I am using ffmpeg to convert an mp3 file to wav. Depending on whether I use streaming mode, I get different size files. In other words, the following generates different sized files:

ffmpeg -i in.mp3 in.wav
ffmpeg -i - in.wav < in.mp3

What is ffmpeg doing differently in the two scenarios? Is one version inherently "better" than the other?

  • Share full logs. What is the difference in sizes? – Gyan Jul 13 at 5:36
  • Drors-MacBook-Pro:Downloads drormaydan$ ls -l in.mp3 -rw-r--r--@ 1 drormaydan staff 9113 Jul 17 14:19 in.mp3 Drors-MacBook-Pro:Downloads drormaydan$ ffmpeg -nostats -loglevel error -i - in.wav < in.mp3 Drors-MacBook-Pro:Downloads drormaydan$ ffmpeg -nostats -loglevel error -i in.mp3 in2.wav Drors-MacBook-Pro:Downloads drormaydan$ ls -l in.wav in2.wav -rw-r--r-- 1 drormaydan staff 92502 Jul 17 14:27 in.wav -rw-r--r-- 1 drormaydan staff 88354 Jul 17 14:27 in2.wav – Dror Maydan Jul 17 at 21:24

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