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how to extract audio from avi via avisynth - VideoHelp Forum
https://forum.videohelp.com/threads/380925-how-to-extract-audio-from-avi-via-avisynth
You can't really "extract" audio through avisynth, because it frameserves uncompressed audio and video. So you would be decompressing the original audio, then re-encoding it with something else, unless you planned to keep uncompressed audio
Extract - Avisynth wiki
http://avisynth.nl/index.php/Extract
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Frequently Asked Questions - AviSynth
http://avisynth.org.ru/docs/english/faq.htm
Avisynth Frequently Asked Questions ... Starting from v2.05 you can extract audio from a AVI-file in this way: WavSource("d:\filename.avi") Use the audio decoder plugin MPASource, see Q3.4 and Q3.5 for importing mp1/mp2/mp3 audio. See DirectShowSource for downmixing AC3 audio.
FAQ loading clips - Avisynth wiki
http://avisynth.nl/index.php/FAQ_loading_clips
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 such codecs are available, but certainly not for all of them. Here (...) you can find those codecs.
Avisynth: Audio only? - digitalFAQ.com Forums [Archives]
http://www.digitalfaq.com/archives/avisynth/12851-avisynth-audio.html
You can extract audio from avi with VirtualDubMod and from mpegs demultiplexing it, without use of avisynth. If you want to change audio "tempo" to adjust it to a fps change, you can do that with Besweet or, in this case with avs script + VDMod.
AudioMuxer User Guide (v0.9.6.5) - Surround By Us
https://www.surroundbyus.com/pub/audiomuxer/AudioMuxer_User_Guide_Public.pdf
AviSynth is a scripting tool that is used in the video encoding part of AudioMuxer. AudioMuxer uses the .Net framework (version 4 Client Profile) and can therefore only run on Windows XP (as of SP2), Windows Vista, Windows 7 and Windows 10. When you start AudioMuxer, the following options are available:
FFmpeg audio stream extraction on non-interleaved AVI ...
https://stackoverflow.com/questions/55966809/ffmpeg-audio-stream-extraction-on-non-interleaved-avi-slow-compared-to-avisynt
It looks like FFmpeg is reading and processing through the whole file whereas AviSynth can just extract the data without reading it. Example: ffmpeg -i file.avi -vn -ac 2 -c:a copy audio.wav. or. ffmpeg -i file.avi -map 0:a -ac 2 -c:a copy audio.wav. both work fine but take time.
Extract content from a DVD (page 3/4): Processing and ...
https://www.afterdawn.com/guides/archive/extract_content_from_a_dvd_page_3.cfm
Create a D2V project file for AviSynth and extract both the video and audio streams. Audio streams will have a name that reflects whether they start before, after, or at the same time as the video. C. Save Bitmap Save the current frame as a bitmap (BMP) image file. D. Demux Audio-Only Stream Extract audio streams to separate files.
AviSynth+ 3.7.1 Free Download - VideoHelp
https://www.videohelp.com/software/AviSynth-Plus
AviSynth+. NEW VERSION 3.7.1. AviSynth+ is a fork of the well-known frameserver featuring new functionality and optimizations not available in mainline. In the hope of modernizing AviSynth to meet present day needs and expectations, the project encourages everybody to help reach our goals: add long-sought features, energize the community, and ...
How to decimate video and audio keeping it in sync ...
https://forum.doom9.org/archive/index.php/t-91077.html
It is easier for me this way because the original audio is surround compatible mp3 audio at 44.1 Khz 112 Kb bitrate and for my phone needs to be much lower. As a result I still need to extract the audio and convert it at some stage, via avisynth I know it will be in sync even if I were to add anything later such as ivtc.
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