Note: MPEG4 is a container; H.264 is the compression standard within it. H.264 (also known as AVC) is the codec that compresses video files without killing quality. Older boxes only support MPEG2 (used for SD). If your box hasn't had the , it might fail to decode H.264 streams, resulting in "Audio Only" or a black screen for HD channels.
on the front or back of the device. The firmware file (usually a mpeg4 h264 dvbt2 software update top