having problems playing mp4 vids

[maxima423]

i have some vids that i want to watch on my s3 when im on the go, but for some reason most of them arent playing, they are all mp4, some of them do play but the sound is not there. any solutions?

 

[zkSharks]

i have some vids that i want to watch on my s3 when im on the go, but for some reason most of them arent playing, they are all mp4, some of them do play but the sound is not there. any solutions?

How are you playing the files? Some audio codecs are not supported in hardware decoding, such as when using MX Player.