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• How would I go about packaging an mp3 file into an mp4 container ?

  22 novembre 2020, par Jacob

  So here's the issue that I'm currently having. I need an audio player for iOS that will play mp3. Now at first glance this may seem like a trivial issue, just create an audio tag and give it the URL to the mp3 file. While this technically works, it's basically unusable since iOS needs to download the entire file before starting to play it. This results in a really long wait time when trying to play large mp3 files (could get close to a minute).
So the first thing I tried was to manually mimic the chunking that chrome does for playing mp3 files. I first sent a HEAD request to get the byte length of the audio file. Used that length / duration in seconds to get the average bytes per second and use that data to request chunks based on where the user seeks to. That didn't work since sometimes mp3 files contain metadata that throw off the calculation (like a cover image). Additionally, sometimes mp3 files use VBR (Variable Bit Rate) and then I'm well and truly screwed.

  



  So this lead me to thinking, Safari couldn't possibly require the end user to download an entire mp4 file before playing it. So I took an mp3 file, converted it to mp4 on an online converter and tested my theory out. Voila, it worked. Safari was streaming the mp4 file in chunks and the wait time went to close to 0. Alright, so now all I need to do is convert mp3 files to mp4 files. The problem now is, I have requirement not to use my server for converting these files. I want to offload this expensive operation to the client. After looking around for a bit I found a few wasm libraries to do this, great ! Nope. These wasm libraries are huge (24 MB) and would add an unacceptable amount to my already large bundles files. So this brings me to my question. Is there any way to "trick" safari into thinking that my mp3 file is mp4. What I've tried already :

  



  On input change event -> get the file -> clone it into a new Blob with a mimeType of video/mp4 and then upload that file to the server. Chrome plays this file no problem (probably because it detects it's an mp3 file), on Safari however it's unable to play the file.

  



  So my question is, is there any way to package the mp3 file in an mp4 container (Client Side !important) to "force" Safari into chunking the file.

  


• ERROR:Output file #0 does not contain any stream (ffmpeg)

  27 décembre 2023, par Ali Asgher Badshah

  I am trying to make a thumbnail image from mp4 video using FFmpeg but I am getting the error that

  


  


  Output #0, image2, to 'output.jpg' :

  


  Output file #0 does not contain any stream

  


  


  the command I used is

  


  ffmpeg -i file_example_MP4_700KB.mp4 -ss 00:00:01 -vf thumbnail,scale=200:115 -qscale:v 2 -frames:v 1 -f image2 -c:v mjpeg output.jpg


  


  and I am not sure what I am doing wrong and I stuck throw it for so long.
Any suggestions will be good

  


  I am using Ubuntu 18.*

  


  full logs :-

  


  ffmpeg version n4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
 configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-avisynth --enable-cuda --enable-cuvid --enable- libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
libavutil      56. 22.100 / 56. 22.100
libavcodec     58. 35.100 / 58. 35.100
libavformat    58. 20.100 / 58. 20.100
libavdevice    58.  5.100 / 58.  5.100
libavfilter     7. 40.101 /  7. 40.101
libswscale      5.  3.100 /  5.  3.100
libswresample   3.  3.100 /  3.  3.100
libpostproc    55.  3.100 / 55.  3.100
Input #0, mp3, from 'file_example_MP3_700KB.mp3':
Metadata:
genre           : Cinematic
album           : YouTube Audio Library
title           : Impact Moderato
artist          : Kevin MacLeod
Duration: 00:00:27.25, start: 0.034531, bitrate: 224 kb/s
Stream #0:0: Audio: mp3, 32000 Hz, stereo, fltp, 224 kb/s
Metadata:
  encoder         : LAME3.99r
Output #0, image2, to 'output.jpg':
Output file #0 does not contain any stream


  


• Issues with Discord JS Music Bot

  5 décembre 2020, par Thresio

  I am in the process of creating a Discord bot with JS, giving it management, auto role, etc. I just got to the music section of it and I can't quite figure out whats wrong.

  



  I believe I have installed FFmpeg correctly, as I have access to it from within the terminal. I have also used npm to bring ytdl-core and opusscript into my program.

  



  What this should do is make the bot join the chat, then play the Youtube link. Currently, I am not error checking the second argument as I just wanted to get it working initially. I have implemented several different instances of .toString() and String() however it always gives the same error listed below.

  



  . The program still throws this error :

  



  TypeError [ERR_INVALID_ARG_TYPE]: The "file" argument must be of type string. Received type object
TypeError [ERR_INVALID_ARG_TYPE]: The "file" argument must be of type string. Received type object

C:\Users\Thresio's PC\Desktop\Discord Bot\node_modules\opusscript\build\opusscript_native_wasm.js:8
var Module=typeof Module!=="undefined"?Module:{};var moduleOverrides={};var
key;for(key in Module){if(Module.hasOwnProperty(key))
{moduleOverrides[key]=Module[key]}}Module["arguments"]=
[];Module["thisProgram"]="./this.program";Module["quit"]=function(status,toThrow) {throw
toThrow};Module["preRun"]=[];Module["postRun"]=[];var ENVIRONMENT_IS_WEB=false;var 
ENVIRONMENT_IS_WORKER=false;var ENVIRONMENT_IS_NODE=false;var ENVIRONMENT_HAS_NODE=false;var 
ENVIRONMENT_IS_SHELL=false;ENVIRONMENT_IS_WEB=typeof window==="object";ENVIRONMENT_IS_WORKER=typeof 
importScripts==="function";ENVIRONMENT_HAS_NODE=typeof process==="object"&&typeof 
process.versions==="object"&&typeof 
process.versions.node==="string";ENVIRONMENT_IS_NODE=ENVIRONMENT_HAS_NODE&&!ENVIRONMENT_IS_WEB&&!ENVIRONM
ENT_IS_WORKER;ENVIRONMENT_IS_SHELL=!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_NODE&&!ENVIRONMENT_IS_WORKER;var
scriptDirectory="";function locateFile(path){i
abort(TypeError [ERR_INVALID_ARG_TYPE]: The "file" argument must be of type 
string. Received type object). Build with -s ASSERTIONS=1 for more info. 


  



  Here is my code for calling play :

  



  case 'play':

            function play(connection, message){
                var server = servers[message.guild.id];

                server.dispatcher = connection.playStream(ytdl(server.queue[0], {filter: 'audioonly'}));

                server.queue.shift();

                server.dispatcher.on('end', function(){
                    if(server.queue[0]){
                        play(connection, message);
                    }else {
                        connection.disconnect();
                    }
                })
            }

            if(!args[1]){
                message.channel.send('You need to provide a link!');
                return;
            }

            if(!message.member.voiceChannel){
                message.channel.send('You must be in a voice channel to play music!');
                return;
            }

            if(!servers[message.guild.id]) servers[message.guild.id] = {
                queue: []
            }

            var server = servers[message.guild.id];

            server.queue.push(args[1]);

            if(!message.guild.voiceConnection) message.member.voiceChannel.join().then(function(connection){
                play(connection, message);
            })
            break;


  



  If anyone could assist with this, I would be very grateful.

  



  EDIT : I unfortunately never figured out my main issue, but I have now found code that works (unlike mine :/).
For anyone else having this issue, I suggest using the code found here.
Works like a charm !