Merge commit '3cae7f8b'

* commit '3cae7f8b':
  cbs: Add some read/write tests
  http: Reset compressed header flag when starting to read a request
  cbs_h264: Fix writing streams with auxiliary pictures
  smacker: fix integer overflow with pts_inc
  smacker: return meaningful error codes on failure
  pixdesc: Add API to map color property names to enum values

This commit is a noop, see
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809b0402Merged-by: James Almer <jamrial@gmail.com>