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

robertlazarski robertlazarski at gmail.com
Tue Jun 19 02:12:13 EEST 2018

On Mon, Jun 18, 2018 at 4:33 PM, Mark Scott <mark_scott at charlietango.com>

> 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?
> Thank you,
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On Linux you can read the LTC from a wav file via the ltcdump command, no
idea on other platforms. I am doing that right now actually.

Change the output from mov to wav:

ffmpeg -y -v error -nostdin -i my.mov -vn -c:a pcm_s24le -ar 48000 -ac 2

ltcdump -f 29.97 my.wav 2> /dev/null > my.ltc.txt

I recently discussed timecode with ffmpeg here:


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