On 9/12/22 09:33, Steven Ruppert via ffmpeg-user wrote:
I couldn't find any references whether that's inherent to the AAC 5.1 encoding, something that ffmpeg does, or inherent to the decoding process. (I did decode my same test files using something that uses Microsoft MediaFoundation and the LFE channel was still lowpassed).
Turns out the AAC codec inherently limits the LFE bandwidth, so there's no way around it.
The actual ISO/IEC 13818-7:2006(en) Standard costs a bunch of money to read as usual, but in the free glossary there is an entry:
>low frequency enhancement ( LFE ) channel: limited bandwidth channel for low frequency audio effects in a multichannel system
https://www.iso.org/obp/ui/#iso:std:iso-iec:13818:-7:ed-4:v1:en _______________________________________________ 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".
