I have input file: infile.mp3 This file contains metadata (artist, genre, etc.) I try remove all metadata for output wav file.
Yes! I found option:
-map_metadata -1
But output is unexpected for me...
$ ffmpeg -i infile.mp3 -acodec pcm_s16le -ac 2 -ar 44100 -map_metadata -1 ./outfile.wav
OK!
$ ffprobe outfile.wav
Input #0, wav, from 'inp.wav':
Metadata:
encoder : Lavf56.25.101
Duration: 00:04:00.47, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
You see? encoder metadata exists!
And in wav header after "subchunk1_id" with "fmt " value I expect "subchunk2_id" with "data" value (clear expected example):
$ strings outfile.wav | more
RIFFFB
WAVEfmt
data
But it is not (LIST, INFOISFT, etc):
$ strings outfile.wav | more
RIFFFB
WAVEfmt
LIST
INFOISFT
Lavf56.25.101
data
Well.. How to really remove all metadata for output file?
-fflags +bitexact -flags:v +bitexact -flags:a +bitexact