ffmpeg yadif去隔行 [英] c++ - ffmpeg yadif deinterlacing

问题描述

我正在尝试在我的C ++程序中使用ffmpeg对视频进行隔行扫描.首先，我使用了 avpicture_deinterlace ，但已弃用.

I'm trying deinterlacing video with ffmpeg in my C++ program. First of all, i used avpicture_deinterlacebut is deprecated.

寻找更多信息，我在 avfilter_register_all()之后尝试了 avfilter_get_by_name("yadif")，但始终返回 NULL .我也尝试了下一个代码，但仍然无法正常工作.我在 avfilter_init_str 函数中尝试了不同的参数，但是 err 始终小于0，这意味着有错误.

Looking for more information, I've tried avfilter_get_by_name("yadif")after avfilter_register_all()but always return NULL. I've tried the next code too, but still not working. I've tried different parameters in avfilter_init_strfunction buterris always less than 0, that 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\"");

我知道 filtering_video.c 文件是了解如何构建过滤器的一个很好的起点，但是我不想构建一个过滤器，我只需要使用 yadif 去隔行滤波器.我有 AVFrame ，但是我不知道如何对它应用de yadif过滤器.

I know filtering_video.c file is a good start point to understand how to build a filter but I don't want to build one, I only need to use the yadif deinterlacing filter. I have the AVFramebut I don't know how to apply de yadif filter to it.

任何帮助都可以.

推荐答案

在较早的FFmpeg版本中，仅在使用--enable-gpl configure选项时才编译yadif.您可能需要更新至更高版本，或使用--enable-gpl重新编译旧版本.

In older FFmpeg releases, yadif was only compiled if --enable-gpl configure option was used. You probably need to update to a later release or re-compile the old release with --enable-gpl.

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