id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
873,PCM signed big-endian encoding as unsigned,Glinx,,"Signed pcm sound codec (pcm_s16be) is encoded as unsigned and with 3ch audio instead of 6ch. After trying a few other pcm signed codecs they also came out as unsigned.

Archlinux bugtracker sent a new snapshot to try, with the same result.

Downgrading to a previous (November) release sorted this issue for me.

All command line output from FFmpeg suggested all was well and also signed. 
I only noticed pcm audio (s16be) was infact unsigned and 3ch instead of 6ch when loading into the video editor (Cinelerra) and then re-checked again with the Mediainfo program. 

The command I use; ffmpeg -i in.MTS -vcodec dnxhd -threads 4 -b:v 240M -pix_fmt yuv422p -acodec pcm_s16be -sn out.mov 
(My .MTS files have PGS text stream).
",defect,closed,normal,avformat,unspecified,fixed,PCM signed big endian mov muxer,,,,1,0