2018-11-20 12:05 GMT+01:00, Carl Eugen Hoyos <[email protected]>: > 2018-11-20 4:28 GMT+01:00, Harvey Pikelberger <[email protected]>: >> Testing the creation of 8-audio-channel mp4 proxies from ProRes422 >> sources using ffmpeg. For some reason audio channel 4 of the mp4 >> is coming back muffled, like it got drowned in a pool. > > Every aac encoder will assume that one of eight input channels is the > lfe channel and will only encode low frequencies for this channel. > (Maybe not "every" but in any case, this is the issue you see.)
In case I misunderstood the issue and this is really 7.1 input but the encoding is broken: Our aac encoder provides acceptable output for mono and stereo, maybe not for other layouts and there is an unavoidable issue for 7.1 aac because of a flaw in the specification, feel free to test with the libfdk aac encoder. Carl Eugen _______________________________________________ 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".
