support wave files with 40 byte format chunk #10001
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For some reason when I used ffmpeg to convert some 96 khz sample rate wave files from 24 bit sample size to 16 bit it decided to use a 40 byte format chunk. This patch allows the 40 byte chunk if the existing format constraints are met. I would attach the converted files but I worry about copyright issues.
The wave files that I was converting are located at:
https://www.soundonsound.com/techniques/sos-audio-test-files-downloads.
The command that I used to perform the conversion was:
ffmpeg -i "<orig-file>" -bitexact -acodec pcm_s16le "<out-file>"