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• Record rtsp stream to a file to be played later

  16 avril 2021, par Саня Рыбалко

  everyone.
  
I have a UWP app, which can stream rtsp streams from online ip cameras by means of FFmpegInterop NuGet package. This is how I use the FFmpegInteropMSS object to set mediaElement's source to the rtsp stream :
  

  


          FFmpegInteropMSS ffmpeg = await FFmpegInterop.FFmpegInteropMSS.CreateFromUriAsync("rtsp://88.84.52.66/axis-media/media.amp");
        MediaStreamSource streamSource = ffmpeg.GetMediaStreamSource();
        mediaElement.SetMediaStreamSource(streamSource);
        mediaElement.Play();


  


  But I have run into a problem - I need to make it possible to record the stream in a local file to be played later. I have found out this is possible while using ffmpeg console, but I would prefer to use some c# tools(not only FFmpegInterop library) to do it.
  
Thanks for your help in advance.

  


• How to convert mp4 to mp3 in Android Java ?

  16 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 works so far. Please help me on this. Thank you.

  


• FFMPEG restream ends in 403 forbidden

  2 décembre 2018, par John Chin

  I’m trying to restream locally a .m3u8 iptv link ( http://link:port/live/username/password/3820.m3u8 ) using Nginx...
  I’ve used this command : ffmpeg -i [m3u8 link] -vcodec libx264 -b:v 500k -f flv rtmp ://192.168.1.8:1935/live/play
  It seems to work, but after 30/40 seconds, ffmpeg follows a redirect of the iptv-m3u8 and ends in "403 forbidden"...
  I’ve found online that I have to add some parameters, but I don’t know which one are this params...
  Can you help me ?
  Thank you in advance