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• Converting an audio file from .oga format to .mp3 using ffmpeg package on nodeJs produces a max of 3 seconds output file no matter the input duration

  15 janvier 2024, par JnrLouis

  I am downloading an audio file in .oga format and saving it. Then I am trying to convert the file to .mp3 format, but the issue is the output file is always truncated and a maximum of 3 seconds. I have gone through the fluent-ffmpeg library and I can't seem to find what I'm doing wrong.

  


  I have ffmpeg installed and I'm using the fluent-ffmpeg library. The downloaded .oga file doesn't seem to have any issues, the issue is after it gets converted to .mp3.

  


  I also tried converting to .wav, and I faced the same issue.

  


  Below is my current code :

  


  const fs = require("fs");
const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
const ffmpeg = require('fluent-ffmpeg');
ffmpeg.setFfmpegPath(ffmpegPath);
const axios = require("axios");

const inputPath = __dirname + '/audio/input.oga';
const outputPath = __dirname + '/audio/output.mp3';

const saveVoiceMessage = async (url) => {
    try {
        const response = await axios({
            method: 'GET',
            url: url,
            responseType: 'stream'
        });
        const inStream = fs.createWriteStream(inputPath);
        await response.data.pipe(inStream);
    } catch (error) {
        console.error(error);
    }
}

const convertToMp3 = async () => {
    try {
        const outStream = fs.createWriteStream(outputPath);
        const inStream = fs.createReadStream(inputPath);
        // I also tried using the inputPath directly, still didn't work
        ffmpeg(inStream)
            .toFormat("mp3")
            .on('error', error => console.log(`Encoding Error: ${error.message}`))
            .on('exit', () => console.log('Audio recorder exited'))
            .on('close', () => console.log('Audio recorder closed'))
            .on('end', () => console.log('Audio Transcoding succeeded !'))
            .pipe(outStream, { end: true })
    } catch (error) {
        console.error(error);
    }
}

const saveAndConvertToMp3 = async (url) => {
    try {
        await saveVoiceMessage(url);
        await convertToMp3();
        }

    } catch (error) {
        console.error(error);
    }
}


  


• How to use FFmpeg in android to edit video ? [closed]

  24 juillet 2023, par Rakesh Saini

  i am learning android. I tried the ffmpeg lib to merge the video and audio, but getting ffmpeg permission denied error. I search lot of but unable to find the solution.

  


  Please anyone help if have the solution.

  


          package com.example.mytestapp.Activity;
    
    import android.content.Context;
    import android.os.AsyncTask;
    import android.os.Environment;
    import android.util.Log;
    import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler;
    import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
    import com.github.hiteshsondhi88.libffmpeg.exceptions.FFmpegCommandAlreadyRunningException;
    
    public class MergeAudioVideoTask extends AsyncTask {
        private static final String TAG = MergeAudioVideoTask.class.getSimpleName();
    
        private Context context;
        private String videoFilePath;
        private final String audioFilePath;
        private final String outputFilePath;
    
        public MergeAudioVideoTask(String videoFilePath, String audioFilePath, String outputFilePath) {
            this.videoFilePath = videoFilePath;
            this.audioFilePath = audioFilePath;
            this.outputFilePath = outputFilePath;
        }
    
    //    String inputAudioPath = "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3";
        String outputVideoPath = Environment.getExternalStorageDirectory() + "/trimVideos" + "sangtest.mp4";
    
    //    String[] command = {"-i", vpath, "-i", inputAudioPath, "-c:v", "copy", "-c:a", "aac", "-map", "0:v:0", "-map", "1:a:0", "-shortest", outputVideoPath};
    
    
        @Override
        protected Boolean doInBackground(Void... params) {
            String[] cmd = {"-i", videoFilePath, "-i", audioFilePath, "-shortest", outputVideoPath};
            try {
                FFmpeg.getInstance(context).execute(cmd, new ExecuteBinaryResponseHandler() {
                    @Override
                    public void onStart() {
                        Log.e("Started", "yes");
                    }
    
                    @Override
                    public void onProgress(String message) {
                        // do nothing
                    }
    
                    @Override
                    public void onFailure(String message) {
                        Log.e("Failed ", "yes");
                    }
    
                    @Override
                    public void onSuccess(String message) {
                        Log.e("Success ", "yes");
                    }
    
                    @Override
                    public void onFinish() {
                        // do nothing
                    }
                });
            } catch (FFmpegCommandAlreadyRunningException e) {
                e.printStackTrace();
            }
    
            return null;
        }
    
        @Override
        protected void onPostExecute(Boolean success) {
            if (success) {
            } else {
            }
        }
    
    }


  


  I am using this but getting 'permission denied error for ffmpeg' i have already added storage permission in manifiest.

  


• How to extract a fixed number of frames with ffmpeg ?

  10 mars 2016, par W. Han

  I am trying to extract a fixed number of frames uniformly from a bunch of videos(say 50 frames from each video, 10,000 videos in total).

  Since the duration varies, I calculated the ideal output fps for each video and take it as a parameter for ffmpeg extraction, but failed to get the required number of frames.

  Does anyone know how to extract a fixed number of frames with ffmpeg, or other tools ? Thanks !