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• Can't get GCC's -static-libgcc working with DYLIB libraries on Mac OS X

  15 novembre 2024, par Synthetix

  I've installed GCC 4.6.3 into a non-system path on a Mac system and it works fine. However, GCC wants to use code from libgcc for all the binaries I compile, and running otool -L shows that these compiled programs look for libgcc_s.1.dylib in GCC's install path. I can override this by passing -static-libgcc, which just compiles the stuff needed into the binary and that's fine. The problem is this only seems to work with executables, not shared libraries. If I use GCC to compile some third-party lib I want to use in one of my programs as a .dylib, these libraries still look for libgcc_s.1.dylib in the local GCC install path even if I specify -static-libgcc ! Needless to say, this is a problem as there's no guarantee that those libraries will find libgcc when run on some other system.

  



  I tried this with ffmpeg. If I look at config.log, the -static-libgcc is most certainly being used. GCC is just not linking libgcc statically with the resulting dylibs. I even tried the -nostdlib, -nostartfiles and -nodefaultlibs options but they were ignored. Again, I checked config.log and they're definitely there !

  


• Need to install ffmpeg (non static) for my discord bot (node.js) hosted on Heroku

  23 mars 2023, par febkosq8

  I host my Discord Bot on Heroku.

  


  I was using the static ffmpeg buildpack by jonathanong until now.

  


  Due to some issues with Discord-Player package that I use to play music, I will have to use non static version of ffmpeg (See Issue #1639 for more info).

  


  I tried using the aptFile buildpack to install ffmpeg directly.
The build process takes place without any issues. See build log (Pastebin Logs).

  


  But after deploy, I am not able to access ffmpeg.

  


  I keep getting
ffmpeg: error while loading shared libraries: libusb-1.0.so.0: cannot open shared object file: No such file or directory when i try to run ffmpeg thro heroku run command. The bot is also not able to pickup ffmpeg.

  


  ffmpeg fails to run

  


  I am using heroku stack-20 because it was a workaround to the github issue mentioned earlier. The issue exists in stack-22 also.

  


  Need help to figure out a solution for this problem or a way to install non static versions of ffmpeg

  


• 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