Convert MOV to MP3
Drop a QuickTime MOV and download an MP3 of its audio at 192 kbps. Sample rate and channel count carry over from the source.
Where MOV files come from
MOV is what iPhones, Macs, and most professional cameras write. The video inside might be H.264, HEVC, or ProRes, and none of that matters here: only the audio track is read, and it is almost always AAC or uncompressed PCM.
A ProRes master can run to tens of gigabytes. The file is read in pieces rather than loaded whole, so its size affects how long the read takes and nothing else.
The second lossy pass
Camera audio recorded as AAC has already been through an encoder. MP3 puts it through another one. For interviews, voiceover, and reference tracks this is fine at 192 kbps. For anything that will be mixed or mastered later, open the full tool and choose Original or WAV.