Audio file between -f 140 vs --audio-format mp3 in quality
I'm trying to figure out what is the best format to use when downloading music off YT. for available formats, for audio there seem to only be available 139/249/140/251. 249/251 is only .webm. So only 139/140 for m4a. The 140 seems to be 128kbps. While I can't see in winamp, I believe this gives 44100HZ
The --audio-format mp3 seems to be VBR kbps (around 130-140), and also shows 48000HZ.
The difference in size seems to be 4-5% higher for mp3. m4a seems to be as compatible as the mp3. While it's only a few kbyts difference, when you have a few thousand audio files, the space difference can start to become significant, my opinion anyway.
So, which one would you use?
Thanks