[question] example encoding-multiple mpeg4 can't play

[kaisawind]

example encoding-multiple output 3 files: mpeg1, mpeg2, mpeg4.
mpeg1 and mpeg2 work well, but mpeg4 can not be played.
I don't know what's wrong, i need some help for fixed it.

https://github.com/kaisawind/gmf/blob/master/example_encoding-multiple_test.go

[kaisawind]

output files here!
examples.zip