| Parameter | Standard MP4 | asako8439 MP4 (Better) | | :--- | :--- | :--- | | | [email protected] | [email protected] or [email protected] | | Bitrate Mode | Constant (CBR) | Variable (VBR) with 2-pass encoding | | Nominal Bitrate | < 1,500 kbps | 3,500 - 8,000 kbps | | Audio Bitrate | 96 - 128 kbps AAC | 192+ kbps AAC / AC3 5.1 | | Encoding Library | x264 core 148 | x264 core 164+ or x265 3.0+ | | Ref Frames | 3-4 | 6-9 |