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• Reading from RTSP stream via opencv+ffmpeg results in "method SETUP failed : 501 Not Implemented"

  7 novembre 2023, par bearyTheBear

  I have a camera setup and running in my local network.
I can see the video stream via VLC without any issues.
Now I am trying to run the following code to also observe the stream with python + opencv.

  


  I am using :

  


  

  • Python 3.11

  


  • opencv-python 4.8.1.78

  


  


  import cv2

cap = cv2.VideoCapture(
    "rtsp://192.168.234.127:8554/h264", 
)

while cap.isOpened():
    status, frame = cap.read()
    
    cv2.namedWindow("frame", cv2.WINDOW_NORMAL)
    cv2.imshow("frame", frame)
    
    if cv2.waitKey(20) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()


  


  This results in the script being stuck at cap.read() with the following error occuring in the background : [rtsp @ 0000020008b7cd40] method SETUP failed: 501 Not Implemented. Note that cap.isOpened() returns True.

  


  I tried :

  


  

  • downgrading to Python 3.11 from 3.12

  


  • running this in jupyter notebook

  


  • running this directly from script

  


  • force reinstalling opencv-python

  


  • using "rtsp ://192.168.234.127:8554/jpeg" instead of "rtsp ://192.168.234.127:8554/h264"

    

    • note that both methods work in the VLC player

    


    


  


  


  edit :

  


  

  • simplified code, same result.

  


  


• Why failes ffmpeg with "Failed to inject frame into filter network : Internal bug, should not have happened" ?

  17 octobre 2023, par StackOverRigge

  I want to convert a MP4 video file into an animated gif file using ffmpeg. I am trying to do this in two steps :

  


  

  1. Create a palette image

  


  2. Convert the MP4 with the help of the palette image to a GIF file

  


  


  I'm using ffmpeg 6.0 essentials_build.

  


  First, I create a palette image :

  


  ffmpeg -v warning -i video.mp4 -vf "fps=15,scale=1366:768:flags=lanczos,palettegen=stats_mode=diff" -y palette.png


  


  Then, I'm trying to convert the MP4 to GIF :

  


  ffmpeg -i video.mp4 -i palette.png -lavfi "fps=15,scale=1366:768:flags=lanczos,paletteuse=dither=bayer:bayer_scale=5:diff_mode=rectangle" -y video.gif


  


  This command ends in this error message :

  


  Error while filtering: Internal bug, should not have happeneditrate=4279.9kbits/s speed=0.742x
Failed to inject frame into filter network: Internal bug, should not have happened
Error while processing the decoded data for stream #0:0


  


• ffmpeg and libaom compilation failed "unable to open include file `third_party/x86inc/x86inc.asm"

  7 octobre 2023, par sam

  I'm trying to build ffmpeg using this guide :
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  


  the problem is when i try to compile libaom using the following commands :

  


  cd ~/ffmpeg_sources && \
git -C aom pull 2> /dev/null || git clone --depth 1 https://aomedia.googlesource.com/aom && \
mkdir -p aom_build && \
cd aom_build && \
PATH="$HOME/bin:$PATH" cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$HOME/ffmpeg_build" -DENABLE_TESTS=OFF -DENABLE_NASM=on ../aom && \
PATH="$HOME/bin:$PATH" make && \
make install


  


  i get the following error :

  


  /root/ffmpeg_sources/aom/aom_dsp/x86/sad4d_sse2.asm:14: fatal: unable to open include file `third_party/x86inc/x86inc.asm'
CMakeFiles/aom_dsp_encoder_sse2.dir/build.make:62: recipe for target 'CMakeFiles/aom_dsp_encoder_sse2.dir/aom_dsp/x86/sad4d_sse2.asm.o' failed
make[2]: *** [CMakeFiles/aom_dsp_encoder_sse2.dir/aom_dsp/x86/sad4d_sse2.asm.o] Error 1
CMakeFiles/Makefile2:842: recipe for target 'CMakeFiles/aom_dsp_encoder_sse2.dir/all' failed
make[1]: *** [CMakeFiles/aom_dsp_encoder_sse2.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2


  


  Is there any fix for this issue ?