[FFmpeg-user] How to make ProRes files with SMPTE DTV audio for 5.1

Mark Scott mark_scott at charlietango.com
Tue Jun 19 19:30:22 EEST 2018

Thank you Frédéric,
You are correct! When I encode our master video files with Telestream's
Episode software, I use the 7.1 audio setting. Then I open the encoded file
in Quicktime Pro and change the audio configuration to SMPTE DTV. I want to
know if ffmpeg can create the correct audio without the extra step of using
Quicktime player. I'm concerned that if I upgrade my OS, I won't be able to
use the legacy version of Quicktime Pro. I'll try attaching the the files
Thank you!


ENCODED with Episode software, then changed audio config with Quicktime

On Tue, Jun 19, 2018 at 3:11 AM, Frédéric Busnel-Joncour <fred.bj at free.fr>

> >>> Hello,
> >>> I'm very new to ffmpeg. I work at a production company and I need to
> make
> >>> Broadcast ProResHQ files with 5.1 audio plus Stereo on Ch.7&8.
> >>>
> >>> I haven't been able to figure out the command line inputs to get the
> >>> correct audio configuration. I'm attaching a screen grab of the
> inspector
> >>> windows for the Master file, and for the broadcast file that I have
> made
> >>> successfully with other software. The resulting audio needs to be as
> >>> follows: 24-bit Integer (little Endian) SMPTE DTV (L R C LFE LS RS LT
> RT)
> >>> 48kHz. Our master files are exported with 6 mono tracks and 1 stereo
> >> track.
> >>>
> >>> The following command line creates a ProResHQ file with Stereo audio.
> >>>
> >>> ffmpeg -i TEST.mov -c:v prores -profile:v 3 -acodec pcm_s24le
> >>> TEST_ProResHQ.mov
> >>>
> >>>
> >>> How can I change the command line to get the SMPTE DTV audio?
> Hi,
> I can't see in your post any attached file or log, but I think there's two
> things to investigate :
> * -ac option and/or audio channels mapping.
> * audio tag or metadata, as default eight channels audio will be
> considered as 7.1 and not 5.1 + LtRt. Not sure that you can do it in
> ffmpeg, it was possible to edit this in Quicktime Pro, but this is legacy
> software, and was only available on OS X and Windows AFAIK.
> Best,
> Fred
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Mark Scott / Digital Distribution
Charlie Uniform Tango, Dallas
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