dyn_buf_write    1051 libavformat/aviobuf.c     ret = dyn_buf_write(opaque, buf1, 4);
dyn_buf_write    1056 libavformat/aviobuf.c     return dyn_buf_write(opaque, buf, buf_size);
dyn_buf_write    1085 libavformat/aviobuf.c                             max_packet_size ? dyn_packet_buf_write : dyn_buf_write,