This information includes the name and location of the file, as well as extensive information on each frame. Setting it to 1 will give you information from DGIndex regarding the source MPEG-2 file. Be aware that SSEMMX (Skal) is faster than the other options, but has slightly more error than the MPEG-2 specs allow.īy using MPEG2Source's "info" option you can get additional information about the video from MPEG2Source. It's usually best to set this in DGIndex and keep the same setting here. Since algorithms with slightly less precision are allowed, all the others make minor quality sacrifices to achieve faster decoding speed. A setting of 5 will give you the most accurate results because it's taken directly from the MPEG-2 specification. SSE2 is faster than SSE, which is faster than MMX.
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SSE2 is available on Pentium 4 Intel processors or any 64 bit AMD CPU. All Intel CPUs starting with the Pentium III and AMD processors from the AthlonXP forward support SSE. All processors from the Pentium II (actually Pentium with MMX) on for Intel, or K62 for AMD support MMX instructions.
Not all instructions are available on all CPUs. Values between 1 and 3 specify CPU instructions to use. Setting it to 0 forces the value specified in the D2V file by DGIndex. This algorithm, "idct", can be set between 0 and 7. The algorithm used to decode MPEG-2 frames is a function of your computer's CPU, and the amount of accuracy required vs. In addition to reading MPEG-2 files, MPEG2Source can supply other filters with information, as can the D2V files themselves. Although most modern computers have the necessary DirectShow filters to open these files using DirectShowSource, it's recommended to use DGIndex/Mpeg2Source whenever possible. Mpeg2Source uses a project file created by DGIndex to deliver video only. P>Mpeg2Source is a filter designed to work with DGIndex to read MPEG-2 files like DVD-Video or HDTV Transport Streams. Give additional for display over the video, writing to a file, or passing to other filters later in the script MPEG2Source MPEG2Source(str "d2v", ) ArgumentĪlgorithm to use when decoding MPEG video
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Other popular codecs include the free HuffYUV for lossless compression and Cedocida for DV from digital camcorders. Common codecs include DivX and XviD for MPEG-4 ASP (MPEG-4 Part 4) video. Related SoftwareIn order to decode video in an AVI file you must have an appropriate VfW codec installed. Example CodeOpen an AVI: AviSource("D:\Folder\Filename.avi") Open an AVI using the XviD codec: AviSource("D:\Folder\Filename.avi", FourCC = "XVID") Open an AVI but only use the video: AviSource("D:\Folder\Filename.avi", audio = False) Open an AviSynth script as an AVI file: AviSource("D\Folder\Filename.avs") Open a WAV audio file: AviSource("D:\Folder\Filename.wav") When To Use It 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. In addition to AVI files, AviSource can be used to open WAV audio or VirtualDub Frameserver (VDR) files. Common codecs for AVI files are MPEG-4 ASP (DivX, XviD), DV, AVC, and HuffYUV. Typically opening AVI files requires that a codec of some kind be installed. Since AviSynth was designed around VfW it can open AVI files using nothing but internal filters. Valid values are any fourCC with the correct codec installed Valid values are YV12, YUY2, RGB32, and RGB24įourCC to use when selecting video decoder. You can also get the streams from different files and combine them using the AudioDub filter.ĪviSource AVISource (string filename, [bool "audio" = true, string "pixel_type" = "YV12",Ĭolorspace of source video. You can open a single file containing both (or only one).
Going back to our script in the previous section, there are three basic ways to open your video and audio.
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The first thing you need to know how to do to use AviSynth is open one or more files.