Sony KDL-40EX725 _ mkv without video, only audio..

Hi, I have a Sony KDL-40EX725, and reproducing mkv. (Serviio V 1.4) I see some good and some only play audio without video. Because it can be?. Sorry for my English. Thank you.

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Post the results from mediainfo on files that don't play so we can see the file details

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