$ mplayer output.mov
MPlayer 1.3.0-6.4.0 (C) 2000-2016 MPlayer Team

Playing output.mov.
libavformat version 57.71.100 (external)
libavformat file format detected.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f0ea38e8f20]Protocol name not provided, cannot determine if input is local or a network protocol, buffers and access patterns cannot be configured optimally without knowing the protocol
[lavf] stream 0: audio (vorbis), -aid 0, -alang eng
Clip info:
 major_brand: qt  
 minor_version: 512
 compatible_brands: qt  
 encoder: Lavf57.71.100
Load subtitles in ./
==========================================================================
Cannot find codec for audio format 0x6F56736D.
Audio: no sound
Video: no video


Exiting... (End of file)