[Libav-user] Getting a Frame question

[M N]

08.09.2016, 16:45, "Carl Eugen Hoyos" <ceffmpeg at gmail.com>:
> 2016-09-07 20:26 GMT+02:00 M N <assemblerx86 at yandex.com>:
>>  What causes "Tag avc1/0x31637661 incompatible with output
>>  codec id '28'" in my code: http://pastebin.com/uXnHm52C ??
>
> avc1 is allowed in mov but not mp4.
>
> Please remember not to top-post here and cut your quotes.
>
> Carl Eugen
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I don't see anything related to .mov in my code, the input and output are .mp4, the output format is also mp4, where did mov come from then??