Tag Archives: MP4

How to Automatically Create a Subtitle for a Video


You have MP4 video file.
You want to create a subtitle to understand the video content.

  1. Split MP4 file to 9-minutes files (please refer to https://huybien.com/how-to-trim-or-cut-mp4-files-without-re-encoding/ for details).
  2. Log in https://www.veed.io
  3. Click the “+” icon.
  4. Upload a 9-minutes MP4 file.
  5. Click the “Subtitles” tab.
  6. Click the “Auto Translate” button. Select the language for the subtitle.
  7. Click the “Start” button. Wait for the process to be complete.
  8. Click the “Export” button.
  9. Ensure that the “Burn Subtitle” option is selected.
  10. Click the “Export Video” button. Wait for the process on the left to be complete.
  11. Click the “Download MP4” link.


How to Convert MP4 or MKV File to MP3 or M4A File


You have downloaded some MP4 or MKV video files.

You want to extract audio parts so that you could copy them to your iPhone to listen to them while turning off the display of your phone.


  • Download this portable application to your Windows.
  • Unzip the files to a location.
  • Open Mp4ToMp3_64.exe.
  • Click on the Add files button to add MP4 or MKV files to the application.
  • If you want to extract the original audio (for example the M4A format) then select Try extract original audio stream option below the Audio section on the right panel.
  • Click the Convert button.
  • Copy the MP3 or M4A files to your phone.

This procedure can be used for extracting audio from M4B (Apple audiobook file format) file to M4A or MP3 file too.