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• Nginx RTMP "Server Error : No Such Stream"

  7 août 2024, par Tony Ruth

  I am trying to capture and stream video within my network 10.100.64.1/24 using libnginx-mod-rtmp. I followed a tutorial. I used the same URL for publishing and playing : rtmp ://10.100.64.4/lab/test But the player does not find the stream.

  


  My nginx settings :

  


  rtmp {

    server {

        listen 1935;
        chunk_size 4096;
        allow publish 127.0.0.1;
        allow publish 10.100.64.4/24;
        deny publish all;
        allow play 127.0.0.1;
        allow play 10.100.64.4/24;
        deny play all;

        application lab {

            live on;
            idle_streams off;
            record all;
            record_path /media/HLEV/GoPro/Raw;
            record_unique on;
        } 
    }
} 


  


  The server lives on 10.100.64.4, so I published a video using ffmpeg :

  


  ffmpeg -stream_loop -1 -re -i MyVideo.flv -c:v copy -c:a aac -ar 44100 -ac 1 -f flv -flvflags no_duration_filesize rtmp://10.100.64.4/lab/test


  


  The publishing looks good. Last line of the above command :

  


  frame=54030 fps= 60 q=-1.0 size=  119584kB time=00:15:01.00 bitrate=1087.3kbits/s speed=   1x 


  


  And I can see that the video is being saved locally from the record block of the nginx settings.

  


  Then I try to play the stream using ffplay :

  


  ffplay -i rtmp://10.100.64.4/lab/test
ffplay version 5.1.5-0+deb12u1 Copyright (c) 2003-2024 the FFmpeg developers
  built with gcc 12 (Debian 12.2.0-14)
  configuration: --prefix=/usr --extra-version=0+deb12u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[rtmp @ 0x7fe7940015c0] Server error: No such stream=    0B f=0/0   
rtmp://127.0.0.1/lab/test: Operation not permitted
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0 


  


  ffplay does not find the stream.

  


  I can observe both the publish and play commands by examine the access log of nginx :

  


  sudo tail -2 /var/log/nginx/access.log 
10.100.64.4 [07/Aug/2024:12:24:56 -0500] PUBLISH "lab" "test" "" - 45365243 529 "" "FMLE/3.0 (compatible; Lavf59.27" (5m 36s)
10.100.64.4 [07/Aug/2024:12:25:03 -0500] PLAY "lab" "test" "" - 368 412 "" "LNX 9,0,124,2" (0s)


  


  I have tried using different video streams (directly from a webcam instead of from ffmpeg). I have also tried using different players (VLC instead of ffplay).

  


  How do I connect to the stream ?
Do you need different URLs for publishing versus playing ? The way I understood it, publishing is on port 1395 and playing is on port 80, so there is no conflict with using the same URL.
Is there a way to list the currently active streams on my server ?

  


• How can i list all the audio devices on my pc using ffmpeg ? [closed]

  12 octobre 2024, par Daniel Lip

  I'm using ffmpeg version : 2024-07-10

  


  I tried this cmd command after running the cmd as admin.

  


  ffmpeg -list_devices true -f dshow -i dummy


  


  but the result is :

  


  D:\>ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version 2024-07-10-git-1a86a7a48d-essentials_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      59. 28.100 / 59. 28.100
  libavcodec     61. 10.100 / 61. 10.100
  libavformat    61.  5.101 / 61.  5.101
  libavdevice    61.  2.100 / 61.  2.100
  libavfilter    10.  2.102 / 10.  2.102
  libswscale      8.  2.100 /  8.  2.100
  libswresample   5.  2.100 /  5.  2.100
  libpostproc    58.  2.100 / 58.  2.100
[dshow @ 000001c1e700f200] Could not enumerate video devices (or none found).
[dshow @ 000001c1e700f200] Could not enumerate audio only devices (or none found).
[in#0 @ 000001c1e700ee00] Error opening input: Immediate exit requested
Error opening input file dummy.


  


• Understanding User Flow : Eight Practical Examples for Better UX

  4 octobre 2024, par Daniel Crough — Analytics Tips, UX

  Imagine trying to cook a complex dish without a recipe. You might have all the ingredients, but without a clear sequence of steps, you’re likely to end up with a mess rather than a masterpiece. Similarly, designing a website without understanding user flow is a recipe for confusion and lost conversions.

  User flows—the paths visitors take through your site—are the recipes for digital success. They provide a clear sequence of steps that guide users towards their goals, whether that’s making a purchase, signing up for a newsletter, or finding information. By understanding and optimising these flows, you can create a website that’s not just functional, but delightfully intuitive.

  In this article, we’ll explore seven practical user flow examples and show you how to apply these insights using web analytics tools. Whether you’re new to user experience (UX) design or a seasoned professional, you’ll find valuable takeaways to enhance your digital strategy.

  Read More