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To accommodate these limitations, the 3GP format aggressively compressed video and audio data. It typically paired H.263 or MPEG-4 Part 2 video streams with AMR (Adaptive Multi-Rate) or AAC (Advanced Audio Coding) audio. The resulting files had small footprints and low bitrates, making them easy to download and stream on primitive mobile hardware. However, this high compression resulted in a noticeable trade-off: pixelated visuals, low frame rates, and muffled audio. The Evolution of Mobile Video Consumption