Matroska format

[Benedictus Maximus]

Hi all,
 
I am trying to use gstreamer in my project, but I have some decode 
problems. 
In general, any 720p video in mp4 format plays fluently but the same video 
(=same raw video stream) in mkv format is VERY laggy (unwatchable): I would 
guess, 1 frame per 4 seconds(!). I am using a Nexus 7, so even software 
rendering should work with any 720p video (and so it does with any other media 
player, even xbmc).
 
Does somebody know, how to fix this? 
 
And beside that: the x264 project does not compile with armv7/JeallyBean. 
Because of this, I am not able to compile all gstreamer 1.0  using cerbero. I 
get tons of “undefined reference” erros:
“common/mc.c:535: error: undefined reference to ‘x264_mc_init_arm’” (and so 
on).
 
Thanks,
 
Marcus 		 	   		  
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