Notes:- I forgot to turn of the COM environment debugging option when I made this build. The final release version will not have this feature. (It can cause problems with miserable software that employs anti-debugging technology. GRR!)

Additions

• Installer option for avisynth.lib, avisynth.exp and avisynth.map files.
• DirectShowSource() now sets _HIRESOUTPUT property of WMAudio Decoder DMO. Allows 24 bit samples and 6 channel decoding.
• Avisynth COM object now supports IAVIStreaming interface. Many apps blindly expect it and fail to load AVS scripts.
• Conditional Reader now also accepts T, F, Yes and No for bool data.
• DirectShowSource() log debug messages to file.
• DirectShowSource() force set framecount.
• DirectShowSource() accept audio streams of type WAVE_FORMAT_IEEE_FLOAT.
• Added KillVideo() verb.
• TimeStretch now exposes the tuning parameter of the SoundTouch library.
• Adding global OPT_AllowFloatAudio=True to your script enables WAVE_FORMAT_IEEE_FLOAT audio output.
• Explicitly request all the channels available in the audio stream [acm AC3]
• Explicitly try to request float, 32 bit then 24 bit samples from the audio codec.
• Accept raw audio streams of type WAVE_FORMAT_IEEE_FLOAT.
• Added installer option to add "Avisynth Script" item to Explorer shell for new .avs file creation.
• Added avs_delete_script_environment and avs_subframe_planar to avisynth_c interface.
• Hack to allow Fraunhoffer MP3 codec to work when wBitPerSample==16. (Squid_80)
• Added portugese translation (by RoLon), and partly french translation (by JasonFly)
• Subtitle multi line text, set LSP arg and use . (foxyshadis, tateu)
• xxxFPS("preset") string preset FPS values. (Tritical)
• Better avisynth_c cdecl/stdcall mismatch detection and protection (Tritical).

Bugfixes

• Fixed ConvertFPS() blend mode mix_ratio was wrong.
• Fixed AviSource() handling of dud AVI files that start with drop frames, just return the first key frame.
• Fixed DirectShowSource() handling of pin renegotiation.
• Fixed Overlay() "PC_Range" argument handling.
• Fixed SubTitle() crash when resources exhausted.
• Fixed Resizers cropping argument validation.
• Fixed % operator bad argument text message.
• Fixed stuffing Audio buffer with video graphics on Exception. Now returns E_FAIL. Video stream subsequently will return error text in graphic form.
• Fixed KillAudio() not resetting nchannels and sample type to 0.
• Fixed Conditional Reader sscanf buffer overrun.
• Fixed Version() and VersionString() timestamp discrepancies.
• Fixed Serious inaccuracies in TimeStretch. It is still not sample exact!
• Fixed Negative int arg handling for ApplyRange() and Animate().
• Fixed Installer handling of readonly/inuse target files.
• Fixed ConvertAudio SSE2 to Float alignment test.
• Fixed (auto)LoadPlugin altname generation. (Tritical)
• Fixed SaveString memory block overrun.
• Fixed $Plugin!Functionname!Param$ bug. (Fizick)
• Fixed registry handle leak on $PluginDir$ lookup. (Dave Brueck)
• Fixed memory leaks avisynth_c.
• Fixed returning locked/protected VBF's to LRU. (Tritical)
• Fixed runtime mixed SEH/C++ exception handling for XPsp2. (Tritical)
• Fixed CAVIStreamSynth::Read audio buffer overrun. (Avery Lee)
• Fixed DLL handle leak in LoadPlugin. (Tritical)
• Fixed Assert("text") no longer parses % args.
• Fixed number parser returning inaccurate float conversions.
• Fixed ConvertFPS() blend mode not processing of chroma planes.
• Fixed resizer resampling pattern attempted use after deletion.
• Fixed resizer subpixel shifting functionality being a noop.
• Fixed Info() auto font selection metric.
• Fixed Conditional error checking of float RHS.
• Corrected colours in YUV ColorBars, Now match BT.801-1.
• TCPDeliver updates: Client: Fixed crash if client gets disconnected.
• TCPDeliver updates: Server: Remember to disconnect clients when shutdown.
• Fixed Turn*() YUY2 mod 2 height test.
• Fixed AVISource() corrupted error messages.
• Fixed AVISource() direct input drop frame handling.

Optimizations

• SubTitle() releases all resources when the last frame of the clip is rendered.
• SubTitle() releases GDI resources after text map is created.
• ApplyRange() only builds 2 chains instead of 3.

Changes

• Map file is now generated for release builds.
• ConvertTo*() and GreyScale() now accept "Rec601" as a valid matrix name.
• DirectShowSource.dll upx'ed.
• Upgrade internal copy of SoundTouch library to 1.3.1.
• SoundTouch now available in RelSym build.
• Animate Integer arg enumeration no longer rounds toward positive infinity. Both positive and negative enumerations are identical. i.e. For Animate(0, 10, "Foo", 0, 0, 10, -10), Foo's arg1 = -arg2 for all frames.
• Selecting associate open with Notepad with .avs files in the installer now also includes .avsi files.
• The Installer now pushes a recovery dialog box when unwritable files are encountered during an install. The user may manually correct the problem and retry installing that file.
• SetMemoryMax() minimum now 4Mb instead of 16. (Tritical)
• Remove 50 plugin auto prescan load limit. (Tritical)
• COM QueryInterface calls now return S_OK instead of NULL.
• Bracketless call of argless function now get a cache. (Tritical)
• Over-range numbers now raise a compile time exception.
• xxxFPS(float) now uses continued fraction to generate a minimal rational pair. (Raymod2)
• ChangeFPS(linear=true) now raises a compile time exception if the speed change ratio is > 10.
• ConvertFPS() blend mode works for all pixel formats. (Tritical)
• Info() retrofit of 2.60 updates.
• TCPDeliver.dll upx'ed.
• RGB ColorBars +Q and -I bars, Hue is now correct, Luma is NOT zero to achive this.
• AVISource Audio no longer limited to 2 channels.
• SaveString memory blocks are now 32 bit aligned.
• Default planar chroma planes mod 16 aligned. See SetPlanarLegacyAlignment().

Program Information Category: Multimedia Type: Free Version: 2.5.7 RC-1 Size: 3.37MB Works on: Windows Product page: here