[FFmpeg-user] MXF container tags modified when replacing audio

Frédéric Busnel-Joncour fred.bj at free.fr
Mon Feb 5 19:07:28 EET 2018

>> Most of time it's not an issue, but in a particular case, the player
>> can't read properly the file as the "Video Line Map" tag value is
>> not what expected.
> How do you know that this is the (one) value that stops your player
> from decoding FFmpeg's output file?
> What is the value that your input file shows (and the player expects)
> and what value is written by FFmpeg?
> (I can confirm that for 3840x2160 no useful value is written.)

Hi Carl Eugen,

Thanks for support again !
As I'm not the end user, it's difficult to tell you exactly, but the problem occurs with Avid Media Composer.
Video Line Map should be at 42, and it's at 0.

Perhaps it's not technically possible, but an option like -keep_all_metadata would be very helpful in such case.

Best regards,


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