This is good news for the people who watch these videos sped up. It's amazing how much more engaging some speakers are when you watch a video at, say, 1.4x the normal speed.
The files go from my podcatcher directly into sox for conversion. Sounds a lot nicer than the speedup mechanism provided by my mobile media player.
time sox --single-threaded -S "${FILE}" -t wav - tempo ${TEMPO} | lame -h -V 4 - ${NEWFILE} || exit 1
id3cp --v1tag "${FILE}" "${NEWFILE}"
Does anyone know of a way that doesn't need a conversion to WAV first?