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• How do I use ffmpeg with Python by passing File Objects (instead of locations to files on disk)

  1er mai 2012, par Lyle Pratt

  I'm trying to use ffmpeg with Python's subprocess module to convert some audio files. I grab the audio files from a URL and would like to just be able to pass the Python File Objects to ffmpeg, instead of first saving them to disk. It would also be very nice if I could just get back a file stream instead of having ffmpeg save the output to a file.

  For reference, this is what I'm doing now :

  tmp = "/dev/shm"
  
  audio_wav_file = requests.get(audio_url)
  
  ##              ##                         ##
  
  ## This is what I don't want to have to do ##
  
  wavfile = open(tmp+filename, 'wrb')   
  
  wavfile.write(audio_wav_file.content)
  
  wavfile.close()
  
  ##              ##                         ##
  
  conversion = subprocess.Popen('ffmpeg -i "'+tmp+filename+'" -y "'+tmp+filename_noext+'.flac" 2>&1', shell = True, stdout = subprocess.PIPE).stdout.read()

  Does anyone know how to do this ?

  Thanks !

• why can't I access rtsp camera in python ?

  6 septembre 2024, par Come Oh

  I'm trying to access an RTSP camera in Python and get frame information from it.

  


  One of the camera options is RTSP authentication, and when I include it, VLC asks for login information. ('[rtsp @ ] method DESCRIBE failed : 401 Unauthorized')

  


  If I turn it off, I can access it regardless of ID or PW, but if I turn it on, I can't access it from Python.

  


  I verified that it works by putting the same RTSP address, ID, and PW in VLC, and it doesn't contain any symbols like '@' which is a common problem.

  


  I used several libraries, including Opencv, ffmpeg, and others, and got the same
'[rtsp @ ] method DESCRIBE failed : 401 Unauthorized' and only this error appears

  


  What could be the cause,,, please help...

  


  import cv2

url = "rtsp://username:password@camera_ip:554/stream_path"

cap = cv2.VideoCapture(url)

if not cap.isOpened():
    print("Failed to open RTSP stream.")
    exit()

while True:
    ret, frame = cap.read()
    if not ret:
        print("Failed to read frame.")
        break
    cv2.imshow('RTSP Stream', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()


  


  I tried running the above code and debugging it using the ffmpeg library.

  


• why can't access rtsp camera in python ?

  6 septembre 2024, par Come Oh

  I'm trying to access an RTSP camera in Python and get frame information from it.

  


  One of the camera options is RTSP authentication, and when I include it, VLC asks for login information. ('[rtsp @ ] method DESCRIBE failed : 401 Unauthorized')

  


  If I turn it off, I can access it regardless of ID or PW, but if I turn it on, I can't access it from Python.

  


  I verified that it works by putting the same RTSP address, ID, and PW in VLC, and it doesn't contain any symbols like '@' which is a common problem.

  


  I used several libraries, including Opencv, ffmpeg, and others, and got the same
'[rtsp @ ] method DESCRIBE failed : 401 Unauthorized' and only this error appears

  


  What could be the cause,,, please help...

  


  import cv2

url = "rtsp://username:password@camera_ip:554/stream_path"

cap = cv2.VideoCapture(url)

if not cap.isOpened():
    print("Failed to open RTSP stream.")
    exit()

while True:
    ret, frame = cap.read()
    if not ret:
        print("Failed to read frame.")
        break
    cv2.imshow('RTSP Stream', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()


  


  I tried running the above code and debugging it using the ffmpeg library.