Those functions are only useful inside filters. It is better to not
support user filters until the API is more stable.
This breaks audio filtering API and ABI in theory, but since it's
unusable right now this shouldn't be a problem.
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.
Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
That was never required since avfilter_get_video_buffer() already
calls itself on the next link if get_video_buffer is not defined.
Originally committed as revision 20419 to svn://svn.ffmpeg.org/ffmpeg/trunk