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• Why does my linux ffmpeg output file require running it back through ffmpeg to play on windows

  13 septembre 2020, par Sean Miller

  I am using the following to screen capture a Raspberry Pi display :

  


  /usr/bin/ffmpeg -v quiet -f lavfi -i anullsrc -f x11grab -framerate 30 -video_size 720x480 -i :0.0 -f flv -b:v 1M /home/pi/usbdrv/myfile.avi"


  


  I stop screen capturing by hitting the letter q and ffmpeg exits without error.

  


  I can play it back with mplayer in Linux.

  


  However, when I try to play it back on Windows with the old media player or its newer movie player, they reports it is corrupted. I tried mp4 and mkv fromats as well.

  


  If I run it back through ffmpeg to encode it to a new file, it will play.

  


  Any thoughts why Windows will not play it without running it back through ffmpeg again ?

  


  Thanks,
Sean

  


• Play ogg file using ffplay / ffmpeg on .NET

  12 juillet 2021, par Rchrd

  I'm trying to play an Ogg file in VB.NET using ffplay.exe but I don't know exactly how.
This is my code :

  


  Private Sub ButtonIR_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonIR.Click
    If IsNotNothing(TextBoxSource.text) Then
        TextBoxDETALLES.Clear()
        Try
            Dim CONVERSOR As New Process

            CONVERSOR.StartInfo.FileName = "C:\ffplay.exe"
            CONVERSOR.StartInfo.Arguments = TextBoxSource.Text 
            CONVERSOR.StartInfo.UseShellExecute = False 
            CONVERSOR.StartInfo.RedirectStandardOutput = True 
            CONVERSOR.StartInfo.RedirectStandardError = True 
            CONVERSOR.StartInfo.CreateNoWindow = True 

            CONVERSOR.Start() 

            While Not CONVERSOR.StandardError.EndOfStream
                TextBoxDETALLES.AppendText(CONVERSOR.StandardError.ReadLine & vbCrLf) 

                Application.DoEvents()
            End While

            MsgBox("HECHO") 
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    Else
        MsgBox("Error")
    End If
End Sub


  


  I'm not trying to convert it, I'm trying to play it.

  


• 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