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Somos millones 1
21 juillet 2014, par
Mis à jour : Juin 2015
Langue : français
Type : Video
Autres articles (63)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...) -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (12222)
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ffmpeg pipe process ends right after writing first buffer data to input stream and does not keep running
6 mai, par Taketo MatsunagaI have been trying to convert 16bit PCM (s16le) audio data to webm using ffmpeg in C#.
But the process ends right after the writing the first buffer data to standard input.
I has exited with the status 0, meaning success. But do not know why....
Could anyone tell me why ?


I apprecite it if you could support me.


public class SpeechService : ISpeechService
 {
 
 /// <summary>
 /// Defines the _audioInputStream
 /// </summary>
 private readonly MemoryStream _audioInputStream = new MemoryStream();

 public async Task SendPcmAsWebmViaWebSocketAsync(
 MemoryStream pcmAudioStream,
 int sampleRate,
 int channels) 
 {
 string inputFormat = "s16le";

 var ffmpegProcessInfo = new ProcessStartInfo
 {
 FileName = _ffmpegPath,
 Arguments =
 $"-f {inputFormat} -ar {sampleRate} -ac {channels} -i pipe:0 " +
 $"-f webm pipe:1",
 RedirectStandardInput = true,
 RedirectStandardOutput = true,
 RedirectStandardError = true,
 UseShellExecute = false,
 CreateNoWindow = true,
 };

 _ffmpegProcess = new Process { StartInfo = ffmpegProcessInfo };

 Console.WriteLine("Starting FFmpeg process...");
 try
 {

 if (!await Task.Run(() => _ffmpegProcess.Start()))
 {
 Console.Error.WriteLine("Failed to start FFmpeg process.");
 return;
 }
 Console.WriteLine("FFmpeg process started.");

 }
 catch (Exception ex)
 {
 Console.Error.WriteLine($"Error starting FFmpeg process: {ex.Message}");
 throw;
 }

 var encodeAndSendTask = Task.Run(async () =>
 {
 try
 {
 using var ffmpegOutputStream = _ffmpegProcess.StandardOutput.BaseStream;
 byte[] buffer = new byte[8192]; // Temporary buffer to read data
 byte[] sendBuffer = new byte[8192]; // Buffer to accumulate data for sending
 int sendBufferIndex = 0; // Tracks the current size of sendBuffer
 int bytesRead;

 Console.WriteLine("Reading WebM output from FFmpeg and sending via WebSocket...");
 while (true)
 {
 if ((bytesRead = await ffmpegOutputStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
 {
 // Copy data to sendBuffer
 Array.Copy(buffer, 0, sendBuffer, sendBufferIndex, bytesRead);
 sendBufferIndex += bytesRead;

 // If sendBuffer is full, send it via WebSocket
 if (sendBufferIndex >= sendBuffer.Length)
 {
 var segment = new ArraySegment<byte>(sendBuffer, 0, sendBuffer.Length);
 _ws.SendMessage(segment);
 sendBufferIndex = 0; // Reset the index after sending
 }
 }
 }
 }
 catch (OperationCanceledException)
 {
 Console.WriteLine("Encode/Send operation cancelled.");
 }
 catch (IOException ex) when (ex.InnerException is ObjectDisposedException)
 {
 Console.WriteLine("Stream was closed, likely due to process exit or cancellation.");
 }
 catch (Exception ex)
 {
 Console.Error.WriteLine($"Error during encoding/sending: {ex}");
 }
 });

 var errorReadTask = Task.Run(async () =>
 {
 Console.WriteLine("Starting to read FFmpeg stderr...");
 using var errorReader = _ffmpegProcess.StandardError;
 try
 {
 string? line;
 while ((line = await errorReader.ReadLineAsync()) != null) 
 {
 Console.WriteLine($"[FFmpeg stderr] {line}");
 }
 }
 catch (OperationCanceledException) { Console.WriteLine("FFmpeg stderr reading cancelled."); }
 catch (TimeoutException) { Console.WriteLine("FFmpeg stderr reading timed out (due to cancellation)."); }
 catch (Exception ex) { Console.Error.WriteLine($"Error reading FFmpeg stderr: {ex.Message}"); }
 Console.WriteLine("Finished reading FFmpeg stderr.");
 });

 }

 public async Task AppendAudioBuffer(AudioMediaBuffer audioBuffer)
 {
 try
 {
 // audio for a 1:1 call
 var bufferLength = audioBuffer.Length;
 if (bufferLength > 0)
 {
 var buffer = new byte[bufferLength];
 Marshal.Copy(audioBuffer.Data, buffer, 0, (int)bufferLength);

 _logger.Info("_ffmpegProcess.HasExited:" + _ffmpegProcess.HasExited);
 using var ffmpegInputStream = _ffmpegProcess.StandardInput.BaseStream;
 await ffmpegInputStream.WriteAsync(buffer, 0, buffer.Length);
 await ffmpegInputStream.FlushAsync(); // バッファをフラッシュ
 _logger.Info("Wrote buffer data.");

 }
 }
 catch (Exception e)
 {
 _logger.Error(e, "Exception happend writing to input stream");
 }
 }

</byte>

Starting FFmpeg process...
FFmpeg process started.
Starting to read FFmpeg stderr...
Reading WebM output from FFmpeg and sending via WebSocket...
[FFmpeg stderr] ffmpeg version 7.1.1-essentials_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
[FFmpeg stderr] built with gcc 14.2.0 (Rev1, Built by MSYS2 project)
[FFmpeg stderr] 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
[FFmpeg stderr] libavutil 59. 39.100 / 59. 39.100
[FFmpeg stderr] libavcodec 61. 19.101 / 61. 19.101
[FFmpeg stderr] libavformat 61. 7.100 / 61. 7.100
[FFmpeg stderr] libavdevice 61. 3.100 / 61. 3.100
[FFmpeg stderr] libavfilter 10. 4.100 / 10. 4.100
[FFmpeg stderr] libswscale 8. 3.100 / 8. 3.100
[FFmpeg stderr] libswresample 5. 3.100 / 5. 3.100
[FFmpeg stderr] libpostproc 58. 3.100 / 58. 3.100

[2025-05-06 15:44:43,598][INFO][XbLogger.cs:85] _ffmpegProcess.HasExited:False
[2025-05-06 15:44:43,613][INFO][XbLogger.cs:85] Wrote buffer data.
[2025-05-06 15:44:43,613][INFO][XbLogger.cs:85] Wrote buffer data.
[FFmpeg stderr] [aist#0:0/pcm_s16le @ 0000025ec8d36040] Guessed Channel Layout: mono
[FFmpeg stderr] Input #0, s16le, from 'pipe:0':
[FFmpeg stderr] Duration: N/A, bitrate: 256 kb/s
[FFmpeg stderr] Stream #0:0: Audio: pcm_s16le, 16000 Hz, mono, s16, 256 kb/s
[FFmpeg stderr] Stream mapping:
[FFmpeg stderr] Stream #0:0 -> #0:0 (pcm_s16le (native) -> opus (libopus))
[FFmpeg stderr] [libopus @ 0000025ec8d317c0] No bit rate set. Defaulting to 64000 bps.
[FFmpeg stderr] Output #0, webm, to 'pipe:1':
[FFmpeg stderr] Metadata:
[FFmpeg stderr] encoder : Lavf61.7.100
[FFmpeg stderr] Stream #0:0: Audio: opus, 16000 Hz, mono, s16, 64 kb/s
[FFmpeg stderr] Metadata:
[FFmpeg stderr] encoder : Lavc61.19.101 libopus
[FFmpeg stderr] [out#0/webm @ 0000025ec8d36200] video:0KiB audio:1KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 67.493113%
[FFmpeg stderr] size= 1KiB time=00:00:00.04 bitrate= 243.2kbits/s speed=2.81x
Finished reading FFmpeg stderr.
[2025-05-06 15:44:44,101][INFO][XbLogger.cs:85] _ffmpegProcess.HasExited:True
[2025-05-06 15:44:44,132][ERROR][XbLogger.cs:67] Exception happend writing to input stream
System.ObjectDisposedException: Cannot access a closed file.
 at System.IO.FileStream.WriteAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
 at System.IO.Stream.WriteAsync(Byte[] buffer, Int32 offset, Int32 count)
 at EchoBot.Media.SpeechService.AppendAudioBuffer(AudioMediaBuffer audioBuffer) in C:\Users\tm068\Documents\workspace\myprj\xbridge-teams-bot\src\EchoBot\Media\SpeechService.cs:line 242


I am expecting the ffmpeg process keep running.


-
avformat/iamfdec : Check side_substream_id before use
22 avril, par Michael Niedermayer -
Multicast video stream from Dahua IP surveillance camera - ffmpeg etc [closed]
23 mai, par Jaroslav MazurakI have a Dahua IP surveillance camera and want to get the video via a multicast stream.


In the camera settings, I enabled Multicast streaming, IP 239.240.1.2, and port 40000 (the default). The RTSP port is 554 (the default).


Neither VLC 3.0.21 nor ffmpeg 7.1.1 work when I try to use multicast. Both of them work when I use a unicast. OS is Windows 11 x64. Both applications are allowed in the Windows firewall (any protocol, all networks ; same result if the firewall is disabled completely). I have Wireshark installed, and I see that when a client requests the stream via RTSP, the multicast traffic from the camera is present ; ffmpeg determines the stream but doesn't capture any video, and the output file is empty (it contains only the header and no video). When I use unicast, the correct output video file is saved.


I have no idea what I'm doing wrong, and why ffmpeg (and VLC) doesn't capture anything in the multicast mode.


Here are the ffmpeg logs for multicast and unicast modes.


Multicast :


ffmpeg -fflags nobuffer -flags low_delay -timeout 10M -stats -rtsp_transport udp_multicast -i "rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0&unicast=false" -acodec copy -vcodec copy -y output.mkv

ffmpeg version 7.1.1-full_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
 built with gcc 14.2.0 (Rev1, Built by MSYS2 projffmpeg -fflags nobuffer -flags low_delay -timeout 10M -stats -i "rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0" -acodec copy -vcodec copy -y output.mkv

ffmpeg version 7.1.1-full_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
 built with gcc 14.2.0 (Rev1, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2 --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 59. 39.100 / 59. 39.100
 libavcodec 61. 19.101 / 61. 19.101
 libavformat 61. 7.100 / 61. 7.100
 libavdevice 61. 3.100 / 61. 3.100
 libavfilter 10. 4.100 / 10. 4.100
 libswscale 8. 3.100 / 8. 3.100
 libswresample 5. 3.100 / 5. 3.100
 libpostproc 58. 3.100 / 58. 3.100
Input #0, rtsp, from 'rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0':
 Metadata:
 title : Media Server
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, 25 fps, 25 tbr, 90k tbn
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
Output #0, matroska, to 'output.mkv':
 Metadata:
 title : Media Server
 encoder : Lavf61.7.100
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, q=2-31, 25 fps, 25 tbr, 1k tbn
Press [q] to stop, [?] for help
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=00:00:01.32 bitrate= 0.0kbits/s speed= 2.6x 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=00:00:01.84 bitrate= 0.0kbits/s speed=1.81x 
frame= 10 fps=6.5 q=-1.0 size= 1KiB time=00:00:02.36 bitrate= 2.2kbits/s speed=1.53x 
frame= 23 fps= 11 q=-1.0 size= 1KiB time=00:00:02.88 bitrate= 1.8kbits/s speed= 1.4x 
frame= 36 fps= 14 q=-1.0 size= 1KiB time=00:00:03.40 bitrate= 1.5kbits/s speed=1.33x 
frame= 49 fps= 16 q=-1.0 size= 1KiB time=00:00:03.92 bitrate= 1.3kbits/s speed=1.27x 
frame= 62 fps= 17 q=-1.0 size= 256KiB time=00:00:04.44 bitrate= 472.3kbits/s speed=1.23x 
frame= 75 fps= 18 q=-1.0 size= 256KiB time=00:00:04.96 bitrate= 422.8kbits/s speed= 1.2x 
frame= 88 fps= 19 q=-1.0 size= 256KiB time=00:00:05.48 bitrate= 382.7kbits/s speed=1.18x 
frame= 100 fps= 19 q=-1.0 size= 256KiB time=00:00:05.96 bitrate= 351.9kbits/s speed=1.16x 
frame= 113 fps= 20 q=-1.0 size= 768KiB time=00:00:06.48 bitrate= 970.9kbits/s speed=1.14x 
frame= 126 fps= 20 q=-1.0 size= 768KiB time=00:00:07.00 bitrate= 898.8kbits/s speed=1.13x 
frame= 139 fps= 21 q=-1.0 size= 768KiB time=00:00:07.52 bitrate= 836.6kbits/s speed=1.12x 
frame= 152 fps= 21 q=-1.0 size= 1280KiB time=00:00:08.04 bitrate=1304.2kbits/s speed=1.11x 
frame= 165 fps= 21 q=-1.0 size= 1280KiB time=00:00:08.56 bitrate=1225.0kbits/s speed=1.11x 
frame= 178 fps= 22 q=-1.0 size= 1280KiB time=00:00:09.08 bitrate=1154.8kbits/s speed= 1.1x 
frame= 191 fps= 22 q=-1.0 size= 1280KiB time=00:00:09.60 bitrate=1092.3kbits/s speed= 1.1x 
frame= 203 fps= 22 q=-1.0 size= 1792KiB time=00:00:10.08 bitrate=1456.4kbits/s speed=1.09x 
frame= 217 fps= 22 q=-1.0 size= 1792KiB time=00:00:10.64 bitrate=1379.7kbits/s speed=1.09x 


[q] command received. Exiting.

[out#0/matroska @ 000001e0329cad80] video:2377KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.100389%
frame= 230 fps= 22 q=-1.0 Lsize= 2380KiB time=00:00:11.16 bitrate=1746.9kbits/s speed=1.08x 
ect)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2 --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 59. 39.100 / 59. 39.100
 libavcodec 61. 19.101 / 61. 19.101
 libavformat 61. 7.100 / 61. 7.100
 libavdevice 61. 3.100 / 61. 3.100
 libavfilter 10. 4.100 / 10. 4.100
 libswscale 8. 3.100 / 8. 3.100
 libswresample 5. 3.100 / 5. 3.100
 libpostproc 58. 3.100 / 58. 3.100
Input #0, rtsp, from 'rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0&unicast=false':
 Metadata:
 title : Media Server
 Duration: N/A, bitrate: N/A
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, 25 tbr, 90k tbn
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
Output #0, matroska, to 'output.mkv':
 Metadata:
 title : Media Server
 encoder : Lavf61.7.100
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, q=2-31, 25 tbr, 1k tbn
Press [q] to stop, [?] for help
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=N/A bitrate=N/A speed=N/A 
[in#0/rtsp @ 0000014b1a80a580] Error during demuxing: Error number -138 occurred
[out#0/matroska @ 0000014b1a7ee700] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown
[out#0/matroska @ 0000014b1a7ee700] Output file is empty, nothing was encoded
frame= 0 fps=0.0 q=-1.0 Lsize= 1KiB time=N/A bitrate=N/A speed=N/A 


Unicast :


ffmpeg -fflags nobuffer -flags low_delay -timeout 10M -stats -i "rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0" -acodec copy -vcodec copy -y output.mkv

ffmpeg version 7.1.1-full_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
 built with gcc 14.2.0 (Rev1, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2 --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --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-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 59. 39.100 / 59. 39.100
 libavcodec 61. 19.101 / 61. 19.101
 libavformat 61. 7.100 / 61. 7.100
 libavdevice 61. 3.100 / 61. 3.100
 libavfilter 10. 4.100 / 10. 4.100
 libswscale 8. 3.100 / 8. 3.100
 libswresample 5. 3.100 / 5. 3.100
 libpostproc 58. 3.100 / 58. 3.100
Input #0, rtsp, from 'rtsp://user:password@10.10.10.10:554/cam/realmonitor?channel=1&subtype=0':
 Metadata:
 title : Media Server
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, 25 fps, 25 tbr, 90k tbn
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
Output #0, matroska, to 'output.mkv':
 Metadata:
 title : Media Server
 encoder : Lavf61.7.100
 Stream #0:0: Video: hevc (Main), yuv420p(tv), 2560x1440, q=2-31, 25 fps, 25 tbr, 1k tbn
Press [q] to stop, [?] for help
frame= 0 fps=0.0 q=-1.0 size= 0KiB time=00:00:01.32 bitrate= 0.0kbits/s speed= 2.6x 
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frame= 217 fps= 22 q=-1.0 size= 1792KiB time=00:00:10.64 bitrate=1379.7kbits/s speed=1.09x 


[q] command received. Exiting.

[out#0/matroska @ 000001e0329cad80] video:2377KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.100389%
frame= 230 fps= 22 q=-1.0 Lsize= 2380KiB time=00:00:11.16 bitrate=1746.9kbits/s speed=1.08x 


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