How to get audio channel layout with FFMPEG or FFPROBE??

[RogerTango]

I am trying to get the channel layout of a multi-channel file, rather than 5.1, I want to see the layout, such as:

FL+FR+LFE+FLC+FRC+SL+SR


Does anyone know how to get the layout via CLI??

Thanks!
Andrew

[netmask56]

I don't know about a CLI, not part of my knowledge base but you could do it in Audacity or any other similar full sound editors.

[jack_666]

I suspect that this may be helpful.

https://forum.videohelp.com/threads/377474-How-to-see-a-5-1-file-s-channel-layout-Chan...eg#post2436851

[ProWo]

I am trying to get the channel layout of a multi-channel file, rather than 5.1, I want to see the layout, such as:

FL+FR+LFE+FLC+FRC+SL+SR


Does anyone know how to get the layout via CLI??

Thanks!
Andrew

The Standard Layout for 5.1 is:
FL+FR+FC+LFE+BL+BR

You can change the channels position with clever FFmpeg-GUI.


[Attachment 71906 - Click to enlarge]

[pandy]

You can do this indirectly - modified one of my scripts - you can modify it freely.
It shows information for stream (track) but also on frame basis as some audio codecs may dynamically change channel layout during time.

@setlocal

@REM Where to Find ffmpeg
@set FFMPG=%CD%
@set PATH=%FFMPG%;%PATH%

@SET file=%1
@SET fname=%~n1

@echo off

@ffprobe.exe -hide_banner -v 32 -select_streams a -i %file% -show_format > "%fname%.csv"
@echo: >> "%fname%.csv"
@echo - - - - - - - - - - - - - %file% - streams  - - - - - - - - >> "%fname%.csv"
@echo: >> "%fname%.csv"
@ffprobe.exe -hide_banner -v 32 -select_streams a -i %file% -show_streams >> "%fname%.csv"
@echo: >> "%fname%.csv"
@echo - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >> "%fname%.csv"
@echo: >> "%fname%.csv"
@ffmpeg.exe -hide_banner -layouts >> "%fname%.csv"
@echo: >> "%fname%.csv"
@echo - - - - - - - - - - - - - %file% - channels,channel_layout  >> "%fname%.csv"
@echo: >> "%fname%.csv"
@echo type,channels,channel_layout, >> "%fname%.csv"
@echo: >> "%fname%.csv"
@ffprobe -hide_banner -v 32 -select_streams a -i %file% -show_entries "frame=channels,channel_layout" -of csv >> "%fname%.csv"
@echo - - - - - - - - - - - - - -EOF- - - - - - - - - - - - - - - >> "%fname%.csv"

@endlocal
@pause

btw - information returned by ffprobe can be inaccurate as ffprobe shows only channel layout signaled by particular audio codec, ffprobe can't detect if this is accurate or not.

btw 2 - seem character chr(255) (blank square i.e. (alt+255) ) is replaced by '*' sign
never mind, replaced it by something compatible with forum engine

[RogerTango]

I ended up detecting the number of channels (1,2, 5.1, etc..) and then assigning channel layout that ffmpeg uses by default, did it in python.
I got working what I needed, thanks for your help & input!! (excuse the pun)

Andrew