convert: fix transcode on windows (#519)
convert: fix transcode on windows (#519)

Andypsamp/CODfinalJUNIT,moodboom/beets,kelvinhammond/beets,pkess/beets,PierreRust/beets,Kraymer/beets,kareemallen/beets,pkess/beets,mosesfistos1/beetbox,lightwang1/beets,andremiller/beets,diego-plan9/beets,xsteadfastx/beets,tima/beets,dfc/beets,jcoady9/beets,Andypsamp/CODjunit,madmouser1/beets,jackwilsdon/beets,krig/beets,Wen777/beets,lengtche/beets,lengtche/beets,xsteadfastx/beets,andremiller/beets,parapente/beets,YetAnotherNerd/beets,diego-plan9/beets,asteven/beets,imsparsh/beets,moodboom/beets,SusannaMaria/beets,Freso/beets,jackwilsdon/beets,beetbox/beets,Andypsamp/CODfinalJUNIT,Wen777/beets,Andypsamp/CODfinalJUNIT,artemutin/beets,kareemallen/beets,swt30/beets,YetAnotherNerd/beets,diego-plan9/beets,LordSputnik/beets,arabenjamin/beets,shanemikel/beets,YetAnotherNerd/beets,krig/beets,SusannaMaria/beets,jackwilsdon/beets,gabrielaraujof/beets,drm00/beets,MyTunesFreeMusic/privacy-policy,Andypsamp/CODfinalJUNIT,mried/beets,swt30/beets,lengtche/beets,sampsyo/beets,andremiller/beets,multikatt/beets,jcoady9/beets,multikatt/beets,LordSputnik/beets,PierreRust/beets,swt30/beets,multikatt/beets,gabrielaraujof/beets,mosesfistos1/beetbox,randybias/beets,marcuskrahl/beets,sadatay/beets,PierreRust/beets,jcoady9/beets,asteven/beets,randybias/beets,sampsyo/beets,SusannaMaria/beets,jmwatte/beets,ttsda/beets,Dishwishy/beets,tima/beets,randybias/beets,moodboom/beets,ibmibmibm/beets,Kraymer/beets,shamangeorge/beets,xsteadfastx/beets,parapente/beets,pkess/beets,jackwilsdon/beets,beetbox/beets,ruippeixotog/beets,kelvinhammond/beets,marcuskrahl/beets,madmouser1/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,dfc/beets,lightwang1/beets,beetbox/beets,PierreRust/beets,ruippeixotog/beets,moodboom/beets,bj-yinyan/beets,kareemallen/beets,Dishwishy/beets,lengtche/beets,Andypsamp/CODjunit,YetAnotherNerd/beets,Andypsamp/CODjunit,sadatay/beets,ruippeixotog/beets,Andypsamp/CODjunit,drm00/beets,untitaker/beets,untitaker/beets,bj-yinyan/beets,lightwang1/beets,asteven/beets,LordSputnik/beets,shamangeorge/beets,ttsda/beets,sadatay/beets,shamangeorge/beets,imsparsh/beets,imsparsh/beets,mathstuf/beets,gabrielaraujof/beets,bj-yinyan/beets,jcoady9/beets,swt30/beets,m-urban/beets,Kraymer/beets,artemutin/beets,Freso/beets,parapente/beets,sampsyo/beets,kelvinhammond/beets,kareemallen/beets,gabrielaraujof/beets,shanemikel/beets,shanemikel/beets,marcuskrahl/beets,jmwatte/beets,multikatt/beets,ttsda/beets,shanemikel/beets,mosesfistos1/beetbox,mried/beets,Wen777/beets,kelvinhammond/beets,asteven/beets,drm00/beets,bj-yinyan/beets,Andypsamp/CODfinalJUNIT,madmouser1/beets,arabenjamin/beets,mried/beets,drm00/beets,Dishwishy/beets,Andypsamp/CODjunit,mathstuf/beets,sadatay/beets,krig/beets,m-urban/beets,ibmibmibm/beets,ruippeixotog/beets,Kraymer/beets,tima/beets,mathstuf/beets,SusannaMaria/beets,arabenjamin/beets,untitaker/beets,sampsyo/beets,artemutin/beets,parapente/beets,diego-plan9/beets,Freso/beets,pkess/beets,shamangeorge/beets,dfc/beets,marcuskrahl/beets,untitaker/beets,m-urban/beets,dfc/beets,lightwang1/beets,ibmibmibm/beets,artemutin/beets,beetbox/beets,MyTunesFreeMusic/privacy-policy,madmouser1/beets,mried/beets,LordSputnik/beets,m-urban/beets,randybias/beets,ttsda/beets,ibmibmibm/beets,arabenjamin/beets,mathstuf/beets,jmwatte/beets,mosesfistos1/beetbox,xsteadfastx/beets,imsparsh/beets,tima/beets,Freso/beets,jmwatte/beets,Dishwishy/beets