Linux/TMDSEVM572X: play while recording (pwr)

Part Number:TMDSEVM572X

Tool/software: Linux

Hi,

I record an mp4 files in local HDD.

For a videosurveillance application, I would play the file in an embedded  display WHILE recording.

I want move in the file (pause, play, slow motion, ...)  .

Could you please give me a way to do it . I know it's possible, but i don't find anything.

Thank You