Converting AC3 / DTS to Opus. Am I overthinking this? 2020-01-09 21:49:27 I have some Dolby files which I'd like to listen to on my phone. Is there a way to figure out the optimal Opus bitrate, or am I displaying my ignorance?A stereo AC3 file is about 10MB @ 256 kbps. Converted to WAV it's ~60MB.I naively thought that if I did Code: [Select]opusenc --bitrate 512 in.wav out.opus it wouldn't use all 512, but reading the documentation, I understand it's a target. So the Opus file is twice the size of the original AC3.Using Code: [Select]ffmpeg -i in.ac3 -b:a 256k out.opus creates a file of the same size as the original AC3, obviously!I assume that Opus is a lot more efficient that AC3 or DTS - so re-encoding to the same bitrate is a waste of time. Is there a way to automatically figure out the best / most efficient bitrate?Or, should I just accept that 128k ought to be enough for anyone and use that as default.I'm prepared to be told that I'm being daft!