Merge changes I8a14fcad,Iad7ca261,I2063c592,I9c5c74ab
authorAngie Chiang <angiebird@google.com>
Tue, 17 Mar 2020 23:32:15 +0000 (23:32 +0000)
committerGerrit Code Review <noreply-gerritcodereview@google.com>
Tue, 17 Mar 2020 23:32:15 +0000 (23:32 +0000)
* changes:
  Correct time_base of ivf header in SimpleEncode
  Add detail comments on valid_list in SimpleEncode
  Add missing Copyright to python files
  Move member functions up in simple_encode.h


Trivial merge