💻 FFmpeg

• cd to folder and open with ranger

• press v key and issue command :bulkrename

• in vim :w ~/Downloads/bulk.txt & exit

• bulkrename filenames in bulk.txt to: file constantpartoffilename_1.mp4

• vim ~/Downloads/bulk.txt

  • :%s/constantpartoffilename/file 'constantpartoffilename/g

  • :%s/.mp4/.mp4'/g

• Should result in: file constantpartoffilename_x.mp4

Cut out a slice (audio)

ffmpeg -i "song.m4a" -ss 00:00:38 -t 00:04:16 "song.mp3"

ffmpeg -i "2022-10-20 (1).mkv" -ss 00:00:00 -to 00:00:26 -c copy "2022-10-20 (1.1) - Snapping fingers (Character).mkv"

ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4

• AIO GUI: 🔗Kdenlive (create gifs with effects, etc.)

• 🔗Gifski may be the right choice for high quality gifs, but here are the basics with FFmpeg.

• Extract the subtitles if the subtitles are embeded (in this instance Scrubs Season 6 DVDs via MakeMKV).

  Would not work via my copies of The Office DVD box sets, but that’s ok.

• ffmpeg -i "/home/chris/Downloads/Shares/dr_rad_got_the_hose.mkv" -map 0:s:0 "dr_rad_got_the_hose.srt"

• Convert .mp4 to .gif while including subtitles and without changing the framerate (30fps).

  ffmpeg -i "/home/chris/Downloads/Shares/dr_rad_got_the_hose.mkv" -vf subtitles="/home/chris/Downloads/Shares/dr_rad_got_the_hose.srt" "/home/chris/Downloads/Shares/dr_rad_got_the_hose.gif"
  

Subtitles extracted from dr_rad_got_the_hose.mkv added to new dr_rad_got_the_hose.gif

ffmpeg -i "/mnt/Storage/Videos/Movies/Ice Age 3: Dawn of the Dinosaurs (2009).mp4" -ss 00:34:18 -to 00:34:26 -c copy "/mnt/Storage/Videos/iceage3weasel/Ice_Age_3_weasel.mp4"

ffmpeg -i "/mnt/Storage/Videos/iceage3weasel/Ice_Age_3_weasel.mp4" -vf fps=24 %d.png

For frame rate via Dolphin File Manager: Right click the file > Properties > Details > Frame Rate (23.98fps)

cd /mnt/Storage/Videos/iceage3weasel/

ffmpeg -i %d.png iceage3weasel.gif

ffmpeg -start_number 54 -i %d.png iceage3weasel.gif

54 in this case was the first image number

Ice Age 3: Dawn of the Dinosaurs (character: Buck) via DVD rip

Why not use .gifv or .webm? Video does not appear to be compatible with Github pages

• XnConvert: Batch Image Converter

  Downloads & Purchase > Linux > Linux DEB 64-Bit

• In Dolphin File Browser CTRL + F can be used to search for result

  Since Dolphin only displays the output of search, it’s easy to copy to a different folder for processing

Batch cropped from 1280 width to 401x400 with xnconvert

ffmpeg -i "/home/chris/Downloads/Shares/dr_rad_got_the_hose.mkv" -vf subtitles="/home/chris/Downloads/Shares/dr_rad_got_the_hose.srt:force_style='Fontsize=40,PrimaryColour=&H0000ff&'" "/home/chris/Downloads/Shares/dr_rad_got_the_hose.gif"

Font size: 40pts, Color: H0000FF

ffmpeg -i "/home/chris/Downloads/Shares/dr_rad_got_the_hose.mkv" -vf subtitles="/home/chris/Downloads/Shares/dr_rad_got_the_hose.srt:force_style='Fontsize=40,PrimaryColour=&HFFFFFF&,OutlineColour=&H80000000,BorderStyle=3,Outline=0,Shadow=0,MarginV=20'" "/home/chris/Downloads/Shares/dr_rad_got_the_hose2.gif

Background color: H0000000

Meaning the video is probably encoded with PGS subtitles, which are image based subs, and not text based.

• Subtitle Edit: Dependencies

  • apti mono-complete

  • apti libhunspell-dev

  • apti libmpv-dev

  • apti tesseract-ocr

  • apti vlc

  • apti ffmpeg

• Subtitle Edit: Download

  • The Linux version is the first ‘portable’ option under Files.

    Please see the known issues: Subtitle Edit for Linux

• Open Subtitle Edit with: mono SubtitleEdit.exe

  File > Open > Personal Files > … (takes a little while to process)

  • Follow these instructions to use the GUI to convert subtitles using OCR.

• Desktop entry: vim /home/user/.local/share/applications/subtitleedit.desktop

  [Desktop Entry]
  Comment[en_US]=Subtitle Edit
  Comment=Edit video subtitles
  Exec=mono /home/user/.sources/SubtitleEdit3611/SubtitleEdit.exe
  GenericName[en_US]=Subtitle Edit
  GenericName=Subtitle Edit
  Icon=/home/user/Pictures/Icons/subtitleedit.png
  Name[en_US]=Subtitle Edit
  Name=Subtitle Edit
  StartupNotify=true
  Terminal=false
  Type=Application
  Categories=AudioVideo;AudioVideoEditing;Audio;
  

  SE Icon can be found here or here.

  • sudo chmod +x /home/user/.local/share/applications/subtitleedit.desktop

• ffmpeg -i "source_video.mkv" -vf "subtitleedit_converted.srt" "output_video_ready_for_memes.mp4"

  Future clips copied out of output_video.mp4 will contain subtitles for the scene

  This method burns the subtitles to the video, so change font size, etc. if needed

The City of Violence (2006) – PGS to SRT

• Stackoverflow: How to Add Font size in subtitles in ffmpeg video filter

• SubStation Alpha

• How to set background to subtitle in ffmpeg?

• Stack Overflow: ffmpeg extract hdmv pgs subtitles from mkv to srt

• XnConvert: Batch Image Converter