1. libavcodec/h264.c: In function ‘decode_update_thread_context’:
  2. libavcodec/h264.c:1554: warning: comparison of distinct pointer types lacks a cast
  3. libavcodec/h264.c: In function ‘ff_h264_frame_start’:
  4. libavcodec/h264.c:1729: error: ‘ff_h264_vda_decoder’ undeclared (first use in this function)
  5. libavcodec/h264.c:1729: error: (Each undeclared identifier is reported only once
  6. libavcodec/h264.c:1729: error: for each function it appears in.)