4 min × 60 sec × (video bitrate ~20 kbps + audio ~4 kbps) = ~720 KB
The 3GP format is a simplified version of MP4, specifically engineered to minimize storage and bandwidth for 3G-era phones. When a video is labeled "only 1MB full," it indicates extreme compression. Video Quality : Expect very low resolution (often ) and noticeable pixelation. Audio Quality 3gp king only 1mb video full
: To hit a 1MB limit, resolutions are typically dropped to 128x96 (Sub-QCIF) or 176x144 (QCIF) . 4 min × 60 sec × (video bitrate