H.264 is a video compression standard used for HD videos. In fact, it’s the most widely-used video codec today. As such, this codec can be incorporated into several container formats like MP4, 3GP, MOV, FLV, and others. Most of the time, it’s encoded with the Advanced Audio Coding (AAC) codec.
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A file with a .trp filename extension is an HD (High Definition) video file that uses MPEG-2 compression. TRP files are typically used to synchronize audio and video codecs in DVB (Digital Video Broadcasting). The video codec is usually H.264, whereas audio data comes in AC3 format. This makes the TRP format to be supported by most media player programs.