AviSynth

AviSynth is a very very powerful tool for video post-production. It provides almost unlimited ways of editing and processing videos. AviSynth works as a frameserver, providing instant and very fast editing without the need for temporary files.

AviSynth itself does not provide a graphical user interface (GUI) but instead relies on a script system that allows advanced non-linear editing. While this may at first seem tedious and unintuitive, it is remarkably powerful and is a very good way to manage projects in a precise, consistent, and reproducible manner. Because text-based scripts are human readable, projects are inherently self-documenting. The scripting language is simple yet powerful, and complex filters can be created from basic operations to develop a sophisticated palette of useful and unique effects

• Release Date: May 27, 2011
• Download(s):
  AviSynth_110525.exe
• Additions
  • Add dither option to Levels, RGBAdjust & Tweak.
  • Add BitAnd(), BitNot(), BitOr() & BitXor() script functions.
  • Add StrCmp() & StrCmpI() script functions.
  • Add YV24 support for Limiter show option.
  • Add "Global OPT_dwChannelMask={int}"
  • Add 0x0063F speaker mask for 7.1 WAVE_FORMAT_EXTENSIBLE.
  • Add .dll DelayLoad exception texts to crash message formatter.
  • ImageWriter, add support for printf formating of filename string, default is ("%06d.%s", n, ext);
  • Add avs_get_error(AVS_ScriptEnvironment*); to avisynth_c interface.
  • Catch and save AvisynthError text in more avisynth_c entry points, for kemuri-_9.
  • Add ScriptName(), ScriptFile(), ScriptDir() functions (WarpEnterprises).
  • Add SkewRows filter.
  • Histogram, Levels mode, Improve colour of chroma legends.
  • ConditionalFilter, teach about string results.
  • Add some more "Add/Remove Software" registry keys to the Installer (XhmikosR).
  • AviSource: Support both packed and DWORD padded raw planar input like with DSS.
  • Add IScriptEnvironment::ApplyMessage()
  • Add ImageSourceAnim (Wilbert)
  • Support user upgrade to 178 DevIL.dll (They need to manage CRT dependancies).
  • ImageSource: palette and compressed bmp images load correctly now (issue 894702) [need 178 DevIL.dll]
  • ImageSource: support for other formats like: gif, exr, jp2, psd, hdr [need 178 DevIL.dll]
  • Add YV24 mode to ColorBars.
  • Add ColorBarsHD based on arib_std_b28.
  • C-api usability enhancements from kemuri9 [Work in progress!]
  • Add Undefined(), AudioLengthLo(), AudioLengthHi(), IsYV16() & IsYV24() script functions
  • Allow newlines (and hence comments) before '{' -- Gavino
  • Added IScriptEnvironment::DeleteScriptEnvironment()
  • Added Histogram, population clamp % factor for "Levels" mode,
  • Histogram, revert "Stereo" mode to YV12, Add "StereoY8" mode,
  • AviSource: Support fourcc "GREY" as Y8
  • Added support for argument passing and EAX return value to SoftwireHelper.
  • Added "Global OPT_VDubPlanarHack=True" to flip YV24 and YV16 chroma planes for old VDub's.
  • Added "Global OPT_AVIPadScanlines=True" option for DWORD aligned planar padding
  • Added Matrix="AVERAGE" mode.
  • Added ContinuedDenominator/ContinuedNumerator(f[]i[limit]i) script functions.
  • Tweak: fix MaskPointResizing + put back Dividee ISSE code (use sse=true).
  • Added ChromaInPlacement, ChromaOutPlacement and ChromaResample options to planar colour conversions.
  • Added MaskHS.
  • Source tweaks to get ready for VC8.
  • Add Y8 for DevIL, planarize EBMP.
  • Planar support for many filters.
  • Added Info() time indicator on audio length and video (current frame & total). (2.5.8)
  • Added UtoY8 and VtoY8.
  • Added more info to Info(). (2.5.8)
  • ColorYUV: Added all adjustment parameters as conditional variables "coloryuv_SETTING". Enable by setting conditional=true.
  • ConditionalReader: Added support for type String.
  • ConditionalReader: Added offset keyword to offset all frame numbers after the keyword.
  • Added SincResize() with optional taps parameter (default is 4).
  • Added Custom band setting to SuperEQ to allow all 16 bands to be set from script. Usage: SuperEQ(clip,band1, band2, band3....) values are dB in float.
  • Added fast 0-1-0 kernel for YV24 to ConvertBacktoYUY2().
  • Added core formats: YV24, YV16, Y8, YV411.
• Bugfixes
  • Fixed YtoUV() output image size bug for 3 clip case.
  • Fixed ConvertToPlanar chroma alignment.
  • Fixed Levels (RGB) change use of PixelClip(x) to min(max(x, 0), 255).
  • Fixed SwapYtoUV yuy2 crash (StainlessS).
  • Fixed Overlay saturate UV in add and subtract mode.
  • Fixed Info.h range protect display characters (StainlessS).
  • Fixed AviSource packed planar import chroma offsets.
  • Fixed AviSource NULL GetWritePtr() failure due to premature setting of last_frame.
  • Fixed Mask rounding in greyscale calcs (Wilbert), minor refactor.
  • Fixed SelectRangeEvery audio snafu (Gavino).
  • Fixed LoadPlugin, SaveString of result string.
  • Fixed LoadPlugin, use _vsnprintf.
  • Fixed LoadVirtualdubPlugin, don't add vdub filter to chain on load failure.
  • Fixed rounding in RGB HResize (JoshyD) (affects all resizers)
  • Fixed error message name in the filter VerticalReduceBy2
  • Fixed SeparateFields() with variable parity input clip (Wilbert)
  • Fixed AviSource, cannot cast__int64* to long*, it does not work!
  • Fixed ConditionalReader: Don't allow out of range "Range" to overwrite edge values
  • Fixed MonoToStereo with stereo sources.
  • Fixed MergeChannels with only 1 input clip.
  • Fixed AviSource support for negative height DIB format AVI's.
  • Fixed Audio cache crashes.
  • Fixed resize with YV411, missing code.
  • Fixed ConditionalReader rounding with integer interpolation.
  • Fixed Softwire SSE2 bugs.
  • Fixed SSSE3 CPU detection.
  • Fixed SSSE3, SSE4.1 & SSE4.2 detection.
  • Fixed Fastwire encoding of instructions that are >2 opcodes (SSSE3+4).
  • Fixed _RPT5() macro for debug builds
• Optimizations
  • RGBtoY8 Dynamic ASM code, suport for RGB24.
  • YV24backtoYUY2 Dynamic ASM code.
  • UtoY8, VtoY8 abuse subframe, zero cost.
  • YV24<->RGB Add SSE2 and SSSE3 code paths, get rid of wide_enough.
  • ConvertToYUY2 Add SSE2, MMX restore full speed on platforms with poor ooox.
  • ConvertAudio, manage tempbuffer and floatbuffer independantly.
  • ConvertAudio, prefer SSE2 over 3DNow for super AMD cores.
  • Info.h, full refactor, a good example of "Never look down", thx StainlessS
  • DoubleWeaveFrames, If A not writable, try to write to B, else make new frame
  • Histogram, fix GetFrame/NewVideoFrame call order
  • HResizer, interleave code +4% faster
  • YtoUV() Abuse Subframe to snatch the Y plane / UV planes, Derestrict destination colorformat autogeneration.
  • ImageSource: Improve thread interlock code
  • ConditionalReader/WriteFile: Full refactor.
  • Replace _strdup with SaveString in AddFunction (Thanks Gavino)
  • SuperEQ: Improve channel unpacking/packing code.
  • H-Resize: Use SSE4.1 (movntdqa) loads for use once memory access.
  • H-Resize: Added SSE2 horizontal unpacker.
  • Resize: Use SSE3 (lddqu) loads for unaligned memory access.
  • Added ultra fast vertical PointResizer (64 pixel/cycle).
  • Added dynamic SSSE3 vertical resizer (16 pixel/cycle) ~ twice as fast as old MMX.
  • Added dynamic SSE2 vertical resizer (16 pixel/cycle).
  • Added dynamic MMX vertical resizer (8 pixel/cycle).
  • Added SSSE3 version for RGB<->YV24 conversions.
  • Added dynamic compiled MMX/iSSE for RGB<->YV24 conversions. Speed is approx 200% of C-code. Changes =======
  • ConvertToYUY2 Change from 0-1-1 kernel to 1-2-1 kernel.
  • Tweak make Interp same units as minSat and maxSat.
  • Check HKEY_CURRENT_USER for PluginDir first. (henktiggelaar)
  • Make forced, -ve, planar alignment of chroma planes match subsampling.
  • Enforce planar alignment restrictions.
  • C-api: Remove func sub-struct from AVS_Library struct
  • Add error code to plugin load failure message
  • Make default planar AVI output packed.
  • WriteFile() now supports unlimited number of unlimited strings. (was 16 by 254 byte strings).
  • ConvertToRGB*, make C++ code sample chroma the same as the MMX code i.e. use both pixels.
  • ConvertToRGB*, use YV24 path for planar, complain when options are present for YUY2.
  • ConvertToYUY2, use YV16 path for planar, complain when options are present for RGB
  • Thread safe code, part 2.
  • Correct IClip baked documentation
  • Fix at_exit executon order
  • Passify compilation error/warnings (XhmikosR)
  • for, const, extern and ansi patches for VC2008 (SEt)
  • Disable OPT_RELS_LOGGING option
  • Change implicit Last parsing for argless, bracketless calls to match bracketed cases. (Gavino) [not documented yet ???]
  • DirectShowSource: Support last minute format renegotiation thru IPin::QueryAccept() & Validate the size of the provided directshow buffer.
  • Remove non ascii chars from comments.
  • Add core stubs for DirectShowSource, TCPServer & TCPSource, report when plugins are missing.
  • Add note for original source downloads - SoundTouch
  • Add more lineage history to Info()
  • Move convertaudio, alignplanar, fillborder & MIN/MAX_INT definitions.
  • Run AtExit before dismantling world.
  • Change setcachehints definition from void to int. Test IClip version >= 5.
  • Move PixelClip definition to avisynth.cpp
  • SubTitle, etc, make X & Y options float (0.125 pixel granularity).
  • ShowSMPTE() supports all integer FPS and multiplies of drop frame FPS.
  • SubTitle, stop overwriting string constants (Gavino).
  • SubTitle, improve pixel registration (Gavino).
  • Make Info() CPU display hierarchical.
  • Thread safe code, part 1.
  • SoftwireHelper: explicit hardware exception handling.
  • Resize: Moved GetResampleFunction into Resamplefuntion, to allow overrides.
  • Resampler: Removed dead stlf code.
  • Updated Soundtouch to 1.31 (2.5.8)
  • Put dynamic matrix conversion into separate file.
  • Moved chroma subsampling to image_type section.
  • Added specific error reporting when requesting chromasubsampling with Y8.
  • Split up merge and plane Swappers.
  • Split up Plane transfers into separate classes.
  • Added automatic destination colorspace detection on planar YtoUV.
  • Took out greyscale and RGB32<->RGB24 from convert.cpp and placed them in separate files.
  • All code assuming UVwidth = Ywidth/2 and similar should be gone.