0 Members and 113 Guests are viewing this topic. 2026-06-30 10:31:23 Hi, I recently did a full rewrite of FFmpeg's AAC encoder.  Everything from rate control, RDO, and all coding tools (PNS, TNS, I/S and M/S) was reengineered. Metrics-wise (Google's new Zimtohrli , ViSQOL , and my own hearing) it's apparently the best AAC encoder, compared to qaac and fdk-aac: kbps 8.1 fast 8.1 twoloop nmr fdk-aac apple libopus 64 0.01315 / 2.65 0.00696 / 3.24 0.00309 / 3.83 0.00322 / 3.69 0.00612 / 3.29 0.00100 / 4.59 96 0.00338 / 3.77 0.00268 / 3.99 0.00134 / 4.04 0.00153 / 3.98 0.00175 / 3.87 0.00039 / 4.62 128 0.00229 / 4.10 0.00170 / 4.28 0.00072 / 4.47 0.00143 / 4.27 0.00081 / 4.44 0.00020 / 4.68 160 0.00129 / 4.30 0.00108 / 4.44 0.00051 / 4.56 0.00065 / 4.31 0.00117 / 4.51 0.00084 / 4.68 256 0.00105 / 4.41 0.00121 / 4.55 0.00031 / 4.61 0.00103 / 4.45 0.00067 / 4.63 0.00002 / 4.73 Zim/ViS, lower-is-better/higher-is-better respectively. The rewrite will be merged today.…