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• FFMPEG and Mencoder building screenshot returns 0 size images

  12 avril 2014, par Genus

  I have a script and it used to work fine but suddenly it stopped working and giving me zero size images as screenshot after video convert.

  here is the command for video screenshot.

  $cmd = $GLOBALS["paths"]["ffmpeg"]." -y -i ".$file." -f mjpeg -r 1 -ss ".$time." -vframes 1 -an ".$tmpdir."/00000001.jpg 2>&1";
  
      exec($cmd,$results);

  Debug :

  -----------------------------------------------------
  
  
  
  ------------mencoder_and_fmpeg.php SCREENSHOT -------
  
  
  
  -----------------------------------------------------
  
  
  
    COMMAND: ffmpeg -y -i /home/TESTING/public_html/vid/6d/ad/29/6dad2946a2ba102.flv -f mjpeg -r 1 -ss 14.48 -vframes 1 -an /home/TESTING/public_html/scr/42/3a/92/00000001.jpg 2>&1
  
  
  
    FFmpeg version SVN-r16244, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  
  
  
    configuration: --disable-mmx --enable-shared --enable-libvorbis --enable-gpl --enable-swscale --enable-pthreads --disable-static --disable-demuxer=v4l --disable-demuxer=v4l2 --enable-libtheora --enable-gpl --enable-libspeex --enable-libmp3lame --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libamr-nb --enable-libamr-wb --enable-nonfree --enable-libxvid
  
    libavutil     49.12. 0 / 49.12. 0
  
    libavcodec    52. 7. 0 / 52.108. 0
  
    libavformat   52.23. 1 / 52.92. 0
  
    libavdevice   52. 1. 0 / 52. 2. 3
  
    libswscale     0. 6. 1 /  0.12. 0
  
  
  
    built on Apr  9 2011 22:48:41, gcc: 4.1.2 20080704 (Red Hat 4.1.2-50)
  
    built by Admin-Ahead Server Technologies FFmpeg installer v5.0.6b
  
    Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 10.92 (131/12)
  
    Stream mapping:
  
    Stream #0.0 -> #0.0
  
  
  
    Press [q] to stop encoding
  
    ffmpeg: symbol lookup error: ffmpeg: undefined symbol: frame_hook_process

• 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.

  


• 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.