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• 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.


  


• 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 ?

  


• using mediamtx to stream video to browser [closed]

  18 octobre 2024, par Maximilian

  I am using rtsp to feed a video stream to mediamtx.

  


  I want to display the feed in a browser but always get some errors.

  


  I use the following to start mediamtx

  


  podman run --rm -it -e MTX_PROTOCOLS=tcp -e MTX_WEBRTCADDITIONALHOSTS=192.168.x.x -p 8554:8554 -p 1935:1935 -p 8888:8888 -p 8889:8889 -p 8890:8890/udp -p 8189:8189/udp docker.io/bluenviron/mediamtx


  


  I use this ffmpeg line to feed mediamtx :

  


  ffmpeg -i "rtsp://127.0.0.1:10000/test" -f rtsp rtsp://127.0.0.1:8554/feed


  


  I can view the feed with

  


  ffplay  rtsp://localhost:8554/feed


  


  ffplay says some things about my stream

  


  the mediamtx stream

  


  Input #0, rtsp, from 'rtsp://localhost:8554/feed':
  Metadata:
    title           : Session streamed with GStreamer
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: mpeg4 (Simple Profile), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 30 tbr, 90k tbn, 30 tbc


  


  the source stream

  


  Input #0, rtsp, from 'rtsp://localhost:10000/test':
  Metadata:
    title           : Session streamed with GStreamer
    comment         : rtsp-server
  Duration: N/A, start: 0.199989, bitrate: N/A
  Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(tv, smpte170m, progressive), 320x240 [SAR 1:1 DAR 4:3], 30 fps, 30 tbr, 90k tbn, 60 tbc


  


  I use this html code try to display the video :

  


  
    



  


  mediamtx gives the following output when the browser tries to connect :

  


  2024/10/18 07:52:51 INF [RTSP] [session 7fe6a91a] created by 10.0.2.100:57542
2024/10/18 07:52:51 INF [RTSP] [session 7fe6a91a] is publishing to path 'feed', 1 track (MPEG-4 Video)
2024/10/18 07:52:52 INF [WebRTC] [session 9d4fb884] created by 10.0.2.100:55070
2024/10/18 07:52:52 INF [WebRTC] [session 9d4fb884] closed: the stream doesn't contain any supported codec, which are currently AV1, VP9, VP8, H264, Opus, G722, G711, LPCM


  


  The stream is clearly h264... why is it complaining ?