When looking at an MP4 file's stream data, you will often see TBR alongside two other "time base" metrics:
The technical acronym stands for Time Base Rate (or r_frame_rate in technical documentation). It is most commonly encountered as a metadata value when using media tools like FFmpeg to analyze or convert .mp4 video files. Understanding TBR in MP4 Files TBR.mp4
: The fundamental unit of time used by the specific codec (like H.264) inside the file. When looking at an MP4 file's stream data,
: The time base provided by the MP4 container itself. TBR.mp4