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• Can't record full screen using FFMEG Video File Writer - C#

  2 avril 2019, par nsds

  My app need to record entire screen as video. For that I have installed

  AForge.Video.FFMPEG

  and did like below. Now I can record the screen. But some bottom area and right end area of screen is missing. Can anyone suggest what causes the issue ? I want to record the entire screen.

  SystemInformation.VirtualScreen

  is used to calculate screen size. it is getting as 1536*864

    private ScreenCaptureStream _streamVideo;
  
    private VideoFileWriter _Screenwriter;
  
    private Rectangle _screenArea;
  
    private bool _isScreenRecording;
  
    private int _Screenwidth;
  
    private int _Screenheight;
  
    public RecordVideo()
  
      {
  
          InitializeComponent(); 
  
          this._Screenwriter = new VideoFileWriter();
  
          this._Screenwidth = SystemInformation.VirtualScreen.Width;
  
          this._Screenheight = SystemInformation.VirtualScreen.Height;
  
          this._isScreenRecording = false;
  
          this._screenArea = Rectangle.Empty;
  
        }
  
   private void btn_startRecord_Click(object sender, EventArgs e)
  
      {
  
          try
  
          {        
  
          if (btn_screenRecord.Text == "Record")
  
          {
  
              FolderBrowserDialog fbd = new FolderBrowserDialog();
  
              if (fbd.ShowDialog() == DialogResult.OK)
  
              {
  
                  _isScreenRecording = true;
  
                  this.StartRecScreen(fbd.SelectedPath);
  
              }
  
          }
  
          else
  
          {
  
              _isScreenRecording = false;
  
              btn_screenRecord.Text = "Record";
  
              MessageBox.Show(@"Recorded !");
  
          }
  
          }
  
          catch (Exception EX)
  
          { MessageBox.Show(EX.Message); }
  
      }
  
  
  
  private void StartRecScreen(string path)
  
      {
  
         btn_screenRecord.Text = "Stop";
  
         this.SetScreenArea();
  
        _isRecording = true;
  
         string fullName = string.Format(@"{0}\{1}_{2}.mp4", path, "Record_", DateTime.Now.ToString("d_MMM_yyyy_HH_mm_ssff"));
  
  
  
              // Save File option
  
              _Screenwriter.Open(
  
                  fullName,
  
                  this._Screenwidth,
  
                  this._Screenheight,
  
                  10, VideoCodec.MPEG4, 1000000);
  
              // create screen capture video source
  
              this._streamVideo = new ScreenCaptureStream(this._screenArea);
  
  
  
              // set NewFrame event handler
  
              this._streamVideo.NewFrame += new NewFrameEventHandler(this.video_NewScreenFrame);
  
  
  
              // start the video source
  
              this._streamVideo.Start();
  
  
  
      }
  
      private void video_NewScreenFrame(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          if (this._isScreenRecording)
  
          {              
  
              this._Screenwriter.WriteVideoFrame(eventArgs.Frame);             
  
          }
  
          else
  
          {             
  
              _streamVideo.SignalToStop();             
  
              _Screenwriter.Close();
  
          }
  
      }
  
  
  
      private void SetScreenArea()
  
      {
  
          // get entire desktop area size
  
          foreach (Screen screen in Screen.AllScreens)
  
          {
  
              this._screenArea = Rectangle.Union(_screenArea, screen.Bounds);
  
          }
  
      }

• Discord.py music bot doesn't play next song in queue

  10 mai 2019, par Lewis H

  This is my code for the bot I’m trying to create, it plays the music fine.

  ytdl_options = {
  
      'format': 'bestaudio/best',
  
      'restrictfilenames': True,
  
      'noplaylist': True,
  
      'nocheckcertificate': True,
  
      'quiet':True,
  
      'ignoreerrors': False,
  
      'logtostderr': False,
  
      'no_warnings': True,
  
      'default_search': 'auto',
  
      'source_address': '0.0.0.0' # using ipv4 since ipv6 addresses causes issues sometimes
  
      }
  
  
  
  
  
          # ffmpeg options
  
  ffmpeg_options= {
  
      'options': '-vn'
  
      }
  
  
  
  
  
  
  
  @bot.command()
  
  async def play(ctx, url:str = None): 
  
      queue = {} 
  
  
  
      channel = ctx.author.voice.channel    
  
      if ctx.voice_client is not None:  
  
          await ctx.voice_client.move_to(channel)
  
      elif ctx.author.voice and ctx.author.voice.channel:       
  
          await channel.connect()
  
  
  
      if not url:
  
          await ctx.send("Try adding a URL. e.g. !play https://youtube.com/watch?v=XXXXXXXXX")
  
  
  
      if ctx.voice_client is not None:
  
          vc = ctx.voice_client #vc = voice client, retrieving it
  
          ytdl = youtube_dl.YoutubeDL(ytdl_options)
  
  
  
  
  
          loop = asyncio.get_event_loop()
  
          data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url))
  
  
  
          if 'entries' in data:
  
              data = data['entries'][0] 
  
          svr_id = ctx.guild.id
  
          if svr_id in queue:
  
              queue[svr_id].append(data)
  
  
  
          else:
  
              queue[svr_id] = [data]
  
          await ctx.send(data.get('title') + " added to queue")
  
  
  
          source = ytdl.prepare_filename(queue[svr_id][0])
  
          def pop_queue():
  
              if queue[svr_id] != []:
  
                  queue[svr_id].pop(0)
  
                  data = queue[svr_id][0]
  
              else:
  
                  vc.stop()
  
  
  
          if not vc.is_playing():
  
              vc.play(discord.FFmpegPCMAudio(source, **ffmpeg_options), after=lambda: pop_queue())

  The next song downloads and queues it fine, but once the first song finishes, it doesn’t play the next one. I can’t figure out how to make it play after the first song has commenced. I have the after= set to remove the top item of the queue, but how do I get it to play again ? Thanks

• Format ffmpeg command to extract the full klv for an mpg/ts file

  24 décembre 2020, par Andrew Marquez

  I am extracting the KLV data from an mpg file using klvdata and ffmpeg.

  



  Following the readme, I have downloaded the sample "Day Flight.mpg" video file that contains KLV data. Running the quick start command works (I get the exact same result as the readme example for the first 6 frames.)

  



  However, for the life of me I don't know how I can extract the KLV data for the entire video file.

  



  As an experiment, I tried creating the KLV data file from an offset start :

  



  ffmpeg -ss 5 -i Day\ Flight.mpg -map data-re -codec copy -f data - > out.klv


  



  and when I run it through my code with different start times (5, 25, etc.) I do get different results.

  



  This (to me) would suggest that the mpg file does contain KLV data throughout, but I can only access 6 frames at a time.

  



  I would expect to be able to run an ffmpeg command to output the full KLV data. I need help formatting my ffmpeg command to properly provide all the data.

  



  To replicate, download the "Day Flight.mpg" file from the klvdata project page and run the command I posted above. You will note it is less than a page long. It should be many, many pages long. Thank you for your help !