Comments (1)
This is most likely due to the internal mpeg4 encoder in FFmpeg being rather old and so it still includes inline mmx asm code that is only supported by certain versions of gcc. There are only a few places in FFmpeg that still have some old inline asm as most of the new work uses yasm/nasm, with mpeg4 being the main one that still has some left over.
So some of the mpeg4 code is just old and unsupported with msvc. All newer encoders don't show this kind of difference and most people don't use the internal mpeg4 encoder in favor of xvid instead anyway.
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