How to disable Zlib compression on a PGS subtitles
Zlib reduces subtitle file size but uses more resources and can cause issues on older hardware. This guide shows how to disable it.
Tool needed
The steps
-
Open MKVToolNix. Go to Preferences (or press
Ctrl + P
). -
Go to the "Default values" tab. Check the box for "Disable additional lossless compression for all track types". This turns off automatic compression.
- Restart MKVToolNix. Verify the setting is active by checking the compression option for a new subtitle track; it should be set to "None" automatically.
Credits
Old owners - Simulping and an unknown person
New / Current owner - Clara
(With <3)
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