libavcodec/mp3_header_decompress_bsf.c:69: error: Uninitialized Value
  The value read from frame_size was never initialized.

libavcodec/mp3_header_decompress_bsf.c:69:16: 
67.     header |= (bitrate_index&1)<<9;
68.     header |= (bitrate_index>>1)<<12;
69.     header |= (frame_size == buf_size + 4)<<16; //FIXME actually set a correct crc instead of 0
                   ^
70. 
71.     *poutbuf_size= frame_size;
