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Have been trying to convert my video files from AAC to eAC3. I don't have Adobe Media Encoder, and am trying to do this with FFMPEG. Any help is

Note: I have copies of the following software that may be of use:

  • Logic Pro 10.1.1
  • Final Cut Pro
  • Adobe Premiere Pro CC 2015 (without Adobe Media Encoder)
  • VLC
  • FFMPEG (Command Line)
  • Handbrake

I have been using ffmpeg -i input-with-aac-7.1-audio.mkv -c:a eac3 -c:v copy output-eac3.mkv to attempt a transcode, but it forces the mixdown to 5.1

getting this output:

Metadata:
  handler_name    : SoundHandler
 [aac @ 0x7ff3f40c4400] Assuming an incorrectly encoded 7.1 channel layout instead of a spec-compliant 7.1(wide) layout, use -strict 1 to decode according to the specification instead.

EDIT: used the -strict 1 -- it didn't force the stream into 7.1

Thanks for any help in advance,

B

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FFmpeg's eAC3 encoder does not support more than 6 channels. See bug report: Support >6 channels in E-AC-3 audio

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