Only realloc() bitstream buffer when the needed size increased, this is needed to prevent loosing bitstream data with large metadata.
Only realloc() bitstream buffer when the needed size increased,
this is needed to prevent loosing bitstream data with large metadata.


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@14279 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg