Avisynth-how to choice of sound track

[NAFANJA]

I have video clip with two audio track, how to use Avisynth choose one of these tracks?

[Sharktooth]

demux the audio track first... then import the track you want to use.

[NAFANJA]

demux the audio track first... then import the track you want to use.

How can i do it?

[Sharktooth]

it depends on the videoclip format.
however, if you :search: you will know how.

[NAFANJA]

if you mean use not Avisythn it's not for me. I need write avs script which can choose on of audio track from video clip and then convert it.

[Sharktooth]

then you need an audio decoder for avisynth that supports multiple audio tracks and supports the selection of the audio track. i dont know if it exists.

[Ghitulescu]

Feel free to use any of these -> http://avisynth.org/mediawiki/Internal_filters#Audio_processing_filters

[jmartinr]

FFmpegSource

[NAFANJA]

Can you write example of avs script where choose audio track?

[AlekseiV]

Can you write example of avs script where choose audio track?audio = FFAudioSource("file.mkv", 2) # or track#3, or #4, etc
video = FFVideoSource("file.mkv")
AudioDub(video, audio)