Quick tools for Video Editing

1. Split mp4 video files (loss-less quality):
   • Avidemux (freeware) – https://avidemux.sourceforge.net/download.html
     • Recommended config: Video encode: Copy . Audio encode: ACC (lav).
     • Other option: Filmora Video Editor (Split + Merge mp4)
2. Transcribe video audio into text:
   • 2.1. Using Windows Speech-to-Text:
     • 2.1.1. Setup pre-requirement software: VB-CABLE Virtual Audio Device (a virtual audio device working as virtual audio cable. All audio coming in the CABLE input is simply forwarded to the CABLE output). https://vb-audio.com/Cable/index.htm
       • Recommended config: Windows >> Settings >> Audio >> Output: “VB-Cable…”, Input (MIC): “VB-Cable…”
     • 2.1.2. Use Windows Dictation function (Shortcut: window key+H to activate Dictation) and write text to Notepad.
     • All transcript text will be saved into a txt (plain-text) file. User needs to review, edit, and arrange text manually.
3. Create subtitle file “.SRT”:
   • 3.1. Subtitle “.srt” file contains the text which will be displayed on video screen.
   • We can have multiple subtitle files; each file for one languague.
   • Subtitle-file-name must contain video-file-name at the beginning. (E.g. video name: this_video.mp4, then subtitle name is this_video.srt or this_video_en.srt, this_video_vi.srt, etc.,). Save all subtitle files into the same folder with the video file; when playing video, it will automatically add all subtitle files; audience can select one of the subtitles in video player app.
   • 3.2. How to manually create a “.srt” file:
   • Watch video and add text into srt file in the following format. Can use Notepad to edit srt file:
   • order_number (start from 1)
   • hours:minutes:seconds,milliseconds –> hours:minutes:seconds,milliseconds
   • subtitle_text_here
   • For example:
   • 1
   • 03:04:05,150 –> 03:04:10,300
   • This is the subtitle for these video frames.
   • Continue until the video ends.
   • Source: https://www.indeed.com/career-advice/career-development/srt-subtitles
   • 3.3. Automatedly create srt file:
   • Try 1: Jubler Subtitle Εditor (https://www.jubler.org/download.html) — use MPlayer as video screen (https://sourceforge.net/projects/mplayerwin/files/latest/download).