AviSynth README

VapourSynth README

Note about LSMASHVideoSource and LibavSMASHSource

LSMASHVideoSource/LibavSMASHSource will/can result to worse performance compared to LWLibavVideoSource/LWLibavSource if it's used for anything than previewing. (#41)

Note about the file names (Windows only)

If you have issues about the file names save the AviSynth script (.avs) as UTF-8 or just enable UTF-8 code pages in Windows (if available) - Windows Settings > Time & language > Language & region > Administrative language settings > Change system locale, and check Beta: Use Unicode UTF-8 for worldwide language support.

Note about decoding audio and video from the same file in the same script

Always prefer this order

audio = LWLibavAudioSource()
video = LWLibavVideoSource()

over this order

video = LWLibavVideoSource()
audio = LWLibavAudioSource()

In the second case the file will be scanned twice and the video info will be written twice (overwritted) in the index file.

FFmpeg

This is the recommended FFmpeg version.

CMake building options
Option Description Default
BUILD_AVS_PLUGIN Build plugin for AviSynth ON
BUILD_VS_PLUGIN Build plugin for VapourSynth ON
ENABLE_DAV1D Enable dav1d AV1 decoding ON
dav1d_USE_STATIC_LIBS Look for static dav1d libraries ON
ENABLE_MFX Enable Intel HW decoding ON
ENABLE_XML2 Enable DNXHD support ON
ENABLE_VPX Enable libvpx decoding ON
VPX_USE_STATIC_LIBS Look for static libvpx libraries ON
ENABLE_SSE2 Force SSE2 ON
BUILD_INDEXING_TOOL Build indexing tool OFF
ENABLE_VULKAN Enable Vulkan decoding ON
ZLIB_USE_STATIC_LIBS Look for static zlib libraries ON
BUILD_SHARED_LIBS Build shared dependencies libraries (xxHash, obuparse, l-smash) OFF

Project links

Data verified by PyPI on Jul 8, 2026
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Key dates

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  • Released:
Newer release available (1310.0.0.0)

2 maintainers

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Avatar for msg7086 from gravatar.com msg7086 Avatar for Vodes from gravatar.com Vodes

Credits

Author: LSMASH Contributors

GitHub Statistics

Data verified by PyPI on Jul 8, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

ISC AND LGPL-2.1-or-later
View SPDX License List

Requires

Python >=3.10

Tags

vapoursynth lsmash video source

Classifiers

Report project as malware

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Release history Release notifications | RSS feed

1310.0.0.0

8 files

This release

1296.0.0.1 This release

8 files

1282.0.0.post2

7 files

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