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tebasuna51 · 5th April 2018, 15:49

EDIT: I used only the parameter -ac 2 to let ffmpeg select the default downmix...

We can also instruct ffmpeg with the desired downmix using a filter, for instance:

-af "pan=stereo|FL < FL + .7FC + .3BL + .3SL + 0.2LFE|FR < FR + .7FC + .3BR + .3SR + 0.2LFE"

But the problem is always the same, with normalized coeficients => low volume, with big coeficients => more volume but clip risk.

5th April 2018, 15:49	#11 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 6,915	EDIT: I used only the parameter -ac 2 to let ffmpeg select the default downmix... We can also instruct ffmpeg with the desired downmix using a filter, for instance: -af "pan=stereo\|FL < FL + .7FC + .3BL + .3SL + 0.2LFE\|FR < FR + .7FC + .3BR + .3SR + 0.2LFE" But the problem is always the same, with normalized coeficients => low volume, with big coeficients => more volume but clip risk. __________________ BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 5th April 2018 at 15:59.