libavcodec/pcm.c:346: error: Uninitialized Value
  The value read from src2[_] was never initialized.

libavcodec/pcm.c:346:9: 
344.                 samples += 2;
345.             }
346.         src = src2[avctx->channels-1];
             ^
347.         break;
348.     case CODEC_ID_PCM_U16LE:
