MP4 muxing libs

Sup /prog/? Have any of you ever worked with:
A. x264
B. libmp4v2
C. GPAC's libraries
D. libavformat
E. Matroska libraries

If you have worked with any of these (but preferably one of the latter four), please let me know. I need to fix my MP4 writing code in Xdot before I can finally release an alpha.


_ _ _ _ _ _ __ _..._ ALL YOU FUCKING /prog/ USERS
_ _ _ _ _ _ .-' . . '-. THIS FUCKING PENISBIRD SHITS
_ _ _ _ _ _/. . ._ . ._\ DOWN YOUR NECK INTO YOUR STOMACH
_ _ _ _ _ /. . .(o) ./__) WHERE THE SHIT BURNS FOR THE REST OF
_ _ _ __ /. . .,_ . .| '| YOUR SHORT AND PATHETIC LIFE
_ _ _ _ |. . ./ .\ . /_/
_ _ _ _ /. . .`"`" . .} IT THEN GRIPS ONTO YOUR COCK WITH ALL ITS MIGHT
_ _ __ /. . . . . . . { AND INJECTS VARIOUS MUTAGENS INTO YOUR BLOODSTREAM THROUGH
_ _ _ /. . . . . . . .} ITS RAZOR-SHARP CLAWS WHERE IT REACTS WITH YOUR
_ __ /. . . . .\/\ /\ { VAST RESERVES OF FAT AND BLUBBER
_ _ |. . . . . .;``"``\
__ /. . . . . . / ; ; ;| NOBODY IS SAFE FROM THE PENISBIRD, AND IT
_ |. . . . . . / ; ; ; | FUCKING HATES ALL /prog/ USERS
_ \ . . . ._.-`|; ; ; ;|
_ /`-..--`` a a| ; ; ; | YOU ARE NEXT, YOU FUCKING FAT, FILTHY PIG
_|a a a a a a a|; ; ; ;|
_| a a a a a a | ; ; ; /_ _ _ _ ,--........,, FUCKING POST, YOU FUCKING
_|a a a a a a / ; ; ; ; _ _ _ .' . . . . . -='. BASTARD ASCII.. I CAN'T BELIEVE
_| a a a a a / ; ; ; / _ _ _ _\ . . . . . . . : THIS FUCKING STUPID LAMENESS
_|a a a a a/` ; ; ; \ _ _,==" .\ . . . . . . .' FILTER, WHAT AN ARSEFUCKING COCKLORD
_\ a a a .'. _ ,._'\.\~" o //` .\. . . . . .'
_|a a a.___~' \ \-~| | o ./,\.` .\. . . _.' WHAT KIND OF SHIT NAME
p|; a a/ _|.-~'| |o| |. . . . ,-''\..--' IS LAMENESS FILTER ANYWAY
p| _..-'"'. . .| | | |. . _="`
pp~ . . . \\ . | | / /_="` WHAT THE FUCK? MORE LIKE TROLL FILTER
ppp. . . ./,\ / /_,)") FUCKING CMDRTACO, YOU FUCKING FAT BASTARD
pppp . . ._,.-)")
pppp__,=~"| ===============
ppppp|; .;| Penisbird/. 1.3
pppp | y .| ===============
pppp |;|\ |
ppp_ |/' \| LETS GET IT ON, MOTHERFUCKERS.