Below you will find pages that utilize the taxonomy term “Jailbreak”

Logs

Kindle Video Playback Hack

Prerequsite

  • The Kindle needs to be jailbroken.
  • Terimnal access on Kindle (Kterm or SSH)
    • Generate a directory to store all temporary files on Kindle, using /mnt/us/demo/ for example in this tutorial.
  • FFmpeg

Slice Video Frames

i=INPUT.mp4; w=1236; h=1648;
# Adjust resolution accordingly:
# - Kindle Paperwhite (11th gen.): 1236x1648
# - Kindle Paperwhite (12th gen.): 1264×1680
# - Kindle Colorsoft: 1264×1680

mkdir -p ./frames && ffmpeg -i "$i" \
-vf "transpose=1,\
	scale=$w:$h:force_original_aspect_ratio=decrease,\
	pad=$w:$h:(ow-iw)/2:(oh-ih)/2,\
	format=gray" \
-r 5 ./frames/frames_%04d.png

Copy all PNG images (the frames folder) to Kindle, put under /mnt/us/demo/.

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Logs

Kindle Jailbreak Cheat Sheet

Jailbreak

Tutorial Reference: https://kindlemodding.org/

Scripts Archive: https://scriptlets.notmarek.com/
Plugins/Tools Archive: https://www.mobileread.com/forums/showthread.php?t=225030

Tips

Expedite the process of cleaning filler files on macOS

  • Disable Spotlight on the Kindle

    sudo mdutil -i off /Volumes/Kindle

  • Expedite the cleaning process (should finish around 2 minutes)

    rm -rf /Volumes/Kindle/.active_content_sandbox

Otherwise it may take over an hour to delete the recursive folders (around 5000)

Equivalent/Mapping Paths

Folder /mnt/us/ on Kindle (internally) is the same as /Volumes/Kindle/ (externally) on macOS

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