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AviSource - Avisynth wiki
http://avisynth.nl/index.php/AviSource
AviSource takes one or more files - not only AVI but also WAV (audio), AVS (AviSynth scripts), and VDR (VirtualDub frameserver) files. There is built-in Audio Compression Manager support for decoding compressed audio tracks (MP3, AAC, AC3, etc). If more than one file name is given, AviSource returns a clip with all files joined end to end. For the files to be joined, the media …
DirectShowSource - Avisynth wiki
http://avisynth.nl/index.php/DirectShowSource
DirectShowSource(string filename [, float fps, bool seek, bool audio, bool video, bool convertfps, bool seekzero, int timeout, string pixel_type, int framecount, string logfile, int logmask] ) . string filename = The path of the source file; path can be omitted if the source file is in the same directory as the AviSynth script (*.avs).
BestAudioSource - Avisynth wiki
http://avisynth.nl/index.php/BestAudioSource
string source = Path to audio file. Path can be omitted if the script is in the same folder as the audio file. int track = -1 Positive track numbers refer to the FFmpeg given stream number. Negative numbers refer to the nth audio track with -1 being the first. int adjustdelay = -1 Delay adjustment; not yet implemented. bool exactsamples = false
Importing media - Avisynth wiki
http://avisynth.nl/index.php/Importing_media
For loading your AVI with audio you need (1) a VfW (Video for Windows) codec to open (that is decode) your video in AviSynth and an ACM (Audio Compression Manager) codec to open your audio in AviSynth. For many video and audio format …
Using AviSynth 2.5 (page 6/15): Opening Sources ...
https://www.afterdawn.com/guides/archive/using_avisynth_page_6.cfm
As the name implies, AviSource is primarily used to open AVI files, although AVS files (AviSynth scripts) can be opened with it, as can WAV audio files, which normally contain uncompressed audio. Related Software In order to decode video in an AVI file you must have an appropriate VfW codec installed.
NicAudio - Avisynth wiki
http://avisynth.nl/index.php/NicAudio
Description . NicAudio is an audio source plugin for MPEG Audio/AC3/DTS/LPCM and other uncompressed formats.. Requirements [x86]: AviSynth+ or AviSynth 2.5.8 or greater [x64]: AviSynth+ Syntax and Parameters. NicAC3Source / NicDTSSource NicAC3Source (string, int "channels", int "DRC")
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