HEVC (High Efficiency Video Coding) also known as H.265 is a newer codec which provides better compression. The DTVS-Smart1 has hardware support for H.264 codec. H.265 hardware codec support was not available when this unit was developed. Software solution (MXPlayer) has been tried but playback is not satisfactory.
The current recommended method of viewing HEVC content is to convert the content to H.264 and then view it. the FFMPEG utility can be used to convert the file or you can use other H.265 to H.264 converter. The following is the command to use to convert using FFMPEG:
<path to ffmpeg>ffmpeg -i "<input file name>" -bsf:v h264_mp4toannexb -sn -map 0:0 -map 0:1 -vcodec libx264 "<output file name>"