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• FFMPEG : Reconnect not working for HTTP source with UDP output [closed]

  5 octobre 2023, par Quinnell

  I am streaming an audio input with a static video slate. Audio comes from an HTTP source. I output to a multicast IP via UDP.

  


  The stream periodically fails. The process needs to be killed and manually restarted. Would like to have the stream automatically reconnect itself upon failure.

  


  Server runs CentOS 7.
FFMPEG version : ffmpeg version N-107408-g882aac99d2 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-44)

  


  The server will eventually be replaced with AlmaLinux 8.8 running the latest version of ffmpeg.

  


  Currently experimenting with the RECONNECT option but so far it has failed to restore the stream automatically.

  


  note : IPs and identifying variables have been sanitized.

  


  #! /bin/bash

filename="test1.yuv"
streamTitle="Reconnect_TEST1" # friendly name for stream. Helps when running pgrep
streamInput="100.100.100.100:8002" # Input IP:Port we're receiving on.
multicastOut="232.100.100.100:5500" # Multicast IP:Port we're sending to
logFile=/home/username/logs/${streamTitle}.log # Log file we output the nohup data to.

nohup ffmpeg \
    -re \
    -video_size 854x480 \
    -i $filename \
    -i http://${streamInput} \
    -reconnect 1 \
    -reconnect_at_eof 1 \
    -reconnect_streamed 1 \
    -reconnect_on_network_error 1 \
    -reconnect_on_http_error 1 \
    -reconnect_delay_max 10 \
    -c:a ac3 \
    -ac 1 \
    -af loudnorm \
    -vf loop=loop=-1:size=1:start=0 \
    -c:v libx264 \
    -profile:v main \
    -s:v 854x480 \
    -aspect 16:9 \
    -r 15 -g 30 -bf 0 -crf 30 \
    -fflags +genpts -flags +cgop+ilme \
    -metadata title=$streamTitle \
    -metadata:s:a:0 language=eng \
    -mpegts_flags +pat_pmt_at_frames \
    -flush_packets 0 -threads 1 \
    -v verbose \
    -f mpegts udp://${multicastOut}?pkt_size=1316 \
    -loglevel verbose >$logFile &


  


• FFmpeg help, how should I use FFmpeg ? [closed]

  11 septembre 2023, par Señor Tonto

  I'm trying to use FFmpeg in my code, which is a C++ win32 application that I'm coding from Visual Studio Code 2022. I've downloaded FFmpeg from the BtnB Github that they link in their offical site as a pre-built binary. Now, I got the shared version, as I believed this would both have the command-line .exe app & the normal code headers & libraries. I tried using some code inside of my main.cpp to decode frames from .mp4 files as a test. For some reason though, on launch I got these errors : avcodec-60.dll cannot be found, avformat-60.dll cannot be found, avutil-58.dll cannot be found, swscale-7.dll cannot be found. So now I'm wondering why aren't these provided in the shared code ? there are only dll.a files but no actual .dll files, I also found .def files with the names of the .dll files I am apparently missing, now I want to know why these .dll files aren't provided. Do I need to build from source for that ? Or should I just forget using the .h & .lib files of FFmpeg & use the command-line app ? Any help appreciated.

  


  I want to use FFmpeg, but I can't find any guidance as to whether to use the command-line tool or the code function that aren't working due to the absent .dll filess

  


• Ffmpeg configuration to stream the frames of my webcam

  6 juillet 2023, par Ridweng

  I'm trying to build a server in NodeJs to stream in RTSP my webcam using Angular to retrieve the frames and connecting using websockets. The server side is using "express-ws" module to create the Websocket.

  


  I was successfull in sending the frames from the webcam to the server in base64, the server is receiving these messages from a function on interval of (1000 / 30)ms.

  


  The issue relies on the implementation of my Ffmpeg child process. I retrieve the message and convert it into a buffer to then write this in the function of Ffmpeg.

  


  My current implementation is this one :

  


  const { spawn } = require('child_process');
exports.stream =  (ws ,req) => {
    try{
        const mess = `connection from: ${req._remoteAddress} at ${req._startTime}.`
        const initialMess =`Started ${mess}`
        ws.uuid = uuidv4()
        console.log(initialMess)

        ws.on('message', function incoming(message) {
            message = JSON.parse(message)
            console.log(`Res: ${message.width} x ${message.height}`);
            const ffmpeg = spawn('ffmpeg', [
                '-f', 'rawvideo',
                '-pixel_format', 'rgb24',
                '-video_size', `${message.width}x${message.height}`,
                '-framerate', `${message.framerate}`,
                '-i', '-',
                '-codec:v', 'libx264',
                '-preset', 'ultrafast',
                '-tune', 'zerolatency',
                '-f', 'rtsp',
                'rtsp://127.0.0.1:554/rtsp/stream',
            ]);
            const base64Data = message.video;
            const videoData = Buffer.from(base64Data, 'base64');

            ffmpeg.stdin.write(videoData);
            ffmpeg.stdin.end();
            
            ffmpeg.stderr.on('data', (data) => {
                console.error(`FFmpeg : ${data}`);
                });

            ffmpeg.on('exit', (code, signal) => {
                if (dev) console.log(`FFmpeg process exited with code ${code} and signal ${signal}`);
        
                // Close the WebSocket connection
                ws.close();
                });
        });
        ws.on('close', () => {
            const finalMess = `Stopped ${mess}`
            rem(ws.uuid)
            console.log(finalMess)
        })
    }catch(err){
        console.log(err)
    }
}


  


  In terms of the message received, this is the Angular side sending the message :

  


  const imageData = this.canvas.toDataURL('image/jpeg');
socket.send(JSON.stringify({video: imageData, width: this.canvas.width, height: this.canvas.height, framerate: interval }));


  


  The interval variable is the divisor of the interval that is triggering the function (in this case 30).

  


  I'm currently receiving the error message from Ffmpeg :

  


  ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)

FFmpeg :   configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100

FFmpeg : [rawvideo @ 0x150005ff0] Packet corrupt (stream = 0, dts = 0).

FFmpeg : Input #0, rawvideo, from 'fd:':
  Duration: N/A, start: 0.000000, bitrate: 221184 kb/s
  Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 640x480, 221184 kb/s, 30 tbr, 30 tbn

FFmpeg : Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))

FFmpeg : fd:: corrupt input packet in stream 0
[rawvideo @ 0x14ef24290] Invalid buffer size, packet size 76343 < expected frame_size 921600

FFmpeg : Error while decoding stream #0:0: Invalid argument

FFmpeg : [libx264 @ 0x14ef25a20] using cpu capabilities: ARMv8 NEON

FFmpeg : [libx264 @ 0x14ef25a20] profile High 4:4:4 Predictive, level 3.0, 4:4:4, 8-bit

FFmpeg : [libx264 @ 0x14ef25a20] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=7 lookahead_threads=7 sliced_threads=1 slices=7 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0

FFmpeg : [tcp @ 0x1500078a0] Connection to tcp://127.0.0.1:554?timeout=0 failed: Connection refused
[out#0/rtsp @ 0x14ef24b00] Could not write header (incorrect codec parameters ?): Connection refused

FFmpeg : [vost#0:0/libx264 @ 0x14ef256d0] Error initializing output stream: 

FFmpeg : Conversion failed!

FFmpeg process exited with code 1 and signal null


  


  This is the reason I believe the issue relies on the configuration of Ffmpeg and how to set it for this case. It would be great to being able to play this RTSP link in my VLC to conclude it as successfull.

  


  I would apreciate any suggestions or guidence.
Thanks in advance.