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• How to get a file converted by ffmpeg in Android : permission denied

  2 juin 2021, par Omid.N

  I am trying to use FFmpeg in my android app. So I want to test it if it works before moving on. I use an external library : github link
  
The code looks like this :

  


  package net.omidn.aslanmediaconverter;

import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.arthenica.ffmpegkit.ExecuteCallback;
import com.arthenica.ffmpegkit.FFmpegKit;
import com.arthenica.ffmpegkit.FFmpegSession;
import com.arthenica.ffmpegkit.Session;

import net.bramp.ffmpeg.job.FFmpegJob;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;


public class MainActivity extends AppCompatActivity {
    
    private static final String TAG = "MainActivity";
    FFmpegJob myjob;

    @Override
    protected void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView textView = (TextView) findViewById(R.id.text_view);


        FFmpegJob job = null;

        File inFile = new File("/storage/emulated/0/video_2021-05-29_17-50-20.mp4");
        String inputName = Uri.fromFile(inFile).toString();
        Log.d(TAG, inputName);
        Log.d(TAG,"file exists : " + String.valueOf(inFile.exists()));
        Log.d(TAG,"file canRead : " + String.valueOf(inFile.canRead()));

        FFmpegSession fFmpegSession = FFmpegKit.executeAsync("-i file:///storage/emulated/0/video_2021-05-29_17-50-20.mp4 -c:v mpeg4 file:///storage/emulated/0/out.mp4",
                new ExecuteCallback() {
                    @Override
                    public void apply(Session session) {

                    }
                });
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        textView.setText("" + fFmpegSession.getState().name() + "    " + fFmpegSession.getOutput());
    }

}



  


  As you can see I give the files with file:/// protocol. If I don't use that the resault is the same. The three lines of Log.d(...) will print :

  


  2021-06-03 00:58:08.869 8376-8376/net.omidn.aslanmediaconverter D/MainActivity: file:///storage/emulated/0/video_2021-05-29_17-50-20.mp4
2021-06-03 00:58:08.869 8376-8376/net.omidn.aslanmediaconverter D/MainActivity: file exists : true
2021-06-03 00:58:08.869 8376-8376/net.omidn.aslanmediaconverter D/MainActivity: file canRead : false


  


  The video file has read access on the storage :


  


• Convert mkv to mp4

  7 juin 2021, par KalemKutu

  I have a video file input.mkv
It contains 2 audios and only 1 substring.

  


  I want to convert it in mp4 with same quality.
It should contain same : 2 audios and 1 substring.

  


  I tried :

  


  ffmpeg -i input.mkv -map 0:v:0 -map 0:a:0 -map 0:a:1 -map 0:s:0 -c copy output.mp4

  


  I got an error message :

  


      Could not find tag for codec subrip in stream #3, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:3 -- 


  


  .

  


  I tried also

  


  ffmpeg -i input.mkv -c copy -c:s mov_text output.mp4

  


  But this line converts audio=1 and substitle=1, but NO audio 2.

  


  Anyone who can help me ?

  


  Thanks,
Kalem

  


  PS : I am using mac version of ffmpeg downloaded on "2021-06-05"

  


• ffmpeg -(codec png) is probably disabled [closed]

  2 juin 2021, par Lobs

  I installed the ffmpeg by sudo-apt install ffmpeg
  ,
and below is the my ffmpeg environment
  
ffmpeg version 4.4-1ubuntu0 18.04.sav0 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1 18.04)
  
when I want to convert one mp4 file to flac,I use the command below
  
ffmpeg -i xxx.mp4 yyy.flac
  
then error occourred
  
Automatic encoder selection failed for output stream #0:0. Default encoder for format flac (codec png) is probably disabled. Please choose an encoder manually.
Error selecting an encoder for stream 0:0
I check the codecs of my ffmpeg using command
  
ffmpeg -codecs | grep PNG
  
..V..S apng APNG (Animated Portable Network Graphics) image
  
..V..S png PNG (Portable Network Graphics) image
  
Is there anyway to enable the decode and encode for PNG ?

  


  please refer the full log below
  
ffmpeg version 4.4-1ubuntu0 18.04.sav0 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1 18.04)
  
configuration : —prefix=/usr —extra-version='1ubuntu0 18.04.sav0' —toolchain=hardened —libdir=/usr/lib/x86_64-linux-gnu —incdir=/usr/include/x86_64-linux-gnu —arch=amd64 —enable-gpl —disable-stripping —enable-avresample —disable-filter=resample —enable-gnutls —enable-ladspa —enable-libaom —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libcodec2 —enable-libdav1d —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libjack —enable-libmp3lame —enable-libmysofa —enable-libopenjpeg —enable-libopenmpt —enable-libopus —enable-libpulse —enable-librabbitmq —enable-librubberband —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libsrt —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx265 —enable-libxml2 —enable-libxvid —enable-libzimg —enable-libzmq —enable-libzvbi —enable-lv2 —enable-omx —enable-openal —enable-opencl —enable-opengl —enable-sdl2 —enable-pocketsphinx —enable-librsvg —enable-crystalhd —enable-libmfx —enable-libdc1394 —enable-libdrm —enable-libiec61883 —enable-nvenc —enable-chromaprint —enable-frei0r —enable-libx264 —enable-shared
postproc configuration : —enable-gpl —enable-shared —prefix=/usr/local
  
libavutil 56. 70.100 / 56. 70.100
  
libavcodec 58.134.100 / 58.134.100
  
libavformat 58. 76.100 / 58. 76.100
  
libavdevice 58. 13.100 / 58. 13.100
  
libavfilter 7.110.100 / 7.110.100
  
libavresample 4. 0. 0 / 4. 0. 0
  
libswscale 5. 9.100 / 5. 9.100
  
libswresample 3. 9.100 / 3. 9.100
  
libpostproc 55. 9.100 / 55. 9.100
  
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'id_1_video.mp4' :
  
Metadata :
  
major_brand : isom
  
minor_version : 512
  
compatible_brands : isomiso2avc1mp41
  
encoder : Lavf55.33.100
  
copyright :
  
copyright-eng :
  
Duration : 00:00:02.27, start : 0.000000, bitrate : 2188 kb/s
  
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/smpte170m), 464x960, 2262 kb/s, 30.19 fps, 30 tbr, 12800 tbn, 25600 tbc (default)
  
Metadata :
  
handler_name : VideoHandler
  
vendor_id : [0][0][0][0]
  
Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 64 kb/s (default)
  
Metadata :
  
handler_name : SoundHandler
  
vendor_id : [0][0][0][0]
  
Automatic encoder selection failed for output stream #0:0. Default encoder for format flac (codec png) is probably disabled. Please choose an encoder manually.
  
Error selecting an encoder for stream 0:0