Bug#884232: ffmpeg: CVE-2017-17555

[Carl Eugen Hoyos]

This is not a bug in FFmpeg:
aubio initializes libswresample with 2 channels and then passes data
    that contains just one channel.

    That cant really work or how could it ?
    swresample has no knowledge about what is in the array except what it
    is told
    There are multiple ways to provide this information to swr

(Answer from Michael on ffmpeg-security)

Carl Eugen