[FFmpeg-user] ProRes422 with 8 audio tracks converted to mp4 -- muffles audio 4

[Christian Ebert]

* Kieran O Leary on Thursday, November 22, 2018 at 19:00:06 +0000:
> On Thu, 22 Nov 2018, 17:28 Harvey Pikelberger <communque at gmail.com wrote:
>>> On Nov 22, 2018, at 8:50 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>> 2018-11-22 17:44 GMT+01:00, Harvey Pikelberger <communque at gmail.com>:
>>>> ffmpeg -i ffmpeg -i SoundMappingTest-I-8Discreet.mov -map 0 -g 48 -c:v
>>>> libx264 -profile:v baseline -crf 16 -c:a aac -b:a 256k -vf
>> scale=1280:720
>>>> -pix_fmt yuv420p SoundMappingTest-I-8Discreet.mp4
>>> 
>>> You (apparently) cannot copy the timecode track from mov to mp4
>>> but this is what you request with "-map 0".
>>> 
>>> Default behaviour would be to transcode one video and one audio
>>> track.
>> 
>> Questions:
>> Does the timecode issue explain the 'Conversion Failed'?
> 
> Yes I think so. Did you try adding -dn to your command line so that it
> ignores data tracks?

To prevent the mov timecode to be processed -dn does not help, 
use -write_tmcd 0. I don't know how this fares with -map 0 
though.

See: https://trac.ffmpeg.org/ticket/5492

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