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• How to convert mo4 to mp3 in android java ?

  3 août 2023, par Akshit

  I have the mp4 link of a video but don't have a link for the mp3 version of that mp4 video. So is there any way that I can convert that mp4 video to mp3 in Android ? I saw some resources but nothing works for me. I have two ways in which I believe this can be achieved

  


  

  1. Convert the mp4 link to mp3 directly. ( Not Sure if this is achievable )

  


  2. Download the mp4 on the device with the help of a link and then use some code to convert that mp4 to mp3.

  


  


  I also tried some solutions which are available online

  


  https://github.com/tanersener/mobile-ffmpeg

  


  I tried the above library to achieve the final goal. But got Async command execution failed with returnCode=1. This error in the code I am using is

  


      private class Mp4ToMp3ConverterTask extends AsyncTask {

    @Override
    protected String doInBackground(String... params) {
        String mp4FilePath = params[0];
        String mp3OutputPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/output.mp3";

        String[] ffmpegCommand = {"-i", mp4FilePath, "-vn", "-ar", "44100", "-ac", "2", "-b:a", "192k", mp3OutputPath};


        Config.enableStatisticsCallback(new StatisticsCallback() {
            public void apply(Statistics newStatistics) {
                Log.d("Dekh", String.format("frame: %d, time: %d", newStatistics.getVideoFrameNumber(), newStatistics.getTime()));
            }
        });

        long executionIdd = FFmpeg.executeAsync(ffmpegCommand, new ExecuteCallback() {

            @Override
            public void apply(final long executionId, final int returnCode) {
                if (returnCode == RETURN_CODE_SUCCESS) {
                    Log.i("Dekh", "Async command execution completed successfully.");
                } else if (returnCode == RETURN_CODE_CANCEL) {
                    Log.i("Dekh", "Async command execution cancelled by user.");
                } else {
                    Log.i("Dekh", String.format("Async command execution failed with returnCode=%d.", returnCode));
                }
            }
        });

        FFmpeg.cancel(executionIdd);

        return mp3OutputPath;
    }
}


  


  Solution number 2 which I used is

  


  https://androidprogrammatically425516919.wordpress.com/2020/04/21/how-to-convert-video-to-audio-in-android-programmatically/

  


  But I got an error here also Failed to instantiate extractor. and another error is java.io.FileNotFoundException : open failed : EISDIR (Is a directory)
I tried the online available solution to solve these errors but nothing worked. Such as granting write permission. Providing a valid location to save the output.

  


  But nothing work so far. Please help me on this. Thank you

  


• avcodec/dpx : Fix B&W film scans from Lasergraphics Inc

  7 décembre 2020, par Harry Mallon

  avcodec/dpx : Fix B&W film scans from Lasergraphics Inc
  Signed-off-by : Harry Mallon <harry.mallon@codex.online>
  

  • [DH] libavcodec/dpx.c

• Is it possible to adjust the timeout for ffmpeg on SDP ?

  1er avril 2021, par user3474565

  I have rtpdump files that I would like to be able to convert to webm or mp4 on demand and on the fly. To do this, I'm streaming their packets out extremely rapidly and having ffmpeg read them in using an SDP file. The packets come through and are transcoded in a second or two, since the videos are fairly short. But then there is an additional 10-second wait afterward because the ffmpeg network timeout for SDP defaults to 10 seconds ; I'd like to reduce it. Unfortunately, the -timeout and -stimeout options don't seem to be available when I'm using -i with an SDP file (I get -timeout option not found).

  


  I looked around online, and it seems that 6 or 7 years ago people were having similar issues and some people made pull requests into FFmpeg to add this as an option for RSTP and SDP. I know this went through for RSTP because it's in the documentation know ; did anything ever happen with SDP ? Is it possible for me to set this option, or maybe to terminate ffmpeg manually when I know the stream is done ?