rem: status_t get_next_encoder(int32 *cookie, const media_file_format *mfi, const media_format *input_format, const media_format *output_format, media_codec_info *ei, media_format *accepted_input_format, media_format *accepted_output_format)
add: get_next_encoder(int32 *cookie, const media_file_format *_fileFormat, const media_format *inFormat, media_format *_outFormat, media_codec_info *_codecInfo)
context: status_t get_next_encoder(int32 *cookie,						  const media_file_format *mfi,						  const media_format *input_format,						  const media_format *output_format,						  media_codec_info *ei,						  media_format *accepted_input_format,						  media_format *accepted_output_format){	UNIMPLEMENTED();	return B_ERROR;}