Hi again, For anyone interested, I used ffplay to minimize the wait-start time and maybe the resource cost after the post. However tonight it won't work anymore on my Win10: It just insists converting my 5.1 ffplay sound pipe into stereo, so I changed back to second-best VLC player option and it plays fine now. Now I can study online videos(!) with non-interfering background music.
Best regards, On Wed, Feb 13, 2019 at 8:47 AM Sound Yuan <[email protected]> wrote: > 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 <[email protected]> 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 < >> [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". > > _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
