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• How to batch "touch" files in subfolder with data from parent folder

  12 août 2019, par Constantine Grigorakis

  I have a folder named "Video" on my Desktop and inside that folder are a bunch of .MTS video files. (00000.MTS, 00001.MTS, 00002.MTS etc...)

  There is also a subfolder "H.265" (Video > H.265) which contains files (00000.mp4, 00001.mp4, 00002.mp4 etc...) which were made by converting the files from the parent folder. The problem is they don’t contain the correct date created metadata.

  I want to use the command

  touch -r 00000.MTS 00000.mp4
  
  touch -r 00001.MTS 00001.mp4
  
  ...
  
  touch -r 000mn.MTS 000mn.mp4

  to copy the date from the MTS to the mp4 file.

  Is there a way I could write a for loop or something to do this for every single file ?

  I am using MacOS Mojave.

• How to set metadata year for a mp3 file and fetch it back in android ?

  6 mai 2019, par Aashit Shah

  I have been changing the metadata of input mp3 file and storing it in output all the metadata is successfully changing but the year metadata is getting as null.

  Below is my code.

  This is how I fetch the metadata in android :

       MediaMetadataRetriever mmr = new MediaMetadataRetriever();
  
                mmr.setDataSource(input);
  
                String Album = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);
  
                String Artist = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);
  
                String Title = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE);
  
                String Composer = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_COMPOSER);
  
                String Genre = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE);
  
                String Year = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_YEAR);
  
                Log.e("date","date"+mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DATE));

• Windows Pipes STDIN and STDOUT Parent Child proc communication IPC FFMPEG

  15 octobre 2018, par Evren Bingøl

  I am writing a simple WINDOWS app which demonstrates piping,

  I pass byte size data down to child proc, increment the value and send the char size data back to parent and loop until it reaches MAX_CHAR
  Pretty much demonstration of "i++" with IPC.

  Parent Process

  while(i<256){
  
      bSuccess = WriteFile(g_hChildStd_IN_Wr, chBuf, sizeof(char), &dwWritten, NULL);
  
      bSuccess = ReadFile(g_hChildStd_OUT_Rd, chBuf, sizeof(char), &dwRead, NULL); // IF THERE IS NO FFLUSH IT BLOCKS
  
  }

  And in Child

  while (i<256){
  
          byte data=0;
  
          fread(&data, sizeof(char), 1, stdout);
  
          data++;
  
          fwrite(&data, sizeof(char), 1, stdout);
  
          //fflush(stdout); IF I DO NOT HAVE THIS  PARENT BLOCKS ON READ
  
  }

  First of all if I do not FFLUSH child proc stdout, the parent blocks on reading child’s stdout.

  How can one run this code without having to fflush child’s stdout.

  Closing the pipe after child’s first write is not an option as it is in a loop and needs to execute 256 times.

  more generically I want the child to write N bytes to parent, parent read that N bytes do something and write back to child another N bytes and child does something with that N bytes and write to parent N bytes. This happens M times.

  thing is I can not use fflush because my final goal is to use a child process that is not implemented by me.

  My final goal is to pipe data to FFMPEG encode the data and read back from the stdin and do this over and over again with out having to fork a new FFMPEG process for each image frame but rather fork one instance of FFMPEG and pipe data in and read data out from it. And since I did not implement ffmpeg and I can not change the source code.

  thanks

  Thanks