9/24/2023 0 Comments Virtualdub mp4 encoder![]() %(tempaudiofile): Same as %(tempvideofile), but for the audio encoder.This file does not exist unless produced by the video encoder it is used as a temporary file to hold compressed video data that is eventually processed by the multiplexer. %(tempvideofile): The path and filename of a temporary file produced by the video encoder.%(outputfile): The path to the final output file, including possible drive specifiers and directories. ![]() This does not include the drive specifier or directory. %(outputname): The filename and extension of the final output file.%(fpsden): The denominator of the video stream frame rate, when represented as a fraction.%(fpsnum): The numerator of the video stream frame rate, when represented as a fraction, in decimal.The decimal separator is always a period regardless of locale. This number includes the fractional portion, i.e. %(fps): The frame rate of the video stream, as a real number.%(height): The height of a video frame, in pixels.%(width): The width of a video frame, in pixels.Tokens are special strings placed in the command line to specify that values from the encoding process should be passed to the encoder. The command line specifies the location of the encoder program and the arguments passed to it from VirtualDub. The encoder profile tells VirtualDub how to run the encoder. In order to use an encoding program, an encoder profile has to be created for it. Use this setting if the encoder set only includes an audio or video encoder to have the encoder write directly to the output path. Replace temp audio/video paths with output path: If set, then the temporary output path setting for the audio or video encoder is ignored, and the primary output path is substituted instead.Process partial output when render is aborted: Causes the multiplexer is run at the end of a process even if an error occurs during encoding or the Abort button is pressed.The leading period is optional but not necessary. File extension: The default filename extension to use in the file dialog UI.This is used as descriptive text for the file format produced by the encoding set. File description: The name of the output format, as shown in the file dialog UI.For instance, the same multiplexer settings could be reused whenever an AVI or MPEG-4 file is being produced, even if the encoders use different settings. ![]() An external encoder set includes one or more of:Īll three of these are chosen from encoder profiles to allow encoder settings to be reused. Configuring an external encoder setĪn external encoder set is a collection of external encoders that can be used to render a video. ![]() This is in addition to the threading done within VirtualDub itself, so audio/video decompression and filtering can use even more cores to make the most use of multi-core systems. For instance, the video encoder could use two cores, and the audio encoder could use another cores. During the main portion of the render, both the video and audio encoders are active in parallel, so they can benefit from multiple CPU cores in the system. Rendering through a set of external encoders works similarly to a normal render operation. For AVI files, VirtualDub uses codecs installed in Windows to do the encoding, and then handles the multiplexing internally these are all separate programs when using external encoding. The multiplexer then takes the output files from the encoders and combines them to form a single combined audio/video file. Video encoders and audio encoders take video and audio streams and compress them, respectively. The external encoding mode uses three types of applications: External encoder support allows VirtualDub to interface to encoding programs that don't support a full-fledged encoding API, but instead use a simple pipe interface called stdin.
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