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• avcodec, avutil : allow more control about how samples are skipped

  27 septembre 2014, par wm4

  avcodec, avutil : allow more control about how samples are skipped
  Add CODEC_FLAG2_SKIP_MANUAL (exposed as "skip_manual"), which makes
  
  the decoder export sample skip information via side data, instead
  
  of applying it automatically. The format of the side data is the
  
  same as AV_PKT_DATA_SKIP_SAMPLES, but since AVPacket and AVFrame
  
  side data constants overlap, AV_FRAME_DATA_SKIP_SAMPLES needs to
  
  be introduced.
  This is useful for applications which want to do the timestamp
  
  calculations manually, or which actually want to retrieve the
  
  padding.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/APIchanges
  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/options_table.h
  • [DH] libavcodec/utils.c
  • [DH] libavcodec/version.h
  • [DH] libavutil/frame.h
  • [DH] libavutil/version.h

• How to fix the problem I'm having with FFmpeg ?

  23 février 2023, par John

  I'm working with the ffmpeg library to convert mp4 video files to mp3 audio files.
Here is my code :

  


  package com.exer;


import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Environment;
import android.widget.Toast;
import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler;
import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
import com.github.hiteshsondhi88.libffmpeg.FFmpegLoadBinaryResponseHandler;

public class MainActivity extends Activity {
    
    FFmpeg ffmpeg;
    private ProgressDialog progressDialog;
    
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        
        
        try {
            setUp();
            String[] command = {
                "-i", getPaths()+"/dir/input.mp4", "-vn", getPaths()+"/dir/output.mp3"
            };
            //convert("ffmpeg -i input.mp4 -vn output.mp3");
            convert(command);
            
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(), e.getCause().toString(), Toast.LENGTH_SHORT).show();
        }
    }
    
    
    public void setUp() throws Exception {
        
        if(ffmpeg == null) {
            
            ffmpeg = FFmpeg.getInstance(this);
            ffmpeg.loadBinary(new FFmpegLoadBinaryResponseHandler(){
                    
            @Override
            public void onFailure() {
                Toast.makeText(getApplicationContext(), "failed to load library", Toast.LENGTH_SHORT).show();   
            }
                    
            @Override
            public void onSuccess() {
                Toast.makeText(getApplicationContext(), "loaded!", Toast.LENGTH_SHORT).show();
            }
                    
            @Override
            public void onStart() {
                        
            }
                    
            @Override
            public void onFinish() {
                        
            }
                    
                    
            });
            
        }
        
    }
    
    
    private void convert(String[] cmd) throws Exception {
        
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler(){
            
            @Override
            public void onFailure(String message){
                super.onFailure(message);
            }
            
            @Override
            public void onFinish(){
                super.onFinish();
                Toast.makeText(getApplicationContext(), "finished!", Toast.LENGTH_SHORT).show();
            }
            
            @Override
            public void onStart(){
                super.onStart();
                Toast.makeText(getApplicationContext(), "start conversion...", Toast.LENGTH_SHORT).show();
            }
            
            @Override
            public void onProgress(String message){
                super.onProgress(message);
            }
        });
        
    
    }
    
    private String getPaths() {
        return Environment.getExternalStorageDirectory().getPath();
    }
    
}


  


  When I run the app, the Toast messages are shown :

  


  loaded!
start converting...
finished! as I write them in the functions, apart that nothing else happens the file is not converted what's wrong ?

  


  Here my manifest file :

  


  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<manifest package="com.exer">&#xA;    &#xA;    &#xA;    &#xA;    &#xA;    &#xA;        &#xA;            &#xA;                <action></action>&#xA;&#xA;                <category></category>&#xA;            &#xA;        &#xA;    &#xA;&#xA;</manifest>&#xA;

  


  I've tried to delete the specified file on the phone to see what erros I might got, but still those three Toasts.

  


• Crontab starts again befor the process of conversion in ffmpeg ends(depending on time supose /2 minutes) How to Control that ?

  18 décembre 2016, par A Sahra

  I am running a bash .sh file every two minutes with crontab. the problem is that when crontab runs bash file the process of ffmpeg video conversion starts,the conversion time varies depending on length of videos, i have set the crontab to run every two minutes. crontab runs again after two minutes before end of ffmpeg conversion.

  How to Figure out :

  control of crontab and conversion process so the crontab doesn’t starts again until process of conversion is not completed.

  #!/bin/bash
  
  # set PATH to check existance of video file in this directory
  
  checkfiles=/home/webuser/public_html/shareportal/convert_Up_videos/*
  
  checkforfiles=/home/webuser/public_html/shareportal/convert_Up_videos
  
  movetodire=/home/webuser/public_html/shareportal/uploaded_videos/
  
  conversionprocessdir=/home/webuser/public_html/shareportal/conversion_process/
  
  movetoArchive=/home/webuser/public_html/shareportal/Video_Archive/
  
  blockpath=/home/webuser/public_html/shareportal/block.txt
  
  processid=/home/webuser/public_html/shareportal/processid.txt
  
  #format of output video file
  
  webm='webm'
  
  if [ "$(ls -A $checkforfiles)" ]
  
  then 
  
  #check directory for files to convert
  
  for f in $checkfiles
  
      do  
  
          fullfilename="$f"
  
          filename=$(basename "$f")
  
          filewithoutextforimage="${filename%.*}"
  
          nametofile=$filewithoutextforimage | cut -c1-10;
  
          echo $filewithoutextforimage | cut -c1-10 1> $blockpath 2>&1
  
      filewithoutext="${f%.*}"
  
      fileextention="${f##*.}"
  
      image_path='/home/webuser/public_html/shareportal/video_images/'$filewithoutextforimage'.png'
  
      outputfilename=$conversionprocessdir"$filewithoutextforimage.webm"
  
      #ffmpeg conversion process starts here
  
      if (ffmpeg -i "$f" "$outputfilename" 1>> $blockpath 2>&1) 
  
      then 
  
          #Extract Image of video file on provided time stamp
  
          if (ffmpeg -ss 00:00:06 -i "$f" -vframes:v 1 "$image_path") 
  
          then
  
              echo "Image Extracted"
  
          else
  
              echo "Could not Extract Image"
  
          fi
  
          echo "Video Converted";
  
      else
  
          echo "Could Not Convert Video"
  
      fi
  
      #conversion Ends!!
  
      mv "$outputfilename" $movetodire
  
      mv "$fullfilename" $movetoArchive
  
  done
  
  else
  
  echo "File Not Found Directory is empty!!!-----"
  
  fi