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

[Carl Eugen Hoyos]

2018-02-07 10:32 GMT+01:00 Frédéric Busnel-Joncour <fred.bj at free.fr>:
>>> 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.
>>
>> Sorry, I am not sure I understand correctly:
>> If you change the value "0" for Video Line Map in a 3840x2160 file
>> created with FFmpeg to "42", the file works with Avid Media Composer?
>
> As far as I know, yes.

How do you know?

> But I don't know how to change this value with ffmpeg or any other tool.

Either change the "default" video line map value in line 1166 of
libavformat/mxfenc.c and recompile or use a "hex editor" on
the output file.

Carl Eugen