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• Keep getting "discord.ext.commands.errors.CommandInvokeError : Command raised an exception : KeyError : 'source'" error

  22 février 2023, par kris

  Everytime I try to run play command in my bot, I get this error in the terminal, kind of new to coding so not exactly sure whats going on. It was working just fine, then it started not to work.

  


  import discord

from discord.ext import commands

from youtube_dl import YoutubeDL

class music_cog(commands.Cog):
    def __init__(self, bot):
        self.bot = bot
        
        self.is_playing = False
        self.is_paused = False

        self.music_queue = []
        self.YDL_OPTIONS = {'format': 'bestaudio', 'noplaylist': 'True'}
        self.FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 'options': '-vn'}

        self.vc = None

    def search_yt(self, item):
        with YoutubeDL(self.YDL_OPTIONS) as ydl:
            try:
                info = ydl.extract_info("ytsearch:%s" % item, download=False)['entries'][0]
            except Exception:
                return False
        return {'sourcffmpege': info['formats'][0]['url'], 'title': info['title']}
    
    def play_next(self):
        if len(self.music_queue) > 0:
            self.is_playing = True

            m_url = self.music_queue[0][0]['source']

            self.music_queue.pop(0)

            self.vc.play(discord.FFmpegPCMAudio(executable="ffmpeg", source=m_url, **self.FFMPEG_OPTIONS), after=lambda e: self.play_next())
        else:
            self.is_playing = False

    async def play_music(self, ctx):
        if len(self.music_queue) > 0:
            self.is_playing = True

            m_url=self.music_queue[0][0]['source']

            if self.vc == None or not self.vc.is_connected():
                self.vc = await self.music_queue[0][1].connect()

                if self.vc == None:
                    await ctx.send("Could not connect to the voice channel")
                    return
            else:
                await self.vc.move_to(self.music_queue[0][1])

            self.music_queue.pop(0)

            self.vc.play(discord.FFmpegPCMAudio(executable="ffmpeg", source=m_url, **self.FFMPEG_OPTIONS), after=lambda e: self.play_next())

    @commands.command(name="play", aliases=["p", "playing"], help="Play the selected song from youtube")
    async def play(self, ctx, *args):
        query = " ".join(args)

        voice_channel = ctx.author.voice.channel
        if voice_channel is None:
            await ctx.send("Connect to a voice channel!")
        elif self.is_paused:
            self.vc.resume()
        else:
            song = self.search_yt(query)
            if type(song) == type(True):
                await ctx.send("Could not download the song. Incorrect format, try a different keyword")
            else:
                await ctx.send("Song added to the queue")
                self.music_queue.append([song, voice_channel])

                if self.is_playing == False:
                    await self.play_music(ctx)

    @commands.command(name="pause", help="Pauses the current song being played")
    async def pause(self, ctx, *args):
        if self.is_playing:
            self.is_playing = False
            self.is_paused = True
            self.vc.pause()
        elif self.is_paused:
            self.vc.resume()

    @commands.command(name="resume", aliases=["r"], help="Resumes playing the current song")
    async def resume(self, ctx, *args):
        if self.is_paused:
            self.is_playing = True
            self.is_paused = False
            self.vc.resume()

    @commands.command(name="skip", aliases=["s"], help="Skips the currently played song")
    async def skip(self, ctx, *args):
        if self.vc != None and self.vc:
            self.vc.stop()
            await self.play_music(ctx)

    @commands.command(name="queue", aliases=["q"], help="Displays all the songs currently in the queue")
    async def queue(self, ctx):
        retval = ""

        for i in range(0, len(self.music_queue)):
            if i > 5: break
            retval += self.music_queue[i][0]['title'] + '\n'

        if retval != "":
            await ctx.send(retval)
        else:
            await ctx.send("No music in queue.")
    
    @commands.command(name="clear", aliases=["c", "bin"], help="Stops the current song and clears the queue")
    async def clear(self, ctx, *args):
        if self.vc != None and self.is_playing:
            self.vc.stop()
        self.music_queue = []
        await ctx.send("Music queue cleared")

    @commands.command(name="leave", aliases=["l"], help="Kicks the bot from the voice channel")
    async def leave(self, ctx):
        self.is_playing = False
        self.is_paused = False
        await self.vc.disconnect()

async def setup(bot):
    await bot.add_cog(music_cog(bot))


  


  this is my music_cogs.py, this is where error is coming from

  


  was working just fine then it started to give me this error after a while.

  


  raceback (most recent call last):
  File "C:\Users\poopt\AppData\Local\Programs\Python\Python38\lib\site-packages\discord\ext\commands\core.py", line 229, in wrapped
    ret = await coro(*args, **kwargs)
  File "c:\Users\poopt\Code\cool_bot\cogs\music_cog.py", line 77, in play
    await self.play_music(ctx)
  File "c:\Users\poopt\Code\cool_bot\cogs\music_cog.py", line 44, in play_music
    m_url=self.music_queue[0][0]['source']
KeyError: 'source'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
 line 1349, in invoke
    await ctx.command.invoke(ctx)
  File "C:\Users\poopt\AppData\Local\Programs\Python\Python38\lib\site-packages\discord\ext\commands\core.py", line 1023, in invoke
    await injected(*ctx.args, **ctx.kwargs)  # type: ignore
  File "C:\Users\poopt\AppData\Local\Programs\Python\Python38\lib\site-packages\discord\ext\commands\core.py", line 238, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: KeyError: 'source'


  


• What is the best way to get duration of a video using ffprobe (ffmpeg) ?

  15 juin 2023, par promaxdev

  Most of the solutions to get duration revolves around parsing the output to get the duration. Even FFProbe official documentation here says that there is no duration stored for MKV, webm, etc.

  


  Take the below examples.

  


  ffprobe -v error -i <inputmkv> -show_entries stream=...,duration,.. -of default=noprint_wrappers=1&#xA;</inputmkv>

  


  This gives me the below output. This is not having duration.

  


  

  


  But when I run the same command differently like below, I am getting this output but having duration. Just removed '-v error' part.

  


  ffprobe -i <inputmkv> -show_entries stream=...duration,... -of default=noprint_wrappers=1 &#xA;</inputmkv>

  


  

  


  If you notice the same command shows the duration in one place and not in another place.

  


  So my question is, What is the best way to get duration in ffmpeg, especially for the video streams ?

  


  Edit : I have already explored decoding using null mux option. But that is a costly operation and also need to parse the output.

  


• Variable in nested for loop not working correctly [duplicate]

  30 janvier 2023, par SeanMrnd

  The code below works pretty much as intended, but it works for only one video file at a time. All attempts at nesting it inside a for %%a in (\*.mp4) loop breaks it. The %duration% no longer outputs a value (or I'm doing something wrong), and as such, all of the arithmetic functions break.

  


  This code works (open to changes suggestions) :

  


  setlocal EnableExtensions EnableDelayedExpansion
IF EXIST output.gif DEL /F output.gif
IF EXIST test_preview.mp4 DEL /F test_preview.mp4
for /F "delims=" %%I in ('ffprobe.exe -v error -show_entries format^=duration -of default^=noprint_wrappers^=1:nokey^=1 test.mp4 2^>^&1') do (
    set "duration=%%I"
)
echo %duration%
set /a r=%duration%
set /a d1=r/10
set /a d2=r*2/10
set /a d3=r*3/10
set /a d4=r*4/10
set /a d5=r*5/10
set /a d6=r*6/10
set /a d7=r*7/10
set /a d8=r*8/10
set /a d9=r*9/10

ffmpeg -y -ss %d1% -i test.mp4 -c copy -t 1.5 "output/test_output1.mp4"
ffmpeg -y -ss %d2% -i test.mp4 -c copy -t 1.5 "output/test_output2.mp4"
ffmpeg -y -ss %d3% -i test.mp4 -c copy -t 1.5 "output/test_output3.mp4"
ffmpeg -y -ss %d4% -i test.mp4 -c copy -t 1.5 "output/test_output4.mp4"
ffmpeg -y -ss %d5% -i test.mp4 -c copy -t 1.5 "output/test_output5.mp4"
ffmpeg -y -ss %d6% -i test.mp4 -c copy -t 1.5 "output/test_output6.mp4"
ffmpeg -y -ss %d7% -i test.mp4 -c copy -t 1.5 "output/test_output7.mp4"
ffmpeg -y -ss %d8% -i test.mp4 -c copy -t 1.5 "output/test_output8.mp4"
ffmpeg -y -ss %d9% -i test.mp4 -c copy -t 1.5 "output/test_output9.mp4"
(
    echo file 'output/test_output1.mp4'
    echo file 'output/test_output2.mp4'
    echo file 'output/test_output3.mp4'
    echo file 'output/test_output4.mp4'
    echo file 'output/test_output5.mp4'
    echo file 'output/test_output6.mp4' 
    echo file 'output/test_output7.mp4'
    echo file 'output/test_output8.mp4'
    echo file 'output/test_output9.mp4'
)>list.txt

ffmpeg -safe 0 -f concat -i list.txt -c copy test_preview.mp4
ffmpeg -i test_preview.mp4 -vf scale=320:-1 output.gif
IF EXIST test_preview.mp4 DEL /F test_preview.mp4

pause


  


  This code does not, in an attempt to automate this for my whole library I replaced most file name references with %%~na

  


  setlocal EnableExtensions EnableDelayedExpansion
for %%a in (*.mp4) DO (
    IF EXIST %%~na.gif DEL /F %%~na.gif
    set /a y=10
    for /F "delims=" %%I in ('ffprobe.exe -v error -show_entries format^=duration -of default^=noprint_wrappers^=1:nokey^=1 %%~na.mp4 2^>^&1') do set "duration=%%I"
    echo %duration% %%I
    set /a r=%duration%
    set /a d1=r/10
    set /a d2=r*2/10
    set /a d3=r*3/10
    set /a d4=r*4/10
    set /a d5=r*5/10
    set /a d6=r*6/10
    set /a d7=r*7/10
    set /a d8=r*8/10d
    set /a d9=r*9/10

    ffmpeg -y -ss %d1% -i "%%~na.mp4" -c copy -t 1.5 "output/%%~na_output1.mp4"
    ffmpeg -y -ss %d2% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output2.mp4"
    ffmpeg -y -ss %d3% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output3.mp4"
    ffmpeg -y -ss %d4% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output4.mp4"
    ffmpeg -y -ss %d5% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output5.mp4"
    ffmpeg -y -ss %d6% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output6.mp4"
    ffmpeg -y -ss %d7% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output7.mp4"
    ffmpeg -y -ss %d8% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output8.mp4"
    ffmpeg -y -ss %d9% -i %%~na.mp4 -c copy -t 1.5 "output/%%~na_output9.mp4"
    (
        echo file 'output/%%~na_output1.mp4'
        echo file 'output/%%~na_output2.mp4'
        echo file 'output/%%~na_output3.mp4'
        echo file 'output/%%~na_output4.mp4'
        echo file 'output/%%~na_output5.mp4'
        echo file 'output/%%~na_output6.mp4' 
        echo file 'output/%%~na_output7.mp4'
        echo file 'output/%%~na_output8.mp4'
        echo file 'output/%%~na_output9.mp4'
    )>%%~na_list.txt
    ffmpeg -safe 0 -f concat -i %%~na_list.txt -c copy %%~na_preview.mp4
    ffmpeg -i %%~na_preview.mp4 -vf scale=320:-1 output.gif
    IF EXIST %%~na_preview.mp4 DEL /F %%~na_preview.mp4
)

pause