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• SegmentedIndexBox (SIDX) not generated when using WEBM over DASH

  11 juillet 2014, par Flock Dawson

  I’m trying to get the Industry Format DASH player to work with WEBM audio/video files. However, I’m running in the same error again and again, and Google doesn’t seem to give much help.

  To start with, I created different streams of the same file (different resolutions and bitrates) using this tutorial : https://developer.mozilla.org/en-US/docs/Web/HTML/DASH_Adaptive_Streaming_for_HTML_5_Video

  Then, I downloaded the Industry Format DASH player (http://dashif.org/software/) and pointed it to the DASH manifest I created. When I try to play the video in Chrome, I get the following log :

  Parsing complete: ( xml2json: 3ms, objectiron: 2ms, total: 0.005s) dash.all.js:3
  
  Manifest has loaded. dash.all.js:3
  
  MediaSource is open! dash.all.js:3
  
  Event {clipboardData: undefined, path: NodeList[0], cancelBubble: false, returnValue: true, srcElement: MediaSource…}
  
  dash.all.js:3
  
  Video codec: video/webm;codecs="vp8" dash.all.js:3
  
  No text tracks. dash.all.js:3
  
  Audio codec: audio/webm;codecs="vorbis" dash.all.js:3
  
  Duration successfully set to: 27.2 dash.all.js:3
  
  Perform SIDX load: https://*****/street_orig_125k_final.webm dash.all.js:3
  
  Perform SIDX load: https://*****/street_audio_final.webm dash.all.js:3
  
  Uncaught RangeError: Offset is outside the bounds of the DataView 

  From this log, I distilled that the manifest is fetched and processed correctly, but something goes wrong when trying to process the SIDX (SegmetIndexBox). I tried another (third-party) source, which works perfectly. I analysed the response returned by the server when trying to fetch the SIDX, and when converted to a readable presentation, the text ’Dsidx’ can be found in this response. So, I analyzed the WEBM file I provide (hexdump and grep), but I cannot find such a SIDX. My conclusion is that the SIDX is never added to the WEBM file.

  From the tutorial I used, I guess the generation of the SIDX is handled by the samplemuxer command, which does not offer any additional parameters. Is there anyone who has more experience in generating this SIDX ?

• Framerate live streaming webm with dash and ffmpeg

  14 mai 2016, par Jones

  I am streaming a live video with ffmpeg and dash.js using
  these instructions. It works well except that the video is playing at a too high framerate. No framerate is specified in the manifest.
  Creating the Chunks :

  SET VP9_LIVE_PARAMS=-speed 6 -threads 8 -static-thresh 0 -max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1
  
  ffmpeg -re -r 25 -i tcp://localhost:8891 ^
  
  -map 0:0 ^
  
    -pix_fmt yuv420p ^
  
    -c:v libvpx-vp9 ^
  
      -s 800x600 -keyint_min 25 -g 25 %VP9_LIVE_PARAMS% ^
  
      -f webm_chunk ^
  
      -header "webm_live/glass_360.hdr" ^
  
      -chunk_start_index 1 ^
  
    webm_live\glass_360_%%d.chk ^

  Creating the Manifest :

  ffmpeg ^
  
    -f webm_dash_manifest -live 1 ^
  
     -r 25 ^
  
    -i webm_live/glass_360.hdr ^
  
    -c copy ^
  
    -map 0 ^
  
    -r 25 ^
  
    -framerate 25 ^
  
    -f webm_dash_manifest -live 1 ^
  
      -adaptation_sets "id=0,streams=0" ^
  
      -chunk_start_index 1 ^
  
      -chunk_duration_ms 1000 ^
  
      -time_shift_buffer_depth 7200 ^
  
      -minimum_update_period 7200 ^
  
    webm_live/glass_live_manifest.mpd

  Manifest :

  <?xml version="1.0" encoding="UTF-8"?>
  
  <mpd xmlns="urn:mpeg:DASH:schema:MPD:2011" type="dynamic" minbuffertime="PT1S" profiles="urn:mpeg:dash:profile:isoff-live:2011" availabilitystarttime="2016-03-30T13:02:53Z" timeshiftbufferdepth="PT7200S" minimumupdateperiod="PT7200S">
  
  <period start="PT0S">
  
  <adaptationset mimetype="video/webm" codecs="vp9" bitstreamswitching="true" subsegmentalignment="true" subsegmentstartswithsap="1">
  
  <contentcomponent type="video"></contentcomponent>
  
  <segmenttemplate timescale="1000" duration="1000" media="glass_$RepresentationID$_$Number$.chk" startnumber="1" initialization="glass_$RepresentationID$.hdr"></segmenttemplate>
  
  <representation bandwidth="1000000" width="800" height="600" codecs="vp9" mimetype="video/webm" startswithsap="1"></representation>
  
  </adaptationset>
  
  </period>
  
  </mpd>

  Any Ideas how to fix this ?

• ffmpeg permission denied in android studio ?

  16 avril 2023, par Rakesh Saini

  I want to merge an audio in video using ffmpeg of the following dependency but getting the permission denied error.

  


   Cannot run program "/data/user/0/com.example.mytestapp/files/ffmpeg": error=13, Permission denied


  


  Dependency I am using

  


   implementation 'com.writingminds:FFmpegAndroid:0.3.2'


  


  I am using following code to merge an audio into the video. I added the dependency and provided the path of the video. I also placed the ffpmeg.exe into the assets folder

  


          package com.example.mytestapp.Activity;
    
    import androidx.annotation.NonNull;
    import androidx.appcompat.app.AppCompatActivity;
    
    import android.Manifest;
    import android.content.Context;
    import android.content.pm.PackageManager;
    import android.content.res.AssetManager;
    import android.os.Build;
    import android.os.Bundle;
    import android.os.Environment;
    import android.util.Log;
    import android.widget.Toast;
    
    import com.example.mytestapp.R;
    import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler;
    import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
    import com.github.hiteshsondhi88.libffmpeg.exceptions.FFmpegCommandAlreadyRunningException;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    public class MainActivity3 extends AppCompatActivity {
        Context context;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main3);
    
        }
        protected Boolean doInBackground() {
            String ffmpegPath = getApplicationContext().getFilesDir().getAbsolutePath() + "/ffmpeg";
            Log.e("called ", ffmpegPath);
    
            String vpath = " /storage/emulated/0/DCIM/Camera/VID_20230325_083306.mp4";
            String aPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/Seesekadil.mp3";
    
            String oPath = "/storage/emulated/0/DCIM/202304_15-223653rangeela.mp4";
            String[] cmd = {"-i", vpath, "-i", aPath, "-shortest", oPath};
            try {
                FFmpeg.getInstance(getApplicationContext()).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 onResume() {
            super.onResume();
            checkPermission();
            File file = new File(getApplicationContext().getFilesDir(), "ffmpeg");
            if (!file.canExecute()) {
                file.setExecutable(true);
            }
            doInBackground();
    
        }
    
        private void checkPermission() {
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
                return;
            }
            // request camera permission if it has not been grunted.
            if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ||
                    checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED ||
                    checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
            ) {
    
                requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            }
    
        }
    
        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            switch (requestCode) {
                case 1:
                    if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                        Toast.makeText(MainActivity3.this, "permission has been grunted.", Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(MainActivity3.this, "[WARN] permission is not grunted.", Toast.LENGTH_SHORT).show();
                    }
                    break;
            }
        }
    
    }