styp box is made twice

[ohjiwoo123]

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In memory-writing mode,
we use gf_isom_open using "_gpac_isobmff_redirect"
gf_isom_set_write_callback
after setting callback function
When exactly is the callback function called?
I think that gf_isom_finalize and gf_isom_close_segment call the callback function

And

If I want to call the callback function forcely, how to do that?

My plan is that
After making All segments, I calculate all duration of segments and allocate duration using
gf_isom_set_movie_duration
then I want to receive moov box data with a duration value assigned to it through callback function.

Can I use on_last_block_start to handle the above situation?

[ohjiwoo123]

I found the solution!
But I have Another Question!
After making dash segments,
I tried gf_isom_set_movie_duration and WriteToFile Function (for making movie box that added movie duration using callback function)
styp box is made twice.
I tried to find what problem it is, but failed.
what is the problem?

[jeanlf]

We don't have this behavior in the filters code. Could you please send some sample code reproducing your bug ?