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AssFilter is an Open-source DirectShow subtitle renderer based on libass and the SubRenderIntf interfaces. Like the well known XySubFilter, AssFilter don't render the subtitles on the video. It instead communicate directly with the video renderer to send the subtitles. This process allow the video renderer to do what it wants with the subtitles.

Free software
OS: Win
File size: 615KB
Old versions
Version history
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Latest version

0.4 (November 17, 2017)


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Download AssFilterMod 0.4  615KB  Win

Download AssFilterMod 0.4 64-bit  703KB  Win64

Download old versions

Download AssFilterMod old versions

Software License

Free software / FOSS (Free download and also Free and Open Source Software)

Supported operating systems


Complete Version history / Release notes / Changelog

- add: System tray icon
- add: Selection of external subtitles in context menu of tray icon
- add: Open settings by left click on the tray icon
- add: Use of fonts in External Subs Fonts folder for SRT subtitles
- add: Libass is built with harfbuzz support
- add: Support of font ligatures
- add: Option to disable auto-load of external subtitles
- fix: Auto-load of subtitles with unicode characters
- fix: Auto-load of SRT subtitles on a different codepage than en_us
- Settings page is now split in two: General Settings and SRT Settings
- Add support for Visual Studio 2017
- Use my fork of libass
- Update libass asm building tools : Now use nasm instead of yasm

- add: Reset Settings button
- add: Auto-load of external subtitles
- add: Better SRT subtitles parser
- fix: Blur setting not working
- Values in the settings are now more in line with VSFilter
- Update to Visual Studio Update 3

- add: Support(incomplete) for movable subtitles (SRT)
- add: Support for drawing subtitles at custom resolution
- fix: The Apply button now activate when a change is made in Custom Tags
- fix: Random crash when the media player open a file
- fix: "Please update your subtitle renderer" message on madVR
- fix: Badly displayed subtitles with mpc-be internal mkv splitter

v0.1 Initial Release
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1 reviews, Showing 1 to 1 reviews

Easy to use, and it's nice to have now that it's been over a year since xy has been updated!

Thanks for releasing and maintaining this!

Review by Mike on Apr 3, 2017 Version: 0.3 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10

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