f238761’
  * commit ’f128b8e19ac7f702adae899ab91cc1e80f238761’ :
  
    mov : detect cover art pictures by content
  Merged-by : Hendrik Leppkes <h.leppkes@gmail.com>
  

  • [DH] libavformat/mov.c

• avcodec/xbmenc : xbm Lower memory use

  19 janvier 2021, par Jose Da Silva

  avcodec/xbmenc : xbm Lower memory use
  Two minor memory improvements.
  First bug reduces memory needed to about 6/7 the needed amount, which
  
  allows you to host almost 7 pictures in the same memory needed for 6
  
  Second is a recalculation of the total additional memory for headers etc.
  size = avctx->height x (linesize * 6 + 1) + (31+32+38+4+1)
  
  Subject : [PATCH 2/3] avcodec/xbmenc : xbm Lower memory use
  Small 6/7th size memory reduction.
  
  size = avctx->height x (linesize * 6 + 1) + (31+32+38+4+1)
  Signed-off-by : Joe Da Silva <digital@joescat.com>
  

  • [DH] libavcodec/xbmenc.c

• OpenCV cant open rtsp stream of hikvision cameras ?

  25 août 2022, par Smadar

  I'm using hikvision camera, and tried to open the rtsp stream using OpenCV videoCapture with cv2.CAP_FFMPEG, but OpenCV failed to open it.
I open the stream from VLC and it is working fine.
The configuration parameters in the camera dashboard was changed as well. The encoding parameter was changed from H265 to H264, the resolution also has changed to a lower values (1280*720 - the lowest, also tried full HD), the bitrate was changed as well .
I tried to open the stream in two ways -
The first way :

  


  feed = cv2.VideoCapture('rtsp://user:password@IP:554/Streaming/Channels/1', cv2.CAP_FFMPEG)
print('FEED IS OPEN ? ', feed.isOpened())
if feed.isOpened():
    print('IM HERE')
    frame_status, frame = feed.read()
    print(frame_status)
    print(frame.shape[0])


  


  The second way :

  


  cap = cv2.VideoCapture()

cap.open("rtsp://user:password@IP:554/Streaming/Channels/1")
print('IM HERE', cap.isOpened())
while(True):
     # Capture frame-by-frame
    print('IM HERE')
    ret, frame = cap.read()
    print('RET: ', ret)
    print(type(frame))
    print('IM HERE')
    # Our operations on the frame come here
    #gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Display the resulting frame
    print(frame.shape[0])
    # cv2.imshow('frame',ret)

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()


  


  There is also check ping and there is a connection to the camera.

  


  I will really appreciate any help here in trying of figure this out.
Thank you all.