2015-xx-xx - lavu 55.0.0
xxxxxxx - Change type of AVPixFmtDescriptor.flags from uint8_t to uint64_t.
+ xxxxxxx - Change type of AVComponentDescriptor fields from uint16_t to int
+ and drop bit packing.
2015-xx-xx - lavu 54.17.0
xxxxxxx - Add av_blowfish_alloc().