[FFmpeg-user] In case of future deprecation, a backup of audio routing script shared for public servicing.

[Sound Yuan]

Hi,

It's the pan filter's magic now. Thanks to everyone involved.

ffmpeg -f dshow -i audio="Line 1 (Virtual Audio Cable)" -filter_complex
"pan=5.1|BL=c0|BR=c1" -vn -f wav -vol 1024 - | "C:\vlc-3.0.6\vlc.exe" -
--prefetch-buffer-size=400

Best regards,

On Tue, Feb 12, 2019 at 9:44 PM Moritz Barsnick <barsnick at gmx.net> wrote:

> On Tue, Feb 12, 2019 at 12:26:55 +0800, Sound Yuan wrote:
> > Thanks for the suggestion. Forgot to tell that Line 1 is the real output
> > whereas Line 2 is a silenced source for nullifying front channels. I use
> > two cables separately for rear and front jacks, with earphones attached
> to
> > front one's extension and stereos to the rear's; Would try the quad
> > configuration when home after-hours.
> [...]
> > > > On Feb 11, 2019, at 6:42 PM, Sound Yuan <soundyuanofficial at gmail.com>
> wrote:
> > > >
> > > > ffmpeg -f dshow -rtbufsize 4 -i audio="Line 1 (Virtual Audio Cable)"
> -f
> > > dshow -rtbufsize 4 -i audio="Line 2 (Virtual Audio Cable)" -f dshow
> > > -rtbufsize 4 -i audio="Line 2 (Virtual Audio Cable)" -filter_complex
> > > "[0:a][1:a][2:a]amerge=inputs=3[a]" -map "[a]" -ar 48000 -vn -f wav - |
> > > ffmpeg -i - -filter_complex
> > >
> "channelmap=map=FL-BL|FR-BR|FC-FC|LFE-LFE|BL-FL|BR-FR:channel_layout=5.1”
> > > -vn -f wav -vol 1024 - | "C:\vlc-3.0.6\vlc.exe" -
> --prefetch-buffer-size=400
>
> I'm quite sure you can also chain the filters from the first and the
> second ffmpeg command. This could in turn reduce some of the latency.
>
> >
> $ [...] -filter_complex
> "[0:a][1:a][2:a]amerge=inputs=3,channelmap=map=FL-BL|FR-BR|FC-FC|LFE-LFE|BL-FL|BR-FR:channel_layout=5.1"
> [...]
>
> (without judging about the use of the filters for your use-case).
>
> Moritz
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