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• How do I resolve ffmpeg concat command error "unknown keyword..." ?

  6 décembre 2023, par Scorb

  I am trying to concatenate two video files using ffmpeg, and I am receiving an error.

  


  To eliminate compatibility issues between the two videos, I have been concatenating the same video with itself, and the same error persists.

  


  ffmpeg \
  -f concat \
  -safe 0 \
  -i intro_prepped.avi intro_prepped.avi \
  -c copy \
  concat.avi  


  


  And the error output I receive is....

  


  


  [concat @ 0x220d420] Line 1 : unknown keyword 'RIFFf� ?'
intro_prepped.avi : Invalid data found when processing input

  


  


  I have tried various combinations of concat flags and have not been able to get it to work. Has anyone seen this error before ?

  


• avformat_write_header error() error -22 : Could not write header to '' "

  11 septembre 2023, par Saurabh Sharma

  I am trying to extract audio from video byte array file using ffmpeg library and store the output in another byte array.
Here is my implementation :

  


    private byte[] extractAudioFromVideo(byte[] videoBytes) {

        try {
            FFmpegLogCallback.set();
            ByteArrayInputStream videoData = new ByteArrayInputStream(videoBytes);

            ByteArrayOutputStream audioData = new ByteArrayOutputStream();

            FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(videoData);
            grabber.start();
      
            FrameRecorder recorder = new FFmpegFrameRecorder(audioData, grabber.getAudioChannels());
            recorder.setFormat("wav");
            recorder.setAudioCodec(avcodec.AV_CODEC_ID_ADPCM_IMA_WAV);
            recorder.setAudioBitrate(grabber.getAudioBitrate());
            recorder.setAudioChannels(grabber.getAudioChannels());
            recorder.setAudioQuality(0);
            recorder.start();


            // Grab and record audio frames
            Frame audioFrame;
            while ((audioFrame = grabber.grabSamples()) != null) {
                recorder.record(audioFrame);
            }

       
            grabber.stop();
            recorder.stop();
            
            return audioData.toByteArray();
        } catch (FFmpegFrameGrabber.Exception | FrameRecorder.Exception e) {
            e.printStackTrace();
        }


  


  On running the above code, I am running into the error

  


  org.bytedeco.javacv.FrameRecorder$Exception: avformat_write_header error() error -22: Could not write header to ''
    at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:900)
    at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:406)


  


  On adding FFmpegLogCallback.set() in the above code for detailed logs it says
Error : [wav @ 0x7f9910eb4780] No streams to mux were specified

  


  Info: Input #0, matroska,webm, from 'java.io.ByteArrayInputStream@36d592ba':

Info:   Metadata:

Info:     encoder         : 
Info: Chrome
Info: 

Info:   Duration: 
Info: N/A
Info: , start: 
Info: 0.000000
Info: , bitrate: 
Info: N/A
Info: 

Info:     Stream #0:0
Info: (eng)
Info: : Audio: opus, 48000 Hz, mono, fltp
Info:  (default)
Info: 

Info:     Stream #0:1
Info: (eng)
Info: : Video: h264 (Constrained Baseline), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9]
Info: , 
Info: 30.30 fps, 
Info: 30 tbr, 
Info: 1k tbn, 
Info: 60 tbc
Info:  (default)
Info: 

Error: [wav @ 0x7f9910eb4780] No streams to mux were specified


  


  Can someone please suggest how to resolve it

  


  Thanks

  


• 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'