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• aarch64 : vvc : Fix compilation of alf.S with MSVC 2022 17.7 and older

  23 juillet 2024, par Martin Storsjö

  aarch64 : vvc : Fix compilation of alf.S with MSVC 2022 17.7 and older
  Use the "ldur" instruction explicitly, instead of having the
  
  assembler implicitly convert "ldr" instructions to "ldur".
  This fixes build errors like these :
  libavcodec\aarch64\vvc\alf.o.asm(1023) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q22, [x3, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1024) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q24, [x2, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1393) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q22, [x3, #24]
  
  libavcodec\aarch64\vvc\alf.o.asm(1394) : error A2518 : operand 2 : Memory offset must be aligned
  
          ldr             q24, [x2, #24]
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/aarch64/vvc/alf.S

• C# server problem with FFmpeg Visual Studio 2022

  16 mai 2024, par seanofdead

  Hello everyone I've spent countless hours on my server I'm trying to create that will share video from one stream to another client computer. That is the goal anyway. I'm using Visual Studio 2022 most recent update. Currently this is my code

  


  using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using FFmpeg.AutoGen;
using NLog;

public class VideoStreamServer
{
    private const int Port = 5000;
    private TcpListener server;
    private FFmpegVideoEncoder encoder;
    private static readonly Logger logger = LogManager.GetCurrentClassLogger();

    public VideoStreamServer()
    {
        // Initialize FFmpeg network components
        Console.WriteLine("Initializing FFmpeg network components...");
        int result = ffmpeg.avformat_network_init();
        if (result != 0)
        {
            throw new ApplicationException($"Failed to initialize FFmpeg network components: {result}");
        }

        // Initialize encoder
        encoder = new FFmpegVideoEncoder(1920, 1080, AVCodecID.AV_CODEC_ID_H264); // Screen size & codec
    }

    public static void Main()
    {
        // Initialize NLog
        var logger = LogManager.GetCurrentClassLogger();
        logger.Info("Application started");

        var server = new VideoStreamServer();
        server.Start().Wait();
    }

    public async Task Start()
    {
        server = new TcpListener(IPAddress.Any, Port);
        server.Start();
        logger.Info($"Server started on port {Port}...");

        try
        {
            while (true)
            {
                TcpClient client = await server.AcceptTcpClientAsync();
                logger.Info("Client connected...");
                _ = HandleClientAsync(client);
            }
        }
        catch (Exception ex)
        {
            logger.Error(ex, "An error occurred");
        }
    }

    private async Task HandleClientAsync(TcpClient client)
    {
        using (client)
        using (NetworkStream netStream = client.GetStream())
        {
            try
            {
                await encoder.StreamEncodedVideoAsync(netStream);
            }
            catch (IOException ex)
            {
                logger.Error(ex, $"Network error: {ex.Message}");
                // Additional logging and recovery actions
            }
            catch (Exception ex)
            {
                logger.Error(ex, $"Unexpected error: {ex.Message}");
                // Log and handle other exceptions
            }
            finally
            {
                // Ensure all resources are cleaned up properly
                client.Close();
                logger.Info("Client connection closed properly.");
            }
        }
    }
}

public class FFmpegVideoEncoder
{
    private readonly int width;
    private readonly int height;
    private readonly AVCodecID codecId;
    private static readonly Logger logger = LogManager.GetCurrentClassLogger();

    public FFmpegVideoEncoder(int width, int height, AVCodecID codecId)
    {
        this.width = width;
        this.height = height;
        this.codecId = codecId;
        InitializeEncoder();
    }

    private void InitializeEncoder()
    {
        // Initialize FFmpeg encoder here
        logger.Debug("FFmpeg encoder initialized");
    }

    public async Task StreamEncodedVideoAsync(NetworkStream netStream)
    {
        // Initialize reusable buffers for efficiency
        byte[] buffer = new byte[4096];

        // Capture and encode video frames
        while (true)
        {
            try
            {
                // Simulate capture and encoding
                byte[] videoData = new byte[1024]; // This would come from the encoder

                // Simulate streaming
                for (int i = 0; i < videoData.Length; i += buffer.Length)
                {
                    int chunkSize = Math.Min(buffer.Length, videoData.Length - i);
                    Buffer.BlockCopy(videoData, i, buffer, 0, chunkSize);
                    await netStream.WriteAsync(buffer, 0, chunkSize);
                }
            }
            catch (Exception ex)
            {
                logger.Error(ex, "Error streaming video data");
                throw; // Rethrow to handle in the calling function
            }

            await Task.Delay(1000 / 30); // For 30 FPS
        }
    }
}


  


  When I build no issues but when i run it in debug mode I get this error

  


  System.DllNotFoundException
  HResult=0x80131524
  Message=Unable to load DLL 'avformat.59 under C:\Users\phlfo\Downloads\cfolder\server\ConsoleApp\bin\Debug\': The specified module could not be found.
  Source=FFmpeg.AutoGen
  StackTrace:
   at FFmpeg.AutoGen.ffmpeg.LoadLibrary(String libraryName, Boolean throwException)
   at FFmpeg.AutoGen.ffmpeg.<>c.<.cctor>b__7_0(String libraryName)
   at FFmpeg.AutoGen.ffmpeg.<>c.<.cctor>b__7_242()
   at FFmpeg.AutoGen.ffmpeg.avformat_network_init()
   at VideoStreamServer..ctor() in C:\Users\phlfo\Downloads\cfolder\server\ConsoleApp\Program.cs:line 20
   at VideoStreamServer.Main() in C:\Users\phlfo\Downloads\cfolder\server\ConsoleApp\Program.cs:line 36


  


  I have FFmpeg.AutoGen package installed through VS i originally started with 7.0 but then switched to 5.0 to see if an older version might work (it did not). I also have the files in the same directory as the .exe for testing purposes as seen in the screenshot. Can someone please help me figure out this error.


  


• AttributeError while saving an animation using celluloid, Python 3.9

  26 juillet 2021, par rafael gf

  I'm trying to create a simple animation using the celluloid library, but I'm getting an attribute error when trying to save it. I'm not familiar with ffmpeg, but I read I should install it and point to its executable file for the saving to work, not sure what's going wrong. The massage I'm getting is :

  


  Exception has occurred: AttributeError&#xA;type object &#x27;FuncAnimation&#x27; has no attribute &#x27;_first_draw_id&#x27;&#xA; File "C:\Users\Fernando\Documents\Circulos\circulos.py", line 102, in <module>  anim.save(anim, filename="my_animation.gif", writer=FFwriter)&#xA;</module>

  


  I'll out the simplification version of the code below - I'm suppressing the part where I do some tucking with the circles, but I've done some testing plot by plot and it is working fine.

  


  import smtplib, os
import matplotlib.pyplot as plt
from matplotlib import animation
import math
from celluloid import Camera

plt.rcParams['animation.ffmpeg_path'] = os.getcwd() + '\\Circulos\\ffmpeg\\bin\\ffmpeg.exe'


#axes
figure, axes = plt.subplots()
axes.set_aspect(1)
axes.set_xlim((-xmax(C)),(xmax(C)))
axes.set_ylim((-ymax(C)),(ymax(C)))

b = 0

#add initial circles
for a in range 5:
    draw_circle = plt.Circle((a, a), 2, fc = 'None', ec = 'r')
    axes.add_artist(draw_circle)


#create figure and camera
figure, axes = plt.subplots()
axes.set_aspect(1)
axes.set_xlim((-xmax(C)),(xmax(C)))
axes.set_ylim((-ymax(C)),(ymax(C)))
camera = Camera(figure) 

Frame_time = 10

for b in range(Frame_time):

     #add circles
     for a in range 5:
        draw_circle = plt.Circle((a, a), 2, fc = 'None', ec = 'r')
        axes.add_artist(draw_circle)

    #Frame Picture
    camera.snap()


#create animation
anim = camera.animate()
anim = animation.FuncAnimation
FFwriter = animation.FFMpegWriter()
anim.save(anim, filename="my_animation.gif", writer=FFwriter)


  


  I'm working on VS code, the latest version I just updated it, and python 3.9