encode wav failure

gistfile1.txt

CmdRunner> sox -V1 106-untrimmed.wav 106.wav trim 550312 =552415
Next strategy: m4a

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****

CmdRunner> avconv -v quiet -y -i 106.wav -b:a 64k -strict experimental 106.m4a
Error running strategy Audio::Strategy::M4a: postconditions not met for Audio::Strategy::M4a in /home/app/app/shared/recordings: 106.m4a
Next strategy: mp3

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****

CmdRunner> avconv -v quiet -y -i 106.wav 106.mp3
Error running strategy Audio::Strategy::Mp3: postconditions not met for Audio::Strategy::Mp3 in /home/app/app/shared/recordings: 106.mp3
Next strategy: ogg

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****

CmdRunner> oggenc -Q -o 106.ogg 106.wav
Next strategy: move_clean

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****

Next strategy: m4a

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****

CmdRunner> avconv -v quiet -y -i 106.wav -b:a 64k -strict experimental 106.m4a
Error running strategy Audio::Strategy::M4a: postconditions not met for Audio::Strategy::M4a in /home/app/app/shared/recordings: 106.m4a
Next strategy: mp3

***** Debugger requested, but was not available (ensure the debugger gem is listed in Gemfile/installed as gem): Start server with --debugger to enable *****