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• FFMPEG HTTP Stream error, failed : Connection refused

  17 juillet 2022, par Halo Gass

  I tried to stream a video frame from opencv to network using MPEG-Dash, HLS, or RTSP via FFMPEG, but everytime I tried everything, it always throw "Connection Error, Connection Refused" even streaming to 127.0.0.1.

  


  Here the code for testing :

  


  import subprocess
import cv2
rtmp_url = "rtmp://127.0.0.1:1935/stream/pupils_trace"

# webcamera is 0, also you can set a video file name instead, for example "/home/user/demo.mp4"
path = 0
cap = cv2.VideoCapture(path)

# gather video info to ffmpeg
fps = int(cap.get(cv2.CAP_PROP_FPS))
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))

# command and params for ffmpeg
command = ['ffmpeg',
           '-y',
           '-f', 'rawvideo',
           '-vcodec', 'rawvideo',
           '-pix_fmt', 'bgr24',
           '-s', "{}x{}".format(width, height),
           '-r', str(fps),
           '-i', '-',
           '-c:v', 'libx264',
           '-pix_fmt', 'yuv420p',
           '-preset', 'ultrafast',
           '-f', 'flv',
           rtmp_url]

# using subprocess and pipe to fetch frame data
p = subprocess.Popen(command, stdin=subprocess.PIPE)


while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        print("frame read failed")
        break

    # YOUR CODE FOR PROCESSING FRAME HERE

    # write to pipe
    p.stdin.write(frame.tobytes())


  


  and below is the log :

  


  ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers&#xA;  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)&#xA;  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared&#xA;  libavutil      56. 31.100 / 56. 31.100&#xA;  libavcodec     58. 54.100 / 58. 54.100&#xA;  libavformat    58. 29.100 / 58. 29.100&#xA;  libavdevice    58.  8.100 / 58.  8.100&#xA;  libavfilter     7. 57.100 /  7. 57.100&#xA;  libavresample   4.  0.  0 /  4.  0.  0&#xA;  libswscale      5.  5.100 /  5.  5.100&#xA;  libswresample   3.  5.100 /  3.  5.100&#xA;  libpostproc    55.  5.100 / 55.  5.100&#xA;Input #0, rawvideo, from &#x27;pipe:&#x27;:&#xA;  Duration: N/A, start: 0.000000, bitrate: 221184 kb/s&#xA;    Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 1280x720, 221184 kb/s, 10 tbr, 10 tbn, 10 tbc&#xA;[tcp @ 0x556bea198680] Connection to tcp://127.0.0.1:1935 failed: Connection refused&#xA;[rtmp @ 0x556bea1a2640] Cannot open connection tcp://127.0.0.1:1935&#xA;rtmp://127.0.0.1:1935/stream/pupils_trace: Connection refused&#xA;Traceback (most recent call last):&#xA;  File "testing.py", line 42, in <module>&#xA;    p.stdin.write(frame.tobytes())&#xA;</module>

  


  Here what I tried (All of it always "Connection Refused")

  


  

  1. Running the code directly

  


  2. Running the code using sudo

  


  3. Run with 'sudo su'

  


  4. Allow the port used in ufw

  


  5. Disable ufw

  


  6. I tried executing command directly in terminal, also throws "connection refused"

  


  7. using 127.0.0.1 or "localhost" or 0.0.0.0 or my local IP, everything throws connection error

  


  8. Tried UDP and TCP

  


  


  Anyone can help me ?
Thanks

  


• FFMPEG:Invalid buffer size when converting video

  30 juillet 2022, par Sar sinua

  I'm trying to Pipe bytes in to FFMPEG in python and I've faced a problem.

  


  import subprocess
from io import BytesIO

with open('input.mp4', 'rb') as f:
    input_byte=f.read()
command='ffmpeg -y -f rawvideo -video_size 320x240 -pixel_format yuv420p -framerate 15 -i pipe:0 -codec:a copy out.mp4'
process = subprocess.Popen(command, stdin=subprocess.PIPE, shell=True)

process.stdin.write(input_byte)
process.stdin.close()


  


  The error I get is Invalid buffer size, packet size 63420 < expected frame_size 115200 Error while decoding stream #0:0: Invalid argument

  


  You can download the video from here.

  


  ffmpeg version 2022-05-12-git-30e2bb0f64-full_build-www.gyan.dev

  


• Why A .FLAC File Converted by FFMPEG Cause File Explorer Unresponse on Windows 10 [closed]

  20 juillet 2022, par Alex King

  My File Explorer Always showing "Working on it."
I've tried many resolutions.
First,I disconnect my NAS drive. seems fine.
I test many times on diffirient windows 10/11 versions.
I thought it was SMB problem on windows. But i was wrong.

  


  Today I'm using FFMPEG convert .wav to .flac.

  


  .\ffmpeg.exe -i $Source -c:a flac $Dest 


  


  Just simple like this. Blow my computer up.

  


  Even worse, explorer.exe crash after I'm trying to open FF output folder.

  


  It's not the poblem from "Quick access" or "Search Index".

  


  I'm now 100% percent confirm the flac files that ffmpeg made will cause file explorer crash.

  


  I can't solve it without knowing the reason.

  


  Might related to audio file tag vorbis ?

  


  This is my FFMPEG info

  


  ffmpeg version n5.0.1-4-ga5ebb3d25e-20220428 Copyright (c) 2000-2022 the FFmpeg developers

built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)