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• avformat/mov : Fix integer overflow in mov_get_stsc_samples()

  5 mars 2018, par Michael Niedermayer

  avformat/mov : Fix integer overflow in mov_get_stsc_samples()
  Fixes : runtime error : signed integer overflow : 5 * -2147483647 cannot be represented in type 'int'
  
  Fixes : Chromium bug 817338
  
  Reviewed-by : Matt Wolenetz <wolenetz@google.com>
  
  Reported-by : Matt Wolenetz <wolenetz@google.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/mov.c

• Vidgear write Video not open

  25 août 2020, par MrTuyen

  Source code

  



  Command : (https://drive.google.com/file/d/14YGKIhftAidQVvR_nMWY3oIhcWFzLERE/view?usp=sharing)

  



  No errors occurred. I have been trying to figure out how to write videos with Vidgear. I am working with windows and webcam.

  



  Error : "Output.mp4" Opened is a black color. (https://drive.google.com/file/d/11x-q_w59gdaAECtRIqi0MNGIOZ-Vuati/view?usp=sharing)

  



  # import required libraries
from vidgear.gears import CamGear
from vidgear.gears import WriteGear
import cv2

# Open live video stream on webcam at first index(i.e. 0) device
stream = CamGear(source=0).start()

# retrieve framerate from CamGear Stream and pass it as `-input_framerate` parameter
output_params = {"-input_framerate":stream.framerate}

# Define writer with defined parameters and suitable output filename for e.g. `Output.mp4`
writer = WriteGear(output_filename = 'Output.mp4', **output_params)

# loop over
while True:

    # read frames from stream
    frame = stream.read()

    # check for frame if None-type
    if frame is None:
        break


    # {do something with the frame here}


    # write frame to writer
    writer.write(frame)

    # Show output window
    cv2.imshow("Output Frame", frame)

    # check for 'q' key if pressed
    key = cv2.waitKey(1) & 0xFF
    if key == ord("q"):
        break

# close output window
cv2.destroyAllWindows()

# safely close video stream
stream.stop()

# safely close writer
writer.close()


  


• avformat/oggparseogm : Check lb against psize

  9 mars 2018, par Michael Niedermayer

  avformat/oggparseogm : Check lb against psize
  No testcase, this was found during code review
  Found-by : Matt Wolenetz <wolenetz@google.com>
  
  Reviewed-by : Matt Wolenetz <wolenetz@google.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/oggparseogm.c