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• Cannot play amr rtp stream using ffmpeg

  1er juin 2020, par Vikram Dattu

  I want to receive and play amr packets streamed using RTP.

  



  Packets are sent to my macbook on port 9999

  



  I can receive packets using simple C program for UDP receiver.
I use bind to 9999 port and use recvfrom to receive packets.

  



  However when I use ffmpeg command to do the same, it is not able to receive single packet.

  



  Command used is : ffplay -protocol_whitelist file,udp,rtp -i test.sdp

  



  Contents of test.sdp :

  



  v=0
o=Andrew 2890844526 2890844526 IN IP4 192.168.1.106
s= SDP Blog
c=IN IP4 192.168.1.106
t=0 0
m=audio 9999 RTP/AVP 100
a=rtpmap:100 AMR/8000/1
a=fmtp:100 octet-align=1


  



  192.168.1.106 is sender's address.

  



  I have tried changing this address to 127.0.0.1. Doesn't help.

  



  I am stuck at the point and not cannot find anything helpful.

  



  By the way,
sample sine wav generator example to stream on same device (loopback on 127.0.0.1) works.

  


• FFmpeg/MP4 - Force all existing frames to play at fixed frame rate

  16 mai 2020, par MJoseph

  I have an MP4 video file that I suspect is corrupt, in that mediainfo reports a variable frame rate, but I believe the frames present are meant to be played at a fixed frame rate. This discrepancy causes video stuttering. Is there any way to force an MP4 container (by editing header info, or frame timing tables) to simply play back all existing frames at a fixed frame rate (i.e. 24fps). Every tip I've read assumes you want to drop and/or add frames to achieve a new frame rate, while keeping all the old frame timings (i.e. ffmpeg -r or ffmpeg -filter). These methods end up preserving the stutter and altering the size of the file. I would like to throw out the frame timings, but keep all frames, and just play them back at a constant rate. Is this possible ?

  


• My music doesn't play correctly and other problems - Discord.py

  24 mars 2021, par Diacono

  So, I'm triying to let my bot play songs directly from the url (without downloading them like the song.mp3 method) but I'm having a hard time. The bot plays only 1 song and when I try to play another song it doesn't play it.
I'm also getting 2 errors : video_link is not defined and self is not defined.
Also when I try to play live music like "lofi hip hop radio - beats to relax/study to" nothing happens.
Can you help me please ???

  


  This is my code

  


  import asyncio
import discord
from discord.ext import commands, tasks
import requests
import json
from random import choice
from discord.utils import get
from discord import FFmpegPCMAudio
import youtube_dl
bot = commands.Bot(command_prefix="!")



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:
            data = data['entries'][0]

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


@bot.command()
async def play(ctx, url):
    voice = await ctx.author.voice.channel.connect()
    player = await YTDLSource.from_url(url, loop=client.loop)
    ctx.voice_client.play(player, after=lambda e: print('Player error: %s' % e) if e else None)
    ydl_opts = {'format': 'bestaudio'}
    FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 'options': '-vn'}
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
         info = ydl.extract_info(video_link, download=False)
         URL = info['formats'][0]['url']
    voice = get(self.bot.voice_clients, guild=ctx.guild)
    voice.play(discord.FFmpegPCMAudio(URL, **FFMPEG_OPTIONS))