C ++ - ffmpeg yadif deinterlacing

I am trying to deinterlace a video with ffmpeg in my C ++ program. First of all I used avpicture_deinterlace

but is deprecated.

Look for more info, I've tried avfilter_get_by_name("yadif")

after avfilter_register_all()

but always return NULL

. I tried the following code too but still didn't work. I tried different parameters in avfilter_init_str

but err

always less than 0, it means there is an error.

int err;
// Register all built-in filters
avfilter_register_all();

// Find the yadif filter
AVFilter *yadif_filter = avfilter_get_by_name("buffer");

AVFilterContext *filter_ctx;

// Create the filter context with yadif filter
avfilter_open(&filter_ctx, yadif_filter, NULL);

// Init the yadif context with "1:-1" option
err = avfilter_init_str(filter_ctx, "\"yadif=1:-1\"");

      

        
        
        
      

    

I know the file filtering_video.c

is a good starting point for understanding how to create a filter, but I don't want to build it, I need to use the yadif deinterlacing filter. I have AVFrame

, but I don't know how to apply a yadif filter to it.

Any help is greatly appreciated.