[FFmpeg-user] yadif in ffmpeg filter usage

[redmember]

thanks. replay

The following are additional questions

I using window OS

ffmpeg builed on Windows (for MinGW) and developing MS Visual studio (C++)

I tried to.. below source code (for ffmpeg example)

// init filter code

************************************************************
 ***Q1 : if using yadif filter, how to make filter. below code was not
working in "avfilter_graph_config"
AVFilter *yadif    =  avfilter_get_by_name("yadif");
AVFilter *buffersink        = avfilter_get_by_name("buffersink");
************************************************************

AVFilterInOut *pSrc    = avfilter_inout_alloc();
AVFilterInOut *pBuffer  = avfilter_inout_alloc();

enum PixelFormat pix_fmts[] = { PIX_FMT_GRAY8, PIX_FMT_NONE };

filter_graph = avfilter_graph_alloc();

sprintf_s(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d",
		  dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,
		  dec_ctx->time_base.num, dec_ctx->time_base.den,
		  dec_ctx->sample_aspect_ratio.num, dec_ctx->sample_aspect_ratio.den);

ret = avfilter_graph_create_filter(&in_ctx, yadif, "in", args, NULL,
filter_graph);
if (ret < 0) {
	av_log(NULL, AV_LOG_ERROR, "Cannot create \n");
	return ret;
}
ret = avfilter_graph_create_filter(&out_ctx, buffersink, "out", NULL, NULL,
filter_graph);
if (ret < 0) {
	av_log(NULL, AV_LOG_ERROR, "Cannot create \n");
	return ret;
}

ret = avfilter_graph_add_filter(filter_graph, in_ctx);
ret = avfilter_graph_add_filter(filter_graph, out_ctx);

pSrc->name       = av_strdup("in");
pSrc->filter_ctx = in_ctx;
pSrc->pad_idx    = 0;
pSrc->next       = NULL;

pBuffer->name       = av_strdup("out");
pBuffer->filter_ctx = out_ctx;
pBuffer->pad_idx    = 0;
pBuffer->next       = NULL;

if ((ret = avfilter_graph_parse(filter_graph, filters_descr, &pBuffer,
&pSrc, NULL)) < 0)
	return ret;

************************************************************
*** not working code "ret = -22"
if ((ret = avfilter_graph_config(filter_graph, fmt_ctx)) < 0)
	return ret;
************************************************************


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