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 <[email protected]> > > > 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 _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
