libavformat/flvenc.c:501: error: Uninitialized Value
  The value read from flags was never initialized.

libavformat/flvenc.c:501:5: 
499.         avio_wb32(pb, data_size + 11);
500.     } else {
501.     avio_w8(pb,flags);
         ^
502.     if (enc->codec_id == CODEC_ID_VP6)
503.         avio_w8(pb,0);
