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• ffmpeg : Crop webm file with circular .png mask [closed]

  26 mars 2021, par Beneos Battlemaps

  I tried everything for hours and can get it working by myself. I want to create animated Pen&Paper tokens for virtuale tabletops. I have a .webm video file with 720x720 pixel showing an animation of a render file created out of a png sequence via

  


  ffmpeg -framerate 24 -f image2 -i face.%04d.png -c:v libvpx-vp9 -pix_fmt yuva420p face1.mp4

  


  See here : https://webmshare.com/play/ZxZa0

  


  Now i want to overlay this .webm with an circle image as frame :

  


  overlay

  


  and crop the black part so its transparent in the end result as well as keeping the transparent area in the center for the video itself.

  


  So the endresult is from this :

  


  Face1

  


  to this :

  


  Face2

  


  Can you help me out with that ? If its easier i can split the steps, making first the alpha mask crop via png and adding the circle in it later.

  


  Beste regards in advance
-Ben

  


• Latency and frame break using Hikivison using OpenCV

  23 septembre 2024, par Arjun Mani

  When I try reading frames from Hikivision camera, I face latency and frame break, from OpenCV, but it works fine with ffmpeg, and if I use any other camera, like axis, it works, fine but in Hikivision, I have some issue, so if someone has solved this issue, can please share me to solve

  


  I need to resolve this issue.

  


  import cv2

  


  import cv2

# RTSP URL
rtsp_url = "rtsp://admin:okulr123@192.168.0.64:554/Streamings/channels/101"

# Create a VideoCapture object
cap = cv2.VideoCapture(rtsp_url)

# Check if the connection is opened
if not cap.isOpened():
    print("Error: Couldn't open the video stream")
    exit()

# Read frames in a loop
while True:
    ret, frame = cap.read()

    # Check if frame was successfully captured
    if not ret:
        print("Error: Couldn't read frame")
        break

    # Display the frame
    cv2.imshow('RTSP Stream', frame)

    # Break the loop if 'q' key is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the VideoCapture object and close windows
cap.release()
cv2.destroyAllWindows()



  


• Latency and frame break using Hikvison using OpenCV

  24 septembre 2024, par Arjun Mani

  When I try reading frames from Hikvision camera, I face latency and frame break, from OpenCV, but it works fine with ffmpeg, and if I use any other camera, like axis, it works, fine but in Hikvision, I have some issue, so if someone has solved this issue, can please share me to solve

  


  I need to resolve this issue.

  


  import cv2

  


  import cv2

# RTSP URL
rtsp_url = "rtsp://admin:okulr123@192.168.0.64:554/Streamings/channels/101"

# Create a VideoCapture object
cap = cv2.VideoCapture(rtsp_url)

# Check if the connection is opened
if not cap.isOpened():
    print("Error: Couldn't open the video stream")
    exit()

# Read frames in a loop
while True:
    ret, frame = cap.read()

    # Check if frame was successfully captured
    if not ret:
        print("Error: Couldn't read frame")
        break

    # Display the frame
    cv2.imshow('RTSP Stream', frame)

    # Break the loop if 'q' key is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the VideoCapture object and close windows
cap.release()
cv2.destroyAllWindows()