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• How to split a .mkv file into sounds and vedio file ?

  13 février 2020, par Ken Yip

  I have a mkv file which contain 3 streams. I use ffprobe to get the info of my mkv file.

  ffprobe ./demo/test2.mkv 

  I got this output

  Input #0, matroska,webm, from './demo/test2.mkv':
  
  Metadata:
  
  encoder         : libebml v0.7.7 + libmatroska v0.8.1
  
  creation_time   : 2011-02-16T16:06:17.000000Z
  
  Duration: 00:03:41.08, start: 0.000000, bitrate: 1363 kb/s
  
  Stream #0:0: Video: rv40, yuv420p, 720x480, SAR 1:1 DAR 3:2, 29.97 tbr, 1k tbn, 1k tbc (default)
  
  Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp (default)
  
  Stream #0:2: Audio: aac (LC), 48000 Hz, stereo, fltp

  The audio streams should be vocal and background music. I would like to extract them from the video.

  I have try to do so with those command

  ffmpeg -i ./demo/test2.mkv -map_channel 0.1.0 -y ch0.wav -map_channel 0.2.0 -y ch1.wav

  However, it output the same audio file. Is there any mistake I have made ? Thanks a lot.

• Pass argument through .bat file to .exe file that converted by 'PyInstaller'

  23 novembre 2019, par Ayoub Ocarina

  I got an error when passing arguments through .bat file to .exe file that converted by PyInstaller
  In my python script I import the following libraries :

  import time
  
  from contextlib import closing
  
  from PIL import Image
  
  import subprocess
  
  from audiotsm import phasevocoder
  
  from audiotsm.io.wav import WavReader, WavWriter
  
  from scipy.io import wavfile
  
  import numpy as np
  
  import re
  
  import math
  
  from shutil import copyfile, rmtree
  
  import os
  
  import argparse
  
  from pytube import YouTube
  
  import cv2
  
  from datetime import datetime
  
  import datetime
  
  import os.path
  
  import shutil
  
  import webbrowser

  and this is my .bat file content :

  mode con: cols=100 lines=40
  
  @echo off
  
  COLOR 0A
  
  title VideoCuts 
  
  :LOOP
  
  if "%~1"=="" goto :END
  
  ShortCut.exe --input_file "%~1" --silent_threshold 0.1 --silent_speed 9999999.00 --frame_margin 5 --sample_rate 48000 --frame_quality 1 --output_file "%~n1_%date:~-10,2%%date:~-7,2%%date:~-4,4%_%time:~0,2%%time:~3,2%%time:~6,2%_videocuts.mp4"
  
  pause

  I also tested using this .bat file :

  ShortCut.exe --input_file="%~1" --silent_threshold=0.1 --silent_speed=9999999.00 --frame_margin=5 --sample_rate=48000 --frame_quality=1 --output_file="videocuts.mp4"

  this is my error message images during processing

• After downloading the file i got 0 byte file size, I dont know how to solve this error ? [closed]

  7 octobre 2024, par Saurabh Chauhan

  This is the handler function which converts a given format to another format but when i provide additional options(like trim audio,bitrate,codec,sample rate etc) to audio and video then it gives me 0 byte file after converting and if i do not include additional options then it gave me correct file.

  


  Please look into this and provide me solution.

  


  const handleConvert = async () => {

  if (!ffmpeg) return;

  setConverting(true);

  for (let uploadedFile of uploadedFiles) {
    const { file } = uploadedFile;
    const fileNameWithoutExtension = getFileNameWithoutExtension(file.name);
    const inputFile = file.name;
    let outputFile;
    let outputFormat;
    const { bitrate, channels, codec, sampleRate, trimStart, trimEnd, volume } = optionsdata;

    try {
      await ffmpeg.writeFile(inputFile, await fetchFile(file));
      let command = ['-i', inputFile];
      // Handle audio conversion with advanced options
> if (supportedAudioFormats.some(ext => file.name.endsWith(ext)) || supportedVideoFormats.some(ext => file.name.endsWith(ext))) {
        outputFile = `${fileNameWithoutExtension}.${audioFormat}`;
        outputFormat = audioFormat;

        // Add trim options if they exist
        if (trimStart && trimEnd) {
          command.push('-ss', trimStart, '-to', trimEnd);
        } else if (trimStart) {
          command.push('-ss', trimStart);
        }

        // Adjust volume if specified
        if (volume && volume !== 'no change') {
          command.push('-filter:a', `volume=${volume}`);
        }
        
        // Apply advanced audio settings like codec, bitrate, and channels
        if (codec) {
          command.push('-c:a', codec);
        }
        if (bitrate) {
          command.push('-b:a', `${bitrate}k`);
        }
> if (channels && channels !== 'no change') {
          command.push('-ac', channels === 'mono' ? '1' : '2');
        }
        if (sampleRate && sampleRate !== 'no change') {
          command.push('-ar', sampleRate);
        }

        // Add output file to the command
        command.push(outputFile);
        console.log('Command Array:', command);
        // Execute FFmpeg command
        await ffmpeg.exec(command);

      } else if (supportedImageFormats.some(ext => file.name.endsWith(ext))) {
        // Image conversion logic
        outputFile = `${fileNameWithoutExtension}.${imageFormat}`;
        outputFormat = imageFormat;
        command.push(outputFile);
        await ffmpeg.exec(command);

      } else if (supportedSubtitleFormats.some(ext => file.name.endsWith(ext))) {
        // Subtitle conversion logic
        outputFile = `${fileNameWithoutExtension}.${subtitleFormat}`;
        outputFormat = subtitleFormat;
        command.push(outputFile);
        await ffmpeg.exec(command);

      } else {
        console.error('Unsupported file type: ', file.name);
        continue; // Skip unsupported files
      }
      // Create Blob and URL for the converted file
      const data = await ffmpeg.readFile(outputFile);
      const convertedBlob = new Blob([data.buffer], {
        type: outputFormat === 'png' ? 'image/png' : `audio/${outputFormat}` || `text/vtt`,
      });
      const convertedUrl = URL.createObjectURL(convertedBlob);

      setConvertedFiles((prevFiles) => [
        ...prevFiles,
        { name: outputFile, url: convertedUrl, format: outputFormat },
      ]);
    } catch (error) {
      console.error('Conversion error:', error);
    }
  }

  setConversionFinished(true);
  setConverting(false);
  setoptionsdata({
    'codec':'',
    'bitrate':'',
    'channels':'',
    'volume':'',
    'sampleRate':'',
    'trimStart':'',
    'trimEnd':''
  });
};