Plays .mkv fine 720p & 1080p from a powered HDD
However, your Anime might be encoded at Hi10 (10 Bit) ... which the Raspberry Pi Does Not Support
Hi10 encoding is prevelent in the "Anime Scene" more info about it and what you need here:
http://haruhichan.com/wpblog/index.php/ ... guide.html
Use "mediainfo" to examine your Anime files to see if they are Hi10
This is a Post Regarding the Matter:
by jamesh » Wed Jul 25, 2012 6:37 pm
Just realised you said it was Hi10 - we don't support 10bit data, as it requires double the bandwidth and double the processing power, for very little if any perceived benefit. Some people claim a benefit for Anime etc, but using it means you reduce the number of players than can play it, and the difference in picture quality is unnoticeable.