This also lists the objects from those two libraries as internal (by adding
the ff_ prefix) so that they can then be hidden via linker scripts.
(cherry picked from commit c6610a216e)
current code wouldn't always error out on errors.
Based on patch by Stephen d'Angelo <sdangelo evertz com>.
Originally committed as revision 25260 to svn://svn.ffmpeg.org/ffmpeg/trunk
Therefore, init it with NULL to prevent a crash on invalid streams.
Patch by Zhentan Feng <spyfeng gmail com>.
Originally committed as revision 24960 to svn://svn.ffmpeg.org/ffmpeg/trunk
Zhentan Feng <spyfeng gmail com> as part of Google's Summer of Code program.
Originally committed as revision 24861 to svn://svn.ffmpeg.org/ffmpeg/trunk
