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• How to convert a script from youtube-dl

  16 janvier 2020, par danilshik

  There is a bash/batch file script :

  ffmpeg -i `youtube-dl https://www.twitch.tv/zero` -vf fps=fps=60, scale=1920x1080 -c:v libx264 -b:v 500k -preset superfast -c:a copy -f segment -segment_time 60 test.mp4

  The script is not mine, but it allows you to record video with a constant frame rate of parts. Unfortunately in cmd it does not work for me. Already tried everything, I do not know what the error is.

  I am getting No such file or directory.

  Tried 'youtube-dl https://www.twitch.tv/zero', the same error

  I tried "youtube-dl https://www.twitch.tv/zero", error : youtube-dl https://www.twitch.tv/zero: Invalid argument

  What am I doing wrong ? The author assures that he works on linux

  Update

  I tried ffmpeg -i $ (youtube-dl -f best -g https://www.twitch.tv/zero) .... The same error

  Update 2

  Why the video size exceeds 500 Mb ? What am I doing wrong ?

  
  

  Code

  cls && @echo off & setlocal enableextensions enabledelayedexpansion 
  
  set "_tag_00=https://www.twitch.tv/avagg"
  
  set "_tag_01=--ignore-errors --abort-on-error --ignore-config --flat-playlist --geo-bypass "
  
  set "_tag_02=--restrict-filenames --no-part --no-cache-dir --write-thumbnail --prefer-ffmpeg "
  
  set "_tag_03=--ffmpeg-location .\ --postprocessor-args  -i "%%(title)s.%%(ext)s" -vf fps^=fps^=60^,"
  
  set "_tag_04=scale^=1920x1080 -c:v libx264 -b:v 500k -preset superfast -c:a copy -f segment -segment_time "
  
  set "_tag_05=60 %%^(title^)s.mp4"
  
  
  
  youtube-dl "!_tag_00!" -f "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best" -o "%%^(title^)s.%%^(ext^)s" !_tag_1!!_tag_2!!_tag_3!!_tag_4!!_tag_5!
  
  Pause

  Update 3

  

• Python Youtube ffmpeg Session Has Been Invalidated

  14 août 2020, par Daniel

  I get the following error while I'm playing YouTube audio with my bot

  



  [tls @ 0000024ef8c4d480] Error in the pull function.
[matroska,webm @ 0000024ef8c4a400] Read error
[tls @ 0000024ef8c4d480] The specified session has been invalidated for some reason.
    Last message repeated 1 times


  



  It seems like YouTube links expire ? I don't really know but I need to fix this issue. This is my code :

  



      class YTDLSource(discord.PCMVolumeTransformer):

        def __init__(self, source, *, data, requester):
            super().__init__(source)
            self.requester = requester

            self.title = data['title']
            self.description = data['description']
            self.uploader = data['uploader']
            self.duration = data['duration']
            self.web_url = data['webpage_url']
            self.thumbnail = data['thumbnail']

        def __getitem__(self, item: str):
            return self.__getattribute__(item)

        @classmethod
        async def create_source(cls, ctx, player, search: str, *, loop, download=True):
            async with ctx.typing():
                loop = loop or asyncio.get_event_loop()
                to_run = partial(ytdl.extract_info, url=search, download=download)
                raw_data = await loop.run_in_executor(None, to_run)

                if 'entries' in raw_data:
                    # take first item from a playlist
                    if len(raw_data['entries']) == 1:
                        data = raw_data['entries'][0]
                    else:
                        data = raw_data['entries']
                        #loops entries to grab each video_url
                        total_duration = 0
                        try:
                            for i in data:
                                webpage = i['webpage_url']
                                title = i['title']
                                description = i['description']
                                uploader = i['uploader']
                                duration = i['duration']
                                thumbnail = i['thumbnail']
                                total_duration += duration

                                if download:
                                    source = ytdl.prepare_filename(i)
                                    source = cls(discord.FFmpegPCMAudio(source), data=i, requester=ctx.author)
                                else:
                                    source = {'webpage_url': webpage, 'requester': ctx.author, 'title': title, 'uploader': uploader, 'description': description, 'duration': duration, 'thumbnail': thumbnail}

                                player.queue.append(source)

                        except Exception as e:
                            print(e)
                            return

                        embed=discord.Embed(title="Playlist", description="Queued", color=0x30a4fb, timestamp=datetime.now(timezone.utc))
                        embed.set_author(name=ctx.author.display_name, icon_url=ctx.author.avatar_url)
                        embed.set_thumbnail(url=data[0]['thumbnail'])
                        embed.add_field(name=raw_data['title'], value=f"{len(data)} videos queued.", inline=True)
                        embed.set_footer(text=raw_data["uploader"] + ' - ' + '{0[0]}m {0[1]}s'.format(divmod(total_duration, 60)))
                        await ctx.send(embed=embed)
                        return

                embed=discord.Embed(title="Playlist", description="Queued", color=0x30a4fb, timestamp=datetime.now(timezone.utc))
                embed.set_author(name=ctx.author.display_name, icon_url=ctx.author.avatar_url)
                embed.set_thumbnail(url=data['thumbnail'])
                embed.add_field(name=data['title'], value=(data["description"][:72] + (data["description"][72:] and '...')), inline=True)
                embed.set_footer(text=data["uploader"] + ' - ' + '{0[0]}m {0[1]}s'.format(divmod(data["duration"], 60)))
                await ctx.send(embed=embed)

                if download:
                    source = ytdl.prepare_filename(data)
                else:
                    source = {'webpage_url': data['webpage_url'], 'requester': ctx.author, 'title': data['title'], 'uploader': data['uploader'], 'description': data['description'], 'duration': data['duration'], 'thumbnail': data['thumbnail']}
                    player.queue.append(source)
                    return

                source = cls(discord.FFmpegPCMAudio(source), data=data, requester=ctx.author)
                player.queue.append(source)


        @classmethod
        async def regather_stream(cls, data, *, loop):
            loop = loop or asyncio.get_event_loop()
            requester = data['requester']

            to_run = partial(ytdl.extract_info, url=data['webpage_url'], download=True)
            data = await loop.run_in_executor(None, to_run)

            return(cls(discord.FFmpegPCMAudio(data['url']), data=data, requester=requester))


  



  I'm using the rewrite branch of discord.py for the bot.
I'm not sure if I need to provide more details ? Please let me know, I really need to get this fixed...

  


• How to stream H.264 bitstream to browser

  21 janvier 2019, par BobtheMagicMoose

  This is a followup to https://raspberrypi.stackexchange.com/questions/93254/stream-usb-webcam-with-audio?noredirect=1#comment150507_93254

  I, like many other brave tinkerers before me, thought it would be a simple task to take an old USB camera (c920) can pair it with a raspberry pi to make a network streaming device (e.g., baby monitor). As those that have gone before me, I have now realized (after two days of tearing my hair out), that this is an extremely complicated task.

  Problem statement : I have a raspberry pi zero and a c920 webcam. I want to use the H.264 bitstream from the webcam and serve it on the pi without transcoding it (the feeble processor would really struggle). I want to combine the video stream with its audio and send it over to a browser (phone, tablet, pc - something HTML5 without NAPI).

  My current strategy is to do the following :

  ffmpeg -re -f s16le -i /dev/zero -f v4l2 -thread_queue_size 512 -codec:v h264 -s 1920x1080 -i /dev/video0 -codec:v copy -acodec aac -ab 128k -g 50 http://localhost:8090/camera.ffm (this is with dummy audio - I figured I would add audio later)

  Followed by sudo ffserver -d -f /etc/ffserver.conf to received the feed and broadcast it as a stream. This is the ffserver.conf file :

  `HTTPPort 8090
  
  HTTPBindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 100000
  
  CustomLog -
  
  <feed>
  
    File /tmp/streamwebm.ffm
  
    FileMaxSize 50M
  
    ACL allow localhost
  
    ACL allow 128.199.149.46
  
    #ACL allow 127.0.0.1
  
    ACL allow 192.168.0.0 192.168.0.255
  
  </feed>
  
  <stream stream="stream">
  
  Format webm
  
  
  
  # Video Settings
  
  VideoFrameRate 30
  
  VideoSize 1920x1080
  
  
  
  # Audio settings
  
  AudioCodec libvorbis
  
  AudioSampleRate 48000
  
  AVOptionAudio flags +global_header
  
  
  
  MaxTime 0
  
  AVOptionVideo me_range 16
  
  AVOptionVideo qdiff 4
  
  AVOptionVideo qmin 4
  
  AVOptionVideo qmax 40
  
  #AVOptionVideo good
  
  AVOptionVideo flags +global_header
  
  
  
  # Streaming settings
  
  PreRoll 10
  
  StartSendOnKey
  
  
  
  Metadata author "author"
  
  Metadata copyright "copyright"
  
  Metadata title "Web app name"
  
  Metadata comment "comment"
  
  </stream>

  My basic html is<video>  <source src="http://localhost:8090/stream"> </source></video>

  The stream however, doesn’t work (the browser won’t connect) and I get the following :
  

  And the browser on the client says (failed) NET::ERR_CONNECTION_REFUSED

  Thoughts :
   Begin stream simple mp4 with ffserver explains that ffserver can’t stream .mp4 because of headers or something. This is why I am using webm (which doesn’t support h.264 I believe and is causing the really slow performance converting to vp9). I’m not concerned about CPU usage at the moment, just want to get an image to appear on the browser !

  • I hear one issue deals with ’chunking’ - that the camera h.264 is a bitstream but h.264 streams for html5 should be chunked. Not sure how that would work.

  • I have tried VLC for some things (RTP) but haven’t have success.

  • Most resources (SE and other sites) are from 2010-2015 and it seems as thought v4l2 and other things have developed since then.

  • As my problem is most likely general ignorance of the subject matter, I would appreciate any answers that provide some general understanding as to the theory behind different techniques. I know this makes the question more of a call for opinion and less appropriate for SE, but I’m fixing to throw my computer out the window (you know the feeling).

  Thank you !