Best HEVC Encoder - How to Encode HEVC/H.265/4K Videos

Best HEVC Encoder - How to Encode HEVC/H.265/4K Videos: "How do I encode videos in HEVC h265 format? I have 600gb video data. I can see now all latest videos comes in h265 format in almost half size. I want to convert all my videos to HEVC format so I can save a lot of space for other important data. I have no knowledge about bit rate,frame rate and other stuff. Please give detail information."