Merge commit '14e8e988cfdd01b665f5b49fb6f95a6c11ce3660' * commit '14e8e988cfdd01b665f5b49fb6f95a6c11ce3660': Always consider m4a files as audio, even when they contain a video track.
Merge commit '14e8e988cfdd01b665f5b49fb6f95a6c11ce3660' * commit '14e8e988cfdd01b665f5b49fb6f95a6c11ce3660': Always consider m4a files as audio, even when they contain a video track.