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• FFmpeg doesn't work on android 10, goes strait to onFailure(String message) with empty message

  18 janvier 2020, par nolanic

  I’m using FFmpeg in one of my projects for video compression. On Android 10 (Google Pixel 3a), it goes straight to onFailure(String message) with empty message for any command sent for execution.

  so I have (api ’com.writingminds:FFmpegAndroid:0.3.2’) specified in my app gradle file,

  permission (android.permission.WRITE_EXTERNAL_STORAGE) in the manifest is specified

  So I do :

  InitializationCallback initializationCallback = new InitializationCallback();
  
      try {
  
          FFmpeg.getInstance(context).loadBinary(initializationCallback);
  
      } catch (FFmpegNotSupportedException e) {
  
          initializationCallback.onFailure();
  
          initializationCallback.onFinish();
  
      }

  Initializes just fine, no problems here.

  Later :

  void getData(File inputFile) {
  
  //inputFile points to: /storage/emulated/0/Android/data/{package_name}/files/temp_files/temp_1.mp4
  
          String[] cmd = ("-i " + inputFile.getAbsolutePath()).split(" ");
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }
  
      }
  
  
  
      @Override
  
      public void onStart() {
  
           //This method is called
  
      }
  
  
  
      @Override
  
      public void onSuccess(String message) {
  
           //This method is NOT called
  
           extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onProgress(String message) {
  
          //This method is NOT called
  
          extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onFailure(String message) {
  
          //This method is called and the message is empty
  
          extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onFinish() {
  
          //This method is called
  
      }

  If I do something like :

  String command = "-i ***/file1.mp4 -map 0:v -map 0:a -preset ultrafast -s:v 750:350 ***/file2.mp4";
  
  //file2.mp4 is a non existent file at this point
  
  // (***) --> is just a replacement for the full path of the file, just to keep things shorter here.
  
  
  
  String[] cmd = command.split(" ");
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }

  gives the same result, no video conversion, just a call to onFailure("Nothing")

  Even if I do :

  String[] cmd = {"-version"};
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }

  I get nothing, no output at all.

  I encountered this issue only on Android 10 so far, it works fine on other devices.

• ffmpeg include issue - some functions are missing

  27 septembre 2019, par Thomas Ayoub

  I try to follow and adapt this example to convert a video thanks to FFMPEG but some function seems to be missing like :

  int avcodec_open ( AVCodecContext * avctx, AVCodec * codec)     

  When I go in the doc to see where it come from, I find it in the file libavcodec/avcodec.h which is included in my program #include "libavcodec/avcodec.h" (in the top of my .h file).

  Given this, I don’t understand why Qt throw me this error :

  ../../Dev/Joker/libs/PhVideo/PhVideoEncoder.cpp:360:6: error: use of undeclared identifier 'avcodec_open'
  
      if (avcodec_open(c, codec) < 0) {

• FFmpeg - Check if folder contains a matching filename with 2 different extensions and ignore both files. Process only filenames with 1 extension

  9 septembre 2019, par slyfox1186

  I need to batch convert all mkv files in a folder recursively to mp4.

  If a filename exists and matches both extensions, ignore both files and process only filenames that contain mkv, without matching mp4.

  Example : cat.mkv exists in folder with cat.mp4 = ignore both files

  Example : cat.mkv exists in folder and cat.mp4 does not = process cat.mkv to cat.mp4

  I have included a script that doesn’t work well. It processes all mkv files and mp4 files. The mp4 files throw an error as FFmpeg will not encode the same format in this manner over itself.

  As always thank you to anyone who might have a few ideas.

  UPDATE : I may have gotten it to work. I changed a few things from the original. If anyone has success or an idea to improve I’m all ears. Thanks.

  VERSION 2

  @ECHO ON
  
  SETLOCAL
  
  PROMPT $G
  
  COLOR 0A
  
  
  
  REM Set FFmpeg.exe location if not in system PATH already
  
  SET FF=C:\MAB\local64\bin-video\ffmpeg.exe
  
  
  
  REM Set MKV files root folder to recursively search
  
  SET "mkvPATH=C:\Encoding\1_Original\Test\"
  
  
  
  REM Change into mkvPATH DIR
  
  CD "C:\Encoding\1_Original\Test"
  
  
  
  REM Set temp file name
  
  SET TEMPFILE=convert_mkv.bat
  
  
  
  REM Create empty convert file
  
  COPY NUL "%TEMPFILE%" >NUL 2>&1
  
  
  
  REM ADD @ECHO OFF to top of blank convert_mkv.bat script
  
  ECHO @ECHO OFF >>"%TEMPFILE%"
  
  
  
  REM Recursively search MKV root folder
  
  FOR /R "%mkvPATH%" %%G IN (*.mkv *.mp4) DO (
  
      SET "GPATH=%%~fG"
  
      SET "GNAME=%%~nG"
  
      SETLOCAL ENABLEDELAYEDEXPANSION
  
  
  
      REM Ignore all files that have both
  
      REM extensions ".mkv" and ".mp4" in the file name
  
      IF "%%~nG.mkv"=="%%~nG.mkv" (
  
          IF NOT EXIST "%%~nG.mp4" (
  
              CALL :DO_FFmpeg "!GPATH!"
  
              IF "%%~nG.mkv"=="%%~nG.mkv" (
  
                  IF EXIST "%%~nG.mp4" (
  
                      ECHO(>>"%TEMPFILE%"
  
                  ) ELSE ENDLOCAL
  
              )
  
          )
  
      )
  
  )
  
  GOTO END
  
  
  
  REM CALL variables for use in FFmpeg's command line
  
  :DO_FFmpeg
  
  IF "%~1"=="" GOTO :END
  
  FOR %%I IN ("%~1") DO (
  
      SET "FOLDER=%%~dpI"
  
      SET "NAME=%%~nxI"
  
  )
  
  
  
  REM Export info to "%TEMPFILE% and RUN ffmpeg.exe's command line in the cmd.exe window
  
  ECHO %FF% -y -i "%~1" -ss 0 -t 300 -codec copy "%FOLDER%%~n1.mp4">>"%TEMPFILE%" && %FF% | %FF% -y -i "%~1" -ss 600 -t 30 -codec copy "%FOLDER%%~n1.mp4"
  
  
  
  :END
  
  PAUSE
  
  EXIT /B