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• Discord.py - IndexError : list index out of range

  23 novembre 2020, par itsnexn

  Hello i start to learn python and i make bot for practie but i got this error

  


  Ignoring exception in command play:
Traceback (most recent call last):
  File "C:\Users\sinad\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "d:\Projects\discord\musicbot.py", line 147, in play
    player = await YTDLSource.from_url(queue[0], loop=client.loop)
IndexError: list index out of range


  


  and i use ffmpeg to convert audio
and i write this bot in youtube and discord.py documentation
itswork well without music commend but if i use that i got error and isnt working idk why ...
this is my first python project so this is happening and its normal
and this is my code :

  


  import discord
from discord.ext import commands, tasks
from discord.voice_client import VoiceClient

import youtube_dl

from random import choice

from youtube_dl.utils import lowercase_escape

youtube_dl.utils.bug_reports_message = lambda: ''

ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': False,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0' # bind to ipv4 since ipv6 addresses cause issues sometimes
}

ffmpeg_options = {
    'options': '-vn'
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)

class YTDLSource(discord.PCMVolumeTransformer):
    def __init__(self, source, *, data, volume=0.5):
        super().__init__(source, volume)

        self.data = data

        self.title = data.get('title')
        self.url = data.get('url')

    @classmethod
    async def from_url(cls, url, *, loop=None, stream=False):
        loop = loop or asyncio.get_event_loop()
        data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))

        if 'entries' in data:
            # take first item from a playlist
            data = data['entries'][0]

        filename = data['url'] if stream else ytdl.prepare_filename(data)
        return cls(discord.FFmpegPCMAudio(filename, **ffmpeg_options), data=data)


client = commands.Bot(command_prefix='.')

status = ['']
queue = []

#print on terminal when is bot ready
@client.event
async def on_ready():
    change_status.start()
    print('Bot is online!')

#Welcome message
@client.event
async def on_member_join(member):
    channel = discord.utils.get(member.guild.channels, name='general')
    await channel.send(f'Welcome {member.mention}!  Ready to jam out? See `.help` command for details!')

#ping
@client.command(name='ping', help='This command returns the latency')
async def ping(ctx):
    await ctx.send(f'**Ping!** Latency: {round(client.latency * 1000)}ms')

@client.event
async def on_message(message):

    if message.content in ['hello', 'Hello']:
        await message.channel.send("**wasaaaaaap**")

    await client.process_commands(message)


#join
@client.command(name='join', help='This command makes the bot join the voice channel')
async def join(ctx):
    if not ctx.message.author.voice:
        await ctx.send("You are not connected to a voice channel")
        return

    else:
        channel = ctx.message.author.voice.channel

    await channel.connect()

#queue
@client.command(name='queue', help='This command adds a song to the queue')
async def queue_(ctx, url):
    global queue

    queue.append(url)
    await ctx.send(f'`{url}` added to queue!')

#remove
@client.command(name='remove', help='This command removes an item from the list')
async def remove(ctx, number):
    global queue

    try:
        del(queue[int(number)])
        await ctx.send(f'Your queue is now `{queue}!`')

    except:
        await ctx.send('Your queue is either **empty** or the index is **out of range**')

#play
@client.command(name='play', help='This command plays songs')
async def play(ctx):
    global queue

    server = ctx.message.guild
    voice_channel = server.voice_client

    async with ctx.typing():
        player = await YTDLSource.from_url(queue[0], loop=client.loop)
        voice_channel.play(player, after=lambda e: print('Player error: %s' % e) if e else None)

    await ctx.send('**Now playing:** {}'.format(player.title))
    del(queue[0])

#pause
@client.command(name='pause', help='This command pauses the song')
async def pause(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.pause()

#resune
@client.command(name='resume', help='This command resumes the song!')
async def resume(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.resume()

#viow
@client.command(name='view', help='This command shows the queue')
async def view(ctx):
    await ctx.send(f'Your queue is now `{queue}!`')

#leave
@client.command(name='leave', help='This command stops makes the bot leave the voice channel')
async def leave(ctx):
    voice_client = ctx.message.guild.voice_client
    await voice_client.disconnect()

#stop
@client.command(name='stop', help='This command stops the song!')
async def stop(ctx):
    server = ctx.message.guild
    voice_channel = server.voice_client

    voice_channel.stop()

@tasks.loop(seconds=20)
async def change_status():
    await client.change_presence(activity=discord.Game(choice(status)))

client.run("my_secret")


  


• process video stream from memory buffer

  9 août 2020, par Dan

  I need to parse a video stream (mpeg ts) from proprietary network protocol (which I already know how to do) and then I would like to use OpenCV to process the video stream into frames. I know how to use cv::VideoCapture from a file or from a standard URL, but I would like to setup OpenCV to read from a buffer(s) in memory where I can store the video stream data until it is needed. Is there a way to setup a call back method (or any other interfrace) so that I can still use the cv::VideoCapture object ? Is there a better way to accomplish processing the video with out writing it out to a file and then re-reading it. I would also entertain using FFMPEG directly if that is a better choice. I think I can convert AVFrames to Mat if needed.

  


• Ffmpeg- Split video into 30 seconds parts in android

  22 novembre 2019, par Corgi Mogi

  I am working on a project. In which I want to split the video into 30 sec equal parts. If the video is 45 sec long than ideally in 30 and 15-sec parts. I already created a method which takes the starting and the ending point and run the Ffmpeg command to cut the video. This is what I created so far

     private void executeCutVideoCommand(int startMs, int endMs) {
  
          File moviesDir = Environment.getExternalStoragePublicDirectory(
  
                  Environment.DIRECTORY_MOVIES
  
          );
  
  
  
          String filePrefix = "cut_video";
  
          String fileExtn = ".mp4";
  
          String yourRealPath = getPath(VideoCutterActivity.this, selectedVideoUri);
  
          File dest = new File(moviesDir, filePrefix + fileExtn);
  
          int fileNo = 0;
  
          while (dest.exists()) {
  
              fileNo++;
  
              dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
  
          }
  
  
  
          filePath = dest.getAbsolutePath();
  
          String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};
  
  
  
          execFFmpegBinary(complexCommand);
  
          MediaScannerConnection.scanFile(VideoCutterActivity.this,
  
                  new String[] { filePath },
  
                  null,
  
                  new MediaScannerConnection.OnScanCompletedListener() {
  
  
  
                      public void onScanCompleted(String path, Uri uri) {
  
  
  
                          Log.i("ExternalStorage", "Scanned " + path + ":");
  
                          Log.i("ExternalStorage", "-> uri=" + uri);
  
                      }
  
                  });
  
  
  
  
  
      }
  
  
  
      /**
  
       * Executing ffmpeg binary
  
       */
  
      private void execFFmpegBinary(final String[] command) {
  
          try {
  
              ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
                  @Override
  
                  public void onFailure(String s) {
  
                      Log.d(TAG, "FAILED with output : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess(String s) {
  
                      Log.d(TAG, "SUCCESS with output : " + s);
  
                          Intent intent = new Intent(VideoCutterActivity.this, PreviewActivity.class);
  
                          intent.putExtra(FILEPATH, filePath);
  
                          startActivity(intent);
  
                  }
  
  
  
                  @Override
  
                  public void onProgress(String s) {
  
                      progressDialog.setMessage("progress : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onStart() {
  
                      progressDialog.setMessage("Processing...");
  
                      progressDialog.show();
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
                      progressDialog.dismiss();
  
  
  
  
  
                  }
  
              });
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              // do nothing for now
  
          }
  
      }

  i tried to add a loop in method Calling But than app crashes

      cutVideo.setOnClickListener(new View.OnClickListener() {
  
              @Override
  
              public void onClick(View v) {
  
  
  
                  choice = 2;
  
  
  
                  if (selectedVideoUri != null) {
  
                      int start,end;
  
                      for (int i=0;i<=duration;i=i+30){
  
                          start=i;
  
                          end=start+30;
  
                          executeCutVideoCommand(start,end);
  
  
  
                      }
  
  //                    executeCutVideoCommand(rangeSeekBar.getSelectedMinValue().intValue() * 1000, rangeSeekBar.getSelectedMaxValue().intValue() * 1000);
  
  
  
                  } else
  
                      Snackbar.make(mainlayout, "Please upload a video", 4000).show();
  
              }
  
          });
  
  
  
  
  
      }

  I hope now you can what i want to do. I want to Ffmpeg command or method which split the video into 30-sec parts and place them on the given filepath. Let me know if we you wanna know more about the code. Help is much appreciated