A list of codec ids supported by the filter, terminated by AV_CODEC_ID_NONE. May be NULL, in that case the bitstream filter works with any codec id.
A class for the private data, used to declare bitstream filter private AVOptions. This field is NULL for bitstream filters that do not declare any options.
No fields below this line are part of the public API. They may not be used outside of libavcodec and can be changed and removed at will. New public fields should be added right above. ****************************************************************