I compiled your remux.c example and everything was OK. I ran it and...
"segmentation fault".
And what happened?
Everything went fine until:
line 107
if (in_codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&...
in_codecpar had a bad address! 0x2
OS: Kubuntu 24.04 LTS
__
I compiled your remux.c example and everything was OK. I ran it and...
"segmentation fault".
And what happened?
Everything went fine until:
line 107
if (in_codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&...
in_codecpar had a bad address! 0x2
___
f