[FFmpeg-user] AC3 7.1 audio support

[Moritz Barsnick]

Hi Markus,

On Wed, May 27, 2015 at 01:16:23 +0200, loeffler at eyetrap.net wrote:
> I cannot find any information about AC3 7.1 audio.
> Is that supported for encoding and decoding?

I can't say for the decoder, and have trouble interpreting the source.
But my encoders report that it is not supported (I queried ac3,
ac3_fixed, eac3 here):

barsnick at sunshine:/usr/new/tools/video/ffmpeg/ffmpeg-build-2015-05-19 > for encoder in ac3 ac3_fixed eac3; do echo $encoder:; ffmpeg -hide_banner -help encoder=$encoder | grep 'Supported channel layouts'; done
ac3:
    Supported channel layouts: mono stereo 3.0(back) 3.0 quad(side) quad 4.0 5.0(side) 5.0 2 channels (FC+LFE) 2.1 4 channels (FL+FR+LFE+BC) 3.1 5 channels (FL+FR+LFE+SL+SR) 5 channels (FL+FR+LFE+BL+BR) 4.1 5.1(side) 5.1
ac3_fixed:
    Supported channel layouts: mono stereo 3.0(back) 3.0 quad(side) quad 4.0 5.0(side) 5.0 2 channels (FC+LFE) 2.1 4 channels (FL+FR+LFE+BC) 3.1 5 channels (FL+FR+LFE+SL+SR) 5 channels (FL+FR+LFE+BL+BR) 4.1 5.1(side) 5.1
eac3:
    Supported channel layouts: mono stereo 3.0(back) 3.0 quad(side) quad 4.0 5.0(side) 5.0 2 channels (FC+LFE) 2.1 4 channels (FL+FR+LFE+BC) 3.1 5 channels (FL+FR+LFE+SL+SR) 5 channels (FL+FR+LFE+BL+BR) 4.1 5.1(side) 5.1

Moritz