Remove a reference to a buffer. If this is the last reference to the buffer, the buffer itself is also automatically freed.
@param ref reference to the buffer, may be NULL
@note it is recommended to use avfilter_unref_bufferp() instead of this function
See Implementation
Remove a reference to a buffer. If this is the last reference to the buffer, the buffer itself is also automatically freed.
@param ref reference to the buffer, may be NULL
@note it is recommended to use avfilter_unref_bufferp() instead of this function